| Ed LaFontaine |
Hi Nordic,
I received the contact info and have sent a message off to him. He'll get his package with minimal delay.
Now I can open my package...:clown:
"Blazing Saddles" was on TV this evening. :D :D :D "Its twue...its twue...its twue.........its twue" |
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| destroyer X |
Good Mongo...enjoy your amplifier.... i am happy you have it... and you do not imagine how this makes me feel happy.
regards,
Carlos
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Yes Nordic
I watched inside myself and i was worried to give up related my hobbie.... parts finishing...money too.....i felt sad and decided to sacrifice a lot of things i have in home, to dismount to have parts to my hobbie.
I call friends and they gave me a lot of nice junk.
The day after tomorrow i will go to my friend Paulinho's house to colect a lot of damaged things to dismount.
Will use 100 dollares to buy some small transistors (finished completelly), and some BD139/140 to continue my research.
Dudainc will include some small parts into the package you have sent him.... already has precious Field Effect Units there..... and i am watching my Class D unit..... hummmmmm...... has interesting supply.....nice output Fets....hummmmmm..... i think it will die for the cause of my continuity...to me to continue my activity.
So.... there are friends and hopes.... i think, soon, things will became better to me.
I am also lucky...one of those days someone will send an old system to the garbage can while i was having my morning walk..... and inside i will have hundred of parts to be cleaned, selected and used...ahahahha...i love those things.
No pension entering my pockets dear Nordic....no employment too...56 years old...no hope into this country to old folks...my wife is maintaining the house (ex wife).... i think she wants to keep me around (i cannot understand some women)... so.... parts is something very difficult to buy here.
I had a revoluctionary idea..... and this one no one had!... depends from Fets...the ones you send will be used and will produce a new thing for us.
regards,
Carlos |
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| Nordic |
| I put some bd139 and 140s in your envelope, not many but a handfull, to keep you going... |
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| Ed LaFontaine |
Santa Claus wants to know what is on Carlos' Christmas list.:santa2:
Rudolph is up to the task :deer:
Carlos, My family takes some pleasure in asking each other what is on their "list". Each of us has to suffer through well-intentioned teasing until the list is produced. So, it only serves to prolong the teasing if one resists making a list....What is on your list? |
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| dudaindc |
Tio Carlos
According to Santa, your "gift bag" will include these semiconductors: 2SA1303, IRF9530, 2SA1943, FJL4215, IRFP064N, FQA34N20, BUZ11A, IRFZ44, TIP32, TIP32, BD139, BD138, BYV29F, LM3886T, LM4708TA, LM4701, etc. Hence you don't need to purchase any of these.
I will ask one of the Elves to compile a complete list and send you in the next 24 hours or so. Santa wanted to keep it a "secret", but he will understand that all I am trying to do is to avoid you spending money on parts that are already on his list.
:hohoho:
I checked my "Nordic account" for the tracking number - Nordic set the bar way upthere with this groupbuy - outstanding!
After little "research" (using Clusty - 100x better than Google IMHO) I got here: http://oraweb.sapo.co.za/track_trac..._id=rd100840555
The package was mailed on December 3rd and it is currently in transit. I guess we will both be clicking this link on a daily basis. I am hopeful the package will be delivered in DC before the 17th..:xfingers:
Well, I need to leave for the office (yes, I know it is Sunday), but I need to catch up with some work delayed by the snow early this week.
Cheers!
:snowman: |
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| dudaindc |
:Popworm:
Forgot to include IRF1405, MJE15032, FQP50N06, FEP16TDA. |
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| destroyer X |
Many circuits and pleasant moments will come because of you folks.
Duda, Nordic and some local friends are already supplying enougth material to run a lot of amplifiers.
The list now is the amplifiers will be tested, the prototypes will be submited to crash tests and so on.
thanks a lot... also the BD139.
Also i will spend 100 dollares, and this will increase the stuff a lot.... as i can buy 2 BD139 by a single dollar here..... Phil is the mark there.... ahahahahah.... maybe Philips, or Philarmonica..... or something alike..
It is OK boys.... you can stop to worry... already supplied...thank you all.
regards,
Carlos |
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| t-head |
Ed,
I went to the Post Office and among the many bits of junk mail was an envelope from you...many thanks to you, Nordic and Uncle Charlie (Obrigadao, Titio Carlos).
Holy S***! Now I have to learn how to build an amp from these little parts...:xeye:
Ciao, Richard |
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| destroyer X |
I can help you, and i will be glad to do it.
I have MSN, and using it daily you will be able to ask everything you need.... also you have my mail.
I am here, full time free, to support my friends, the Dx crew and the ones came more close.
panzertoo@yahoo.com
nanabrother@hotmail.com (MSN)
regards,
Carlos |
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| Westley |
I also received my package today. Many thanks to Nordic, Ed, and Carlos for this gift. I have never been a part of a GB that was so organized with all the parts labelled and ready to go.
All the best to you all. |
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| Nordic |
Ag, its not so hard man...
Install components as per silkscreen...
Small resistors first (install R27 under PCB to leave clearance for large cap), then zeners as you want to leave some air clearance under the zeners...
Install wire links in position marked 'link1' and one from ground to the point marked 'to GND'
Then prepare the transistors, using the heatshrink tube.
Install heatsinks on driver transistors before soldering into PCB.
I only inlcuded 4 small pieces of insulation with the first kits, only use on the BD140 side incase there is a short with R27 (try to install high enough to leave some clearance), and use the other piece to insulate the bias servo (Vbe multiplyer), If you got six pieces just install them all.
Note orientation of transistors... they dont both go on same side of sinks...
Build the bias servo boards and attach useing the supplied pieces of wire... I will put pictures up a little later...
Install bias servo... use multimeter to measure between the two servo connection points and adjust servo trimpot until meter reads 3k ohms.
then use meter to measure from right leg of R5 (at 12v zener) and the left leg of R11 or 12, adjust R28 to about 6K ohms.
Install caps and prepare for final bias adjustment etc...
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| Francois G |
The package with PC boards and other goodies arrived yesterday in Central Illinois.
Everything looked great and I want to add my thanks to Nordic for an impressive job - it clearly was a labor of love. Thanks also for the extra items that I did not even expect.
Of course, thanks very much to Ed for forwarding the US packages and to the man who started it all -- our friend Carlos.
My hat off to all of you -- real gentlemen!
Francois |
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| destroyer X |
and also Dx sonics...be happy...this will be all i want from you.
regards,
Carlos |
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| salesmonster |
| Carlos: I'm sure we will all be thrilled with the sonics...now just to find the time to actually start building. :( |
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| destroyer X |
You will be happy with it.... that's what i wish, what i believe and i hope.
regards,
Carlos |
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| Nordic |
| Finaly got my HRII up and running again, the little protection board was quite particular over its resistor values and I had some issues with one channel clicking on and off until I got that resolved... All working fine, plus I did the mod of replaceing the 330R resistors with 220R ones. And I can recommend that you start off be swapping out those 330Rs for some 220s too, else you might come back and ask where the volume is, if you have a weak source or one that only likes large amp input impendances... |
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| pistoljoe |
Mine came today. Thanks to everyone involved-- Carlos, Nordic, Mongo.
What are people using for C7? Is this as important as it looks?
Joe |
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| destroyer X |
part into the circuit...the first one is the Miller capacitor, the compensation one.... into the Voltage amplifier, the one i ask to use 150 picofarads, and to descend (reduce) the value if you want to have perfect trebles..... have to go reducing till oscilation starts, and them increase two steps into the standard capacitors value progression.
This condenser, C7 is there working for DC and AC..... one of its work is to stabilize the voltage there, turning the circuit more resistant to supply voltage variations.... the condenser's positive side will hold something alike 20 volts DC.
For AC, observe the condenser negative side goes to the output line.... there, into that line, the voltage will be oscilating, waving, variating, fluctuating, changing.... polarity will change referenced to the ground level..., variations of 50 volts peak to peak can appear there.... in some moments your negative output audio swing will measure 33 volts negative....and the condenser positive side will hold 20 volts positive for a good period of time... this means you will have 53 volts charging the condenser....this will result into a voltage bigger than the 20 volts it uses to have during stand by mode, iddle mode, when have no signal entering.. dinamically, this increase in voltage will affect the output stage performance... the bootstrapp effect.
The condenser will reach bigger voltage when operating... and, of course, will be crossed by audio...... the audio present at the speaker positive terminal will be sent back to the drivers... almost instantaneously.
It will be good idea to use a good brand on that position, also a 64 volts insulating voltage for it..... the condenser can be increased, but tests made shown me that values upper than 220uf are overkill there...not affecting audio reproduced....47uf and 100uf worked excelent in that position.
What the bootstrapp does..... it is a leather ring to hold your boot in place while you push your feet inside the boot..... the circuit does the same...the condenser charged hold the voltage to a value bigger than the normal voltage into the positive side... condensers are resistant to voltage variations...they use to stabilize, to hold voltage, to hold..to keep constant.... also the strapp into the boot hold the boot in place... them the audio will be injected the same way you feet enter the boot...with some energy...with bigger energy..with some violence...the bootstrapp effect.
The voltages informed here, are not precise, just as example...real life you will find plus or minus 20 percent differences on that.
regards,
Carlos |
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| Ed LaFontaine |
Sua explanação é muito útil.
A luz brilha em minha cabeça dura |
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| Francois G |
Nordic wrote:
"I can recommend that you start off be swapping out those 330Rs for some 220s too"
I can't find a 330 ohm resistor; could you tell us which? |
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| SteveA |
Got mine yesterday. Thanks Nordic, thanks Ed
SteveA |
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| Nordic |
| quote: | Originally posted by Francois G
Nordic wrote:
"I can recommend that you start off be swapping out those 330Rs for some 220s too"
I can't find a 330 ohm resistor; could you tell us which? |
My bad, it was 390R, R18, R20 |
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| destroyer X |
sometimes can produce harsh if you have too big level of treble.
The treble booster capacitor is not really needed.... was my need because of my speakers..now a days the speaker problem is already fixed.
The treble booster capacitor do not accept musics that already have too big treble level, and can be a problem... i suggest, if not needed to your system, not to use them.
You can reduce those 470 ohms to lower value.... even to 100 ohms if you prefere... also the parallel capacitor can go to 22N or 27N and will work fine.
regards,
Carlos |
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| dudaindc |
Carlos,
We got mail... from South Africa!
All goods at hand and in perfect shape!!
Start your soldering iron!!!
:cloud9:
========================================================================
Nordic
Before heading to my office this morning, I went to the post office to pick up my (Carlos') goods.
Everything arrived perfectly packaged and labeled - it could not be done any better.
Kudos to you!
:worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: :worship: |
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| Nordic |
Wow big relief, that was a large envelope... 600g
Kinda hard stuffing heatsrink into an envelope... |
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| dudaindc |
| quote: | Originally posted by Nordic
...
Kinda hard stuffing heatsrink into an envelope... |
Using a heat gun perhaps...? :joker: |
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| destroyer X |
thank you Nordic...i am sure there's surprises inside...and Duda will be kind not to tell me.
He told me a lot of things he is packing to me...but for sure he will respect your desire of surprise.
ahahahah...i hate surprises...but i like you..so....no problem..kein problem.
I am very happy..for sure i am..... package arrived into Duda's hands... so.... he will come to Brasil and next 18 or 19 it will into my hands... this Christmas will be fine.
Daugther already send an old digital camera to me...so...while the Canon is under repair i will have something that will be helpfull.
We have our National Air Company once more..... Varig!
thank you.... nice news...nice news!...yessssssss!
Carlos |
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| destroyer X |
Do not worry...my Christmas tree will grow up.... take it easy...we need to be patience.
regards,
Carlos |
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| destroyer X |
attached,
regards,
Carlos |
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| nogoodboyo |
Hi Carlos,
Have you ever checked out Automobile parts stores for heatshrink, or ask a local mechanic? Maybe they can get some? |
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| destroyer X |
And covering them, another rubber plugs, those ones attach one to the other...watter do not enters there.
I never had informs we have that stuff here.... we are delayed related that..and this surprises me.... we have heavy industries, electronic industries, automobile industries.... all home appliances..all stuff... we import turbines for airplanes and some turbines for Hidraulic Energy Generation...but even having a nice level of technology installed into the country...chips factories, semiconductors factories too.... we do not have those things.
Also we do not have a lot of things USA has related internal home stuff..our homes are made using bricks, cement, sand, ceramic floors and ceiling cover, aluminium to windows, concrete and plastic paint..we do not use wood!
Ahahahah... all imported to Beverly hills.... i was there and i could see "Wood from Amazon"... was so shocking to me, and the first time i felt a Nationalist feeling... was sad...the wood was beeing used to internal frame to the rich guy's houses...not the outside nice polished thing...only for internal extructures...frame.... aaagh!...baaaaah!.... grrrrrr!
I was shocked.... i found the first tree and i left something there alike a dog!
And i said to myself:
- "here is something for you Sam!.... all wood we have you use... and also complain because wood is finishing into Amazon jungle!"
Not true!.... theres billions and billions of trees.... thousands and thousands of square meters of ground... zillions of litters of good watter.... this will not finish so soon...maybe the polution will finish with us before that.
Awfull that!
regards,
Carlos |
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| rabbitz |
Just would like a bit of clarification on the Bias Servo.... VBE as I'm close to that stage.
Look at the schematic and then at the pic of the VBE layout and they seem like 2 different setups. The layout looks like the one from the orginal DX..... this work OK on the HRII?
Want to make sure I've got it right before adding volts. :hot: I'll double check the resitors for setting the bias.... 10R or 100R?
Thanks for any guidance. |
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| Nordic |
Hi Rabz, my bad, still been too all over the place to draw up the new servo boards... will try to finish it by this evening...
But yes, the original servo has been tested on the HRII and works just fine..
well 100R and 10R would likely be usefull useing the larger one first to make sure no smoke flows, the ngo down to high wattage 10R... before power on measure the points marked servo+ and servo- and adjust servo trimpot until it reads 3k, this should put you in a safeish ballpark.
This is not realy adjusting the bias but rather the idleing current, I am still too dumb to get clarification out of carlos's posts what the actual current over the output resistors would be...
For my uses just setting the ideling current worked, if your sink is large enough go for between 1 and 1.5A. If it is too low, somewhere around 300mV, you will see the meter reading drop suddenly as the transistors switch off...
PS, DONT INSERT THE TRANSISTOR PINS INTO THE HOLES, just solder it flat, you will thank me if you ever need to remove the transistor from the boards...
Oh and I saw you used some realy high quality parts over there... |
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| destroyer X |
current... the colector to emitter current, you will be sure you have correct bias into those unit's bases...because without that no conduction from colector to emitter...so... as a result, when we measure voltage over some emitter resistance we are sure the unit is conducting, so, it is biased.
When you finish to adjust, measuring voltage over emitter resistances, into the power stage of course, you will have the optimized bias... the current will be around 50 to 60 miliamperes maximum into the positive rail.
You bias adjustment will "cause" current flow into the output stage... you will make the output drivers and power units start to conduct.... so... the "effect"...or the "consequence"...the result of your action will be output stage conducting...measuring the emitter resistance..over it...one lead into one of the resistance extreme and the other into the free resistance extreme, you will measure voltage.... and the voltage is the consequence of the current flowing...and this is what we want...to make output conduct...and if you install more than one output pair, this method turns even more important, to be sure that all them will be conducting.
If not biased into conduction, the audio will force it to conduct... and this will produce noises of switching into the transistors... into low level of audio you will have trash into the audio signal..spurious signals bothering the quality of audio... the unit will operate with the output in class B... that means ...no bias...no conduction... output transistors not working, switched off, no operating....cutted, non conducting... this is bad.... so.... check emitter resistances when you have them.... a safe check...or... adjust your amplifier ONLY, measuring there and providing 5 miliamps or less to each output transistor.
Class AB means that the output will receive some energy to force the output stage to conduct current... transistors are "on"... conducting current from colector to emitter.
regards,
Carlos |
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| rabbitz |
Thanks Nordic and Carlos.
I'm an amp dummy and only build, so all the technical jargon goes in and straight out. I need to have instructions stamped on my forehead. ;) OCD doesn't help.
Nordic... it's given me an opportunity to use up some of my go faster bits as this is my last amp, so anything laying around of suitable value is being used.
Hopefully should have it fired up in a few days. |
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| nogoodboyo |
YEEE HAAA!!!!
Boards arrived yesterday -- very, very nice!
And all the cool extras too! -- Thanks Nordic.
And thanks Ed and of course Carlos.
I will keep you all posted on my progress -- sadly I don't have a digital camera right now. Hmmm; my ex-girlfriend has one I can borrow, we are still friends. |
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| destroyer X |
each two hours you can call her.... i use the trick here...it works!
Ex is always a doubt... can turn a friend.... ethernal ex..or future girl friend.
Hummmmm... friends....maybe...hehe
Love is the big magic of our lives.... tell her, continuously that you love her... better than that...prove that.... call her to produce pictures... to inspect your appartment cleaning... to give opinions about each frame you put into the wall..... tell that she is a valuable friend... tell that you do not bother is she wants to have a new boy friend...say that you do not bother..you just want to "kill" him.. even beeing just a little.
I had three marriages.... thinking to go to the fourth.... 93 girls friends from 18 to 25 years old.... i have learned a lot.
When she perceive you decided that she is "really" a friend..she will try to change that sittuation.
Women is very strange...do not follow logics.... follow your heart..better chances with her.... need a lot of patience... and never give up... nature is showing us how to get them (girls)..never give up... go clearly showing your interest... mixed with some losses of interest too (ahahahah).... have to adjust bias slowly.... to check off set... to return and to measure all VBEs... have to wait to see if you have bias temperature drift.... with women is the same..... maybe they are transistorized.
Maybe you have finished with the relatioship (bad business..if not have another love... to replace by nothing is bad business)..... but if she try... she can catch you once more...twice more..or for ever if she was competent.
They love to be loved.... be very ridiculous.... go to her feet... this works..worked all my life...and related that i was very sucessfull....over your knees man!
Last week i invite my ex wife to inspect wall papper into a nearby hotel.... was great!.... but i do not remember the wall paper colour.
regards,
Carlos |
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| Francois G |
We have some suggested modifications in the treble enhancment circuit and I would like to make sure I understood correctly:
| quote: | Originally posted by destroyer X
You can reduce those 470 ohms to lower value.... even to 100 ohms if you prefere... also the parallel capacitor can go to 22N or 27N and will work fine.
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Carlos, I think you are referring to R7 and R21 in Nordic's "official" schematic. Do the changes you suggest provide better sound than the 470 ohm resistors and 100n capacitor's? What parts should we order?
Nordic suggested changing R18 and 19 from 390 each to 200 ohm each. I prefer my amp to be neutral (no treble enhancement). Could I just use one 400 (or existing 390) ohms resistor and jumper for the other with no capacitor? |
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| Francois G |
It should be R18 and R20 in my previous post not R18 and 19.
Apologies for the mistake.
Francois |
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| destroyer X |
source... your prefered audio source....you will see if will need to increase one of them, or decrease.
If your audio source was too much for the power amplifier, too much level, distorting at less than half volume...then increase one of those resistances... they are in series..so... 390 plus 390 this means 780 ohms total..... you can increase to reduce the amplifier sensitivity.... only when you have already distortion when your pré amplifier (or other audio source) start to saturate your power amplifier with half volume or less than that... distortions cannot start with less than 75% of the volume knob .... you may have 25 percent of the range starting some distortion to allow you compensate some music that has naturally less audio level.
Of course...the opposite can happen.... you can put all volume into your pré amplifier, or other audio source and the amplifier do not start to distort..also not reaching maximum power...then you have to reduce those resistances..one of them....or both of them..this will increase your sensitivity.
The 15N capacitor, the treble booster was used because i like...because i had speaker with bad treble...not so loud.... because of that i included...but really not needed in many systems..depending your speaker and home furnitures....you can use it or remove it...make a test using it and remove it to check if you like.... dessolder only one side to test that.
The phase advancing system, idea from Sansui, really sounds excelent, increasing some brigth into high frequencies...but...can produce harshes if your audio source program (type of music) already has enormous quantity of trebles, in special high end trebles (from 8 to 14 Kilohertz).... you can use Nordic suggestion that will work fine...will be more neutral....or even remove the capacitors C12 and C14... also you can decide the resistances R7 and R21... they can go from 100 ohms to 470 ohms...your choice.
If you do not want to decide those things...if you prefere to follow our instructions ..follow Nordic indications and suggestions, because he have tested, also using many speakers and he is someone i can trust and you too.
regards,
Carlos |
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| destroyer X |
...source... your prefered audio source....you will see if will need to increase one of them, or decrease.
If your audio source was too much for the power amplifier, too much level, distorting at less than half volume...then increase one of those resistances... they are in series..so... 390 plus 390 this means 780 ohms total..... you can increase to reduce the amplifier sensitivity.... only when you have already distortion when your pré amplifier (or other audio source) start to saturate your power amplifier with half volume or less than that... distortions cannot start with less than 75% of the volume knob .... you may have 25 percent of the range starting some distortion to allow you compensate some music that has naturally less audio level.... you should keep this room to increase volume if needed.... so...adjustment using full volume will not be perfect, as "one day"... you will need more volume and will not have it.
Of course...the opposite can happen.... you can put all volume into your pré amplifier, or other audio source and the amplifier do not start to distort..also not reaching maximum power...then you have to reduce those resistances..one of them....or both of them..this will increase your sensitivity.
The 15N capacitor, the treble booster was used because i like...because i had speaker with bad treble...not so loud.... because of that i included...but really not needed in many systems..depending your speaker and home furnitures....you can use it or remove it...make a test using it and remove it to check if you like.... dessolder only one side to test that.
The phase advancing system, idea from Sansui, really sounds excelent, increasing some brigth into high frequencies...but...can produce harshes if your audio source program (type of music) already has enormous quantity of trebles, in special high end trebles (from 8 to 14 Kilohertz).... you can use Nordic suggestion that will work fine...will be more neutral....or even remove the capacitors C12 and C14... also you can decide the resistances R7 and R21... they can go from 100 ohms to 470 ohms...your choice.
If you do not want to decide those things...if you prefere to follow our instructions ..follow Nordic indications and suggestions, because he have tested, also using many speakers and he is someone i can trust.
regards,
Carlos |
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| nogoodboyo |
Carlos,
Thanks for the love-life advice. Wow! you have a lot of experience. ;) .
But our relationship is ended now and will not start again, she is a close friend though and she is a very sweet person. She loves my dog and visits to take her on walks and to feed her, so I see her a lot.
And no, I don't have a girlfriend now. I am kind of happy not to -- spend time with friends, keep life simple and not-stressful.
Maybe you can make some income giving love advice. :D |
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| Greg Erskine |
| quote: | Originally posted by rabbitz
I'm an amp dummy and only build, so all the technical jargon goes in and straight out. I need to have instructions stamped on my forehead. ;) OCD doesn't help. |
I don't believe that for a minute. :D You have built more "completed" amplifiers than anyone I know.
regards |
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| Nordic |
Just to chime in, the high frequency boost is switched on and off with the jumper pins at the centre of the board......
Default is with the jumpers open... (you can store the selector by placeing it over pins marked 2 and 3 - as 3 is not connected), if you don't intend useing the HF boost ever, you don't even need to install the 15nf cap... to activate the HF boost put the selector between pins 1 and 2 (marked on the PCB). So you can switch between HF boost and not without soldering.. you could even connect a switch on some wire to the pins...
I feel that I have tested the amp with a large enough range of sources to stand with my suggestion of changeing both 390R resistors to 220R. |
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| destroyer X |
life is also very common to all places..... i wish you the best... and this is the feeling we have during the gap time between girl friends... a season feeling.
World is a big village... women are lovely and strange everywere too.
regards,
Carlos
................................................................................................
Rabbitz
I also have not agreed.... i do not believe a single word about that... you are skilled.... humble enougth to ask advises ...but skilled.
A "monster" related knowledge about speakers, about acoustics... you are the "living Encyclopedia" about those things... we need that book... we have more 30 years of life... you have time to produce the book.... please, put my name on it saying thanks because i told you should left that contribution to mankind.
No only our family, the people we left in earth, but books we left can make us ethernal.
regards,
Carlos
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Nordic
So.... you have tested using many sources and concluded that 220 ohms resistances (result is 440) worked the best.... so.... we can use a single one (if prefer to remove the treble boost, or deactivate, or not switch it on) a single unit from 390 to 470 ohms and to fill the other resistance gap using wire jumper.
Well... those things are personal decisions.... that "customization" we all love to make into our own constructions.... and we are the ones to do those things.
Was offered a working and tested idea, but will not fit all desires...be free to tweak and inform the advantages to us...please!
So.... we have a good feedback... and we can use that value as starting value... a standard value that can be adjusted latter if needed.
Also the input condenser dear Nordic, it can be increased as new standard value, you concluded that bass turn better with 8uf...so... the new value can be introduced into the schematic..it is ours...... a nice black gate condenser will be great.... and two black gates, connected to form a bipolar will be even better.
People say that we need weeks to burn the condenser...hehehe..i prefer not to put fire on my parts... the outside plastic cover can melt..ahahahahah.
Well...i felt those things funny because i have my old and good condensers...maybe they are already "burned" by long use...maybe those things works...we never know.
The High Resolution sounds great in my point of view.... very precise into trebles... a very good amplifier..... BUT.... do not reproduce the "thunderstorm" bass we have into the Dx Standard....for sure it is less loosen, more defined, more precise, more correct..but not so intense, not so deep.... not the Devil's hammer hitting the planet Earth surface..... i continue to feel that the Standard is very nice into sonics too.... not that precision into sound reproduction, but very nice.
I would be happy to listen opinions about that...the ones had both... what they feel related one and other...please...let me know what you all think about.
regards,
Carlos |
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| destroyer X |
Soon will land in Brasil (December 17 th).... and Brazilian excelent internal mail will make it arrive my place 18 early morning before 10 O'clock...for sure.
Thank you Nordic, and also Duda by the help.
regards,
Carlos:hohoho: :hohoho: :hohoho: :hohoho: :hohoho: :hohoho: :hohoho: :hohoho: :santa: :santa: :xmastree: :xmastree: |
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| Nordic |
| Here you can see the HF selector pins, as you can see our friend put it over pins 2 and 3... these slector parts are included with the PCBs |
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| destroyer X |
Rabbitz made a very pretty construction....parts colours... part's selection was great.
Are those parts from you Nordic?
beautifull job!
regards,
Carlos |
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| Nordic |
| No, it is his own parts, the selector which is indicated with the arrow is supplied by me. |
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| destroyer X |
Also he is excelent using photo machine.
The guy is humble but skilled in many things.
regards,
Carlos |
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| rabbitz |
| quote: | Originally posted by Greg Erskine
I don't believe that for a minute. :D You have built more "completed" amplifiers than anyone I know.
regards |
Build.... yes, understand.... no.
I really need instructions like Hugh supplies with the AKSA as I do not get it at all. For some reason I am unable to come to grips with electronics. Start talking mA, mV, ohms law, VBE and I'm lost. Takes me ages to even work out a dropping resistor for an LED so there is no hope for me, but build to instruction is fine as I am very methodical and have perfectionists traits.
Now speakers... I can handle them as it's mostly physics so us Neanderthals can understand. Crossovers don't need electronic knowledge just common sense, good software and a good ear. |
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| rabbitz |
OK Carlos.... I'll see your 93 girl friends and raise you 20 more girl friends. HA... I wish (only dreaming). ;)
I don't mid a bit of colour on an amp PCB but most caps will be black and gold I'm afraid with a few green caps thrown in as I had some here... they finally get a home. |
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| destroyer X |
rigth now i receive, by mail, the information i won 1.35 million pounds from Irish Lottery.... and it is into Scotland bank....ahahahaha.... those things are funny.
And that is already in my name!!!!
ahahahahhha.
Well..... of course a trick....... but if my dreams comes true.... you will be part of my dreams...first movement, after receive the gold, will be to visit you in Australia... and Dx Corporation will really turn alive as a real thing.
All my friends employed.... i think 1.35 million pounds may be enougth to start a small business.
ahahahahahha.... dream is lovely...but really i have received those tricks by internet.
Sterling, as i could discover, is not a legal money..do not exist anymore...only GBP... Great Britain Pounds i think is the name.
regards,
Carlos |
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| destroyer X |
He will send fax messages and will go to the bank to check that story.
Of course may be fake....but a good idea is to check..... 1.35 million pounds is not something to left go without check.
Also i am already in contact with an old Interpol agent to give them a visit..... kind visit if possible..... the computer that sent the message had the IP number already saved ... now is to start tracking.... will be done from London.
regards,
Carlos |
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| RKH |
Many thanks to Carlos, Nordic and Ed LaF. for the efforts to get the DX HDII to us DIYers. My package arrived today! Wonderfully packaged and labeled.
:)!Thank you very much! :)
Ryan |
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| Bearman |
Mine arrived too. Nicely packaged! It must have been a tremendous amount of work Nordic.
Thanks to Ed for being the front man here in the states.
Thanks to all involved. Time to get to work now! |
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| destroyer X |
So many folks talking about Nordic's wonderfull package.
Mine gone to Duda..... and this is because Brazilian customs, worries Duda will have in advance related the day will arrive here, will make him dismount all packages to make custom's officer believe all parts are old and used...he will remove, because needed, all those packages and details that can make customs officer think the goods could be for sale.... because new, organized and inside pretty plastic bags...shinning and looking as new things.... and new things can be goods to business...to be sold.... and this is danger!
Duda is sending me hundreds of lovely resistances organized in papper cartoon things....my God!... i hope he find time to dismount that thing..if not..will be blocked by "Aduana"..by "Customs".... if old...if used.... have to be dirty, non organized..cannot be shinny as new goods for sale.
For sure i will not see Nordic's package.... and i really feel some envy about that.
But also i will receive a lot of gifts that will arrive together the boards.... this will compensate the losses not to watch the perfect package Nordic made.
Someone could post pictures of this beautifull package...this way i could see it and would make some advertising about Nordic's packages.... i think Nordic will go ahead with more products, some advertising, some propaganda may be nice for him, for Dx Corporation and for all of us.
You see...the speaker protection.... near future the big power unit with many transistors into the output.... other boards can be produced and distributed by Nordic..... to show his quality of work is a very good thing.... at least i think this way and i strongly suggest you folks to cooperate with "Nordic International Interprises"
regards,
Carlos |
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| destroyer X |
And i cannot see them!!!!
I will scream ..... Aaaaaaaaagh!
regards,
Carlos:bawling: :( :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: |
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| Greg Erskine |
| quote: | Originally posted by destroyer X
Damn!.... a lot of folks talking about Nordic's package.
And i cannot see...
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I for one, am not interested in looking at or talking about Nordic's "package". :D |
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| dudaindc |
Carlos,
You will receive Nordic's components in a "stamp covered" envelope EXACTLY like he sent (less my parts), so you will have the same "opening pleasure" others had.
You mentioned before that Nordic's surprise gifts for you should not be revealed... and they will not. The package is already in my suitcase - sealed.
Please note that only the "contributions" from me will be "concealed to avoid the inquisitive minds of Customs agents".
These items will have to be re-packaged before sending to you in order to avoid damage (over 5 pounds).
Thus, I will be able to send Nordic's envelope (via Cedex) immediatly after going through Customs. My stuff will take another day or two.
Back to work.
:Popworm: |
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| Nordic |
| Sadly Carlos, your stuff isn't neatly packed, I tried to cram as much stuff into the envelope as I could..... |
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| destroyer X |
Thank you Duda.
This may be something alike 2.5 kilos!.... yesssssss!
I see you are really busy, not finding you into MSN anymore.
But i could talk for long time with Hugh into Skype...he is having new ideas.
regards,
Carlos
................................................................................................
I am still curious about your package Nordic
I am curious....maybe some plastic bags... maybe have used printer to make stamps ....hummmm... some plastic with bubbles... some styrofoam pieces around......i can imagine some
small card boxes with resistances inside not to bent leads...people was impressed... and they are from the country were the best packages born...injected plastic and nice things came from Beautifull United States of America... and they were impressed...so...you have made so good or better than they use to see there...into their homeland.
Also i know your wife use to help you with that stuff...was you or was your wife that made the excelent package people have commented?
Buaaaaaaaaa!....i could not see that!!!!
:bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling: :bawling:
regards,
Carlos
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Hey Greg.... in Australia you already have one of the best packages i could see
That one with waterproof paper, ligth grey nice envelope... middle sized one (smaller than A4 paper, the printer papper, office papper) with another envelope made using plastic filled with air bubbles... this inside protection envelope is glued into the outside paper card.... the paper card is thick and have waterproof cover...man... that one is almost perfect... you have send me one, and Hugh also sent me extra boards and drivers 4 times.
I think i still have your envelope and Hugh envelope too.... i was so happy that i decided to keep envelope as a remembering of you and Hugh.
Australia is really nice.... one day i will land your place... i hope i will do that one day.
regards,
Carlos
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A good morning for everybody.... a hot day is coming... see picture.
regards,
Carlos
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| Nordic |
| I'm glad I didn't see Greg's package either :D |
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| destroyer X |
Feeling jellows i think...about you...hehe.
Jellows but in a kidding way.
regards,
Carlos |
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| Nordic |
| Lol carlos, when we talk about a man's package it refers to the bump in his pants... |
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| maxlorenz |
Hi DX, Nordic and folks,
Dear DestroyerX, I am curious about a couple of things that maybe you could answer...while waiting the "package".
Having all those nice sounding amplifiers around, do you actively multi amplify your speakers?
I bet you can build a sweet active crossover with discrete parts ;)
This topic gets hot here from time to time, and I know you have a restless, hyperactive mind that loves intellectual challenges :angel:
...apart meeting people...which leads me to the second query:
Were you born with the sun in Gemini? Confess!
:D
With love,
M
PS: and THANKS to both of you for the opportunity of building a "real" amp and possibly learn some practical electronics, which, otherwise would have been very difficult. |
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| Nordic |
| I'll confess, I'm a gemini in the truest sense of the word... |
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| destroyer X |
Thank you Maxlorenz..... it is positive to help others... if i could i feel that i am cooperating into mankind.... making my part into the system.
They are having fun with me Max..... package for them..for Aussies, is that thing....you know.... the third leg in our language...they are having fun...
ahahahahaha..
no problems.... i will find another word....hummmm..... i will search another word into google.
Big package..small package..pretty package and my lovely Aussie friends are falling down from their chairs laughing because of me....you know.... i like that... i love them so much that i feel good to make them laugh.
Greg Erskine is a dear friend...he can mess with me.
hehe
Carlos |
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| Nordic |
Max I will phone the post office for you on monday, I am allready aware of one parcell that went via seamail, even though I paid for airmail. The seamail takes 8 to 12 weeks :(
It shows Chile on the Tracking form so it may be at your customs or Chilean postal service, you should be able to trace it through your local post office useing the South African tracking number. |
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| maxlorenz |
| quote: | | I have born July the sevententh.... 1951 |
That makes you a Cancer (like my second daughter), a family man which smiles even with his eyes, and that want that all the globe becomes a big family, with warm feelings for each other...yeah, that agrees with your speech. But I'm sure you must have Gemini influence...send your birth hour if you know it and I'll use some net resource to find out.
| quote: | | I'll confess, I'm a gemini in the truest sense of the word... |
That's OK, don't feel guilty :clown:
I see now why you are so fast.
You must give a rest to your neurons from time to time ;)
About the parcel, I'm not worried: we had a customs strike weeks ago and some parcels were delayed.
Sorry for the big OT: I'm dead tired and can't control myself :angel: |
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| destroyer X |
to have importance to me.
Family is the most important thing.... and our sons are the best thing we can have in our lives.
You are rigth
I have born 23:45.... near midnigth...ending the July sevententh
regards,
Carlos |
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| destroyer X |
I am completelly crazy by my daugthers.
regards,
Carlos |
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| maxlorenz |
I believe you! I have three daughters and one little son.
I adore them but sometimes they drive me crazy :D (specially a little Scorpio that I have...)
I was totally wrong!
Proving how a bad beginner I am at those things...not a trace of Gemini!
BUT hey! Look what says at the first paragraph of the free chart:
<< Mercury in Leo
You are a person with strong opinions which expresses them in an energetic and sometimes dramatic way. You are an entertaining speaker and will adorn or exaggerate to transmit your message. You have an aptitude for acting and story telling. Even if your setting is only a class room or your dining room, you give a good spectacle.
You have an abundance of creative ideas and won't enjoy any job that would not involve creative participation.
You can be a good politician, spokesman, group leader, director or coach.>>
It is my translation so it can have mistakes, but you take the general idea...
Strange things happen beneath the skies...
YGM
Best regards,
M |
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| destroyer X |
I am interested in those things.... i love Astrologic things, UFO, Roswell tales stories.... and i am Spiritualist (Alain Kardec)
But this is of topic, and Nordic will complain if i continue with that..so...i will stop here.
Thank you Max...i am still visiting the site you have suggested into direct mail.
Not a good politician.... when i do not like the person i use to say clearly and direct into the guy's face... this is not a good behavior to politician... they never do that.
regards,
Carlos |
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| Nordic |
If a suitable translation is available look for a copy of The human pin code... facinateing and scary accurate... to the point where I'd rather say you are mistaken about your birth date than suspect an erroneouos result.
If i have a few minutes I will do carlos's tommorrow and send it to him as it tends to reveal the good and the bad, our nature and motivations when things go well and when they don't...
It is wonderfully zen as it also just gives these two lists of characteristics, for instance it may say you lie alot, (just an example) your lesson would be to learn to be more honest and this will likely be the key to unlocking other catch 22s in your life... |
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| maxlorenz |
| quote: | | But this is of topic, and Nordic will complain if i continue with that..so...i will stop here. |
But you see that he also loves these strange things :angel:
...restless mind...
It is to our other mates that we have to apologize... |
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| destroyer X |
He send me many pictures.
My curiosity was satisfied.
Dear Nordic could not produce pictures because his photo machine is moved by steam power....have to wait hours to reach the correct operating temperature...because of that he did not have produced images...ahahahahha
Not really true... he made one and i have it.
Nordic bougth the digital camera as a weigth to paper...he do not produce pictures.... it is used to avoid the wind to mess with his pappers..ahahahahahah!
regards,
Carlos |
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| lgreen |
Hey there, just getting going on my amp now that the snazzy boards are here.
Check out the attached pic, will be using a 330VA (dual 25AC Secondaries) transformer, 4x 15,000 uF 63V caps and ... what do you think about the heatsinks?
The big one is 8.25 W x 2.5 thick x 5 high (inches)
The smaller one is 8.25W x 2.5 thick x 2.5 high (inches).
To me, the big one looks way to big and the small one seems a little small. But only 2 output transistors per channel it would seem that the small ones would be fine or could I scale this up?
What do you all think?
EDIT- FYI, the case is an old Onkyo TX-2500 Mk. II receiver that I saved from the dump. |
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| Nordic |
I would say mount the large sink on the rear, it would still leave space for wires and connectors, then the next amp and sink, and the tranny/PSU at the front....
ah i see its not the rear.... the side at the top of the pic, stupid me... |
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| destroyer X |
I have checked, and heatsinks are perfect to the work they will have.
The bigger one will be good to hold a 100 watts RMS amplifier, continuous power, sinusoidal wave.
The smaller one around 60 watts RMS amplifier, continuous power, sinusoidal wave.
If you put them together, using two aluminium plates fixing them together and distributing the heat (not very well.. have delay and will depend of how big is the aluminium bridge contact area)...maybe 140 watts or a little bit more.
I am talking as output power, not power consumption,
Your amplifier will produce around 40 watts RMS over 8 ohms.... the total power will be 80 watts of audio power.... and your heatsink will be able to hold amplifiers till 140 watts of audio power.... so...you will be happy with them if use 8 or even 4 ohms loads.
I hope you have holes down and up the case.
regards,
Carlos |
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| lgreen |
Thanks for the info.
I guess I was not clear (as usual). I hope that I can use two of the smaller ones, one per channel, if that is acceptable.
Yes, the top of the case has nice grills/openings/vents, but the bottom could use a few holes. |
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| destroyer X |
Two small ones will work fine.... they will be exactly the needed size to 8 ohms.
Merry Christmas Mr. Green.
regards,
Carlos |
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| destroyer X |
And a nice stock of parts to my own use too... very good ones.
Heatschrink tubes and a lot more things.
I am very happy... thank you Nordic, and also Duda that have sent me 2 thousand resistances and a Multimeter
Pictures with details you can find into the Dx amplifier thread.
regards,
Carlos |
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| destroyer X |
He works in Washington.
The picture was in Amsterdam - Holland
regards,
Carlos |
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| destroyer X |
Nice family..... handsome people.
Dx crew is this way.... people is handsome... coincidence... but if you observe... the are all pretty people.
Nordic wife is not only pretty... she is beautifull.
regards,
Carlos |
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| salesmonster |
Nordic:
Back in post 411, you show prepping the transistors with the heatshrink. Just what is the purpose of joining the transistors this way? Is it critical? (Someone may have followed the silkscreening without noticing that step :ashamed: ) |
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| Nordic |
Its not critical, but in theory is better.
The two transistors idealy have the same gain
But the gain varies as the temperature does... so in order to have them track each other thermally and keep gains closer to each other over the temperature range, we connect them like that. It will only affect DC offset a tiny bit if I have to guess.. |
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| destroyer X |
RAJ boards (Bora design) and Roender amplifier... also an amplifier from Hugh Dean that will arrive soon.
About the Hugh Dean one, is not something from his line...just some prototype he made and not decided to put into production.. ...he has new ideas even better.
regards,
Carlos |
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| Nordic |
Lol, I wouldn't mind being un Hugh's Christmas list :P
P.S. Carlos you were the last one to confirm receipt so far, yet you seem to be the furthest in building...
Your daughter must be proud of her daddy's name on the boards?
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| destroyer X |
Hummmm... daddy is important!.... she said smilling.
I said the guys that are constructing are important to me too...so...this is a nice agreement...i am important to them and they are important to me....deal made!
And she asked... and this Nico Daniel.... Daneel!... is that Nico that beautifull one?... the guy into the picture you show me?
I said...yes!...but his wife is beautifull too!
She said:
- "Do not want to play anymore!"...ahahahahha
regards,
Carlos |
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| salesmonster |
I spent my leisure time today figuring out what parts I need to order from Mouser to complete my amp boards as well as my power supply boards. Since I put the time into it, I thought I could share.
I have tried to check and double check that the footprints and specs of the parts are reasonably close, but please don't go and place an order without verifying my work, it's just a starting point. And please, let me know if you find any mistakes! I hate ordering parts more than once, too!
The quantities are for one board of either assembly.
Happy Holidays!
:frosty: |
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| Nordic |
I would add to the list 2 10W 10R resistors, for adjusting idleing current.
Also maybe 100pf cap to try and switch with 150pf, if the larger prooves stable...
Also the cog caps would idealy be replaced with silver mica... |
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| salesmonster |
Nordic:
Cool! Thanks for the input.
I added the dummy load, as well as the optional lower value for C21. As for the Silver Mica, I added a footnote giving ideas as to where to find them, they seem to be out of favor with Mouser and Digikey.
:deerman: |
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| Nordic |
| I saw some with reasonable price on ebay, the catch you need to buy a box full, I might get them in the new year for the website and offer them as part of an upgrade kit. |
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| billabong |
Nordic has updated the preferred value of CIN to be 4.7uF to 10uF. He is currently using 6.8uF. Carlos suggests using a non-polar electrolytic, preferably Black Gate, or alternatively two polarised caps connected back to back.
Audie. |
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| Nordic |
| Yes, I too have on occasion been surprised at how good a cheap old NP cap can be in this position.... as long as you don't tell anyone. |
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| t-head |
Pardon my ignorance, but as this is a first ever build, I need a final, no more changes, BOM of all materials needed to build this amp. Also will there ever be a list of suggestions for steps and proper order of propagating boards? Each time a post describes changes to cap values etc, my level of frustration rises yet again.
Cheers, tea |
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| Nordic |
HI T, I am so sorry for causing confusion, I suppose as one gets a more modular view of the amp, little directions relating to component changes are easy to comprehend, and sometimes even plain obvious... but only once you can see the tree from the forest.
As is, the default schematic and component list will work just fine.
It may have a little low gain for some sources, so we suggested you change the 390R resistors to 220R.
The other modification is on the input capacitor, Cin, in which values larger than 4.7uf are suggested to not roll bass off too early.
See this post
http://www.diyaudio.com/forums/show...098#post1372098 |
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| Family_Dog |
Nordic,
I recently came across this thread as a kick-ff in another forum.
Having no desire to read through the previous 500 posts (I did read through some of them though!), I would like to put my name down for a Group Buy, but I gather the next Group Buy, as the first one is surely sold out.
Please forgive me if I am repeating myself here, but there are far too many posts to wade through here... is there a specific case available for the stereo amplifier or are these available locally somewhere in SA?
Can I effect payment through EFT in ZAR prices? I do not want to convert from US$ prices (for obvious reasons!!) if it is not necessary for local purchases.
-Eric |
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| destroyer X |
And i do not think that one was really a forum...it is more a Prison Institution..all the bad folks banished from DIY audio, our forum, are there burning their back bumpers and complaining one each other, figthing, beeing rude, calling us "that other forum"..ahahahaha!
Poison, revolution, frustration, bad education is there.... that forum is usefull, as it is the trash box from this forum.... everything that do not serves for us is sent there.
I have not sad, we cannot say, the other forum name....not to make personal attacks..having not adress, not one is beeing attacked... do not tell also too much details.... not saying those things we will just talking about generic things that happens in our world, not producing political attack.
Because if we say names we will enter the forum rules and Carl Weldon, crying because of me..he likes me too... will shot us between the eyes and very fast.... the fast and fair moderator..also Pinkmouse is around...and this one is fast with the trigger.... (will kill you first..than i will accept apologises..ahahaha.... but he is fair too)
"Drop the finger" moderator has a good radar too...he do not accept excesses...good work too.
Planet 10 is a sweet guy, i cannot believe Halojoy had problems with him.... strange, he is fine!..... the guy is perfect to be a good daddy..seems to be a good family man.
Sy has knowledge... a lot of theorical knowledge and good to meterings also..has important friends in this forum and a very good man too.... knows how to take care of his family and how to make pizza.
There are others good moderators too.... yeah... Variac is fine too..all them are good... no bad ones here.
Chris is a good friend... excelent man...decent, fair, honest...nice guy.
I think you will be happy here my dear friend.
regards,
Carlos |
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