I hate automotive sound culture... BASS BASS BASS BASS 
Sometimes you can see a car that it's value is a half of the sound system...
Sometimes you can see a car that it's value is a half of the sound system...
Hi nando,
Some young bucks go for SPL others fo SQ, and many of them spend thousands on their audio to attain very high quality.
Boom-boom can be heard from many home stereo systems if theses are played loud as well, its all down to the car/room becoming a re-radiating pressure chamber.
Sounds like in Brazil the car owners get away with showing off, whereas here the driver would be prosecuted for nuisance.
Ever heard a convoy of ICE enthusiasts driving past - all maxed out to the same FM pop music station !
Cheers ......... Graham.
Some young bucks go for SPL others fo SQ, and many of them spend thousands on their audio to attain very high quality.
Boom-boom can be heard from many home stereo systems if theses are played loud as well, its all down to the car/room becoming a re-radiating pressure chamber.
Sounds like in Brazil the car owners get away with showing off, whereas here the driver would be prosecuted for nuisance.
Ever heard a convoy of ICE enthusiasts driving past - all maxed out to the same FM pop music station !
Cheers ......... Graham.
Yes Graham....and hello Nando!.... we are needing here some laws and education
Yesterday was a hell in earth here...another noisy guy parked his car down my building and had opened the rear.
Down the text you will have comments about the DX amplifier..now some comments...some social relations as we are humans.
The most awfull music was playing there....the one was invited by someone of my building...and before 22:00 hours no one can complain.... all the afternoon he was playing loud music, and screaming to be heard talking with the invitation family that received him.... i was happy when darkness came....so...the one that wanted to be seen, to be watched, to be important (ridiculous guy) was covered by the darkness...having not more chance to be "important" (annoying in my point of view), as darkness could not enligth that "enourmous microscopic figure" then....he gone.
People here, not my own people related culture Graham, i came from French town, Rio de Janeiro (thousand miles at south direction) was "civilized", or "dominated" by a french invasion, and the culture there is a little bit more "responsive" related the unlimited freedom we have in Northeast...people here dance in place of complain....they contribute to the mess and say about themselves that they are extremelly happy (hummm..i do not agreed...alcohol is there all time long..fake happyness.moved by alcohol in high levels in the blood)...if in another place in this country...more into south direction...for sure, a lot of people will go down to ask him to reduce the volume.
Here, if you do that, people will watch you alike an extra terrestrian...and you have the risk not to succeed...if you call police they will say that now law was broken...and you will be in hard problems to make the one reduce the loud sound... they will feel even more happy with the informs they are reaching distant places with good sonic pressure....grumpf!
Also Public adress are disturbing too much my place., audio adventising run hard during weekends... in monthes i will move from my rich place to another inland building.... a less rich place will have less bother guys as they love to stay drunk in front of the beach doing foolishes.
Even inside home, glasses shutted, curtains closed, those sounds compete with your television and normal conversations...and those guys normally thinks that they are giving us a "gift" producing that mess....they had no conscience how annoying they are advancing the volume so further.
Life is beautifull here, despite of those guys....needing laws that for sure will come, as this is turning very common around this country...and this is a small problem..... we have others that are bigger than that...reason why, law makers response are slow in speed.
DX AMP is a very kind amplifier that can work even with junk parts...you will need to respect only the voltage limits, current limits, some small gain may be needed..hummm, more than 50 will work fine.... the speed is not "that" problem, as Dx amplifier, a very kind amplifier, will reproduce music inside the audible range, not producing harmonics to disturb your cats , or to confuse Bats flying around.
Using 35 volts, almost all audio transistors will fit...some current will be needed at the output.... 5 amps transistors will work fine...under 8 ohms, even 2N3055 and 2N2955 will work there...also TIP3055 and TIP2955 and other Tips transistors too.
Dx amplifier can work with 2N transistors, 2SC transistors and 2SB transistors.
Also it has suggested transistors, beeing the more adequated ones those ones you have in your junk box...a very flexible design that do not need you to follow instructions in details.
Also, can reproduce good audio without Platine silvered Brica, tube tuned low loss high stable precision golden stripped capacitors.
For your board, golden plated lines will not be needed and it is the only one that can work without holes to screws in its board...it sound good, even not beeing pretty and expensive.
Sorry folks, today i am beeing a little big sarcastic, or maybe a little bit cinic ....i had not a good nigth....very nervous because that powerholic down there.
regards,
Carlos😡
Yesterday was a hell in earth here...another noisy guy parked his car down my building and had opened the rear.
Down the text you will have comments about the DX amplifier..now some comments...some social relations as we are humans.
The most awfull music was playing there....the one was invited by someone of my building...and before 22:00 hours no one can complain.... all the afternoon he was playing loud music, and screaming to be heard talking with the invitation family that received him.... i was happy when darkness came....so...the one that wanted to be seen, to be watched, to be important (ridiculous guy) was covered by the darkness...having not more chance to be "important" (annoying in my point of view), as darkness could not enligth that "enourmous microscopic figure" then....he gone.
People here, not my own people related culture Graham, i came from French town, Rio de Janeiro (thousand miles at south direction) was "civilized", or "dominated" by a french invasion, and the culture there is a little bit more "responsive" related the unlimited freedom we have in Northeast...people here dance in place of complain....they contribute to the mess and say about themselves that they are extremelly happy (hummm..i do not agreed...alcohol is there all time long..fake happyness.moved by alcohol in high levels in the blood)...if in another place in this country...more into south direction...for sure, a lot of people will go down to ask him to reduce the volume.
Here, if you do that, people will watch you alike an extra terrestrian...and you have the risk not to succeed...if you call police they will say that now law was broken...and you will be in hard problems to make the one reduce the loud sound... they will feel even more happy with the informs they are reaching distant places with good sonic pressure....grumpf!
Also Public adress are disturbing too much my place., audio adventising run hard during weekends... in monthes i will move from my rich place to another inland building.... a less rich place will have less bother guys as they love to stay drunk in front of the beach doing foolishes.
Even inside home, glasses shutted, curtains closed, those sounds compete with your television and normal conversations...and those guys normally thinks that they are giving us a "gift" producing that mess....they had no conscience how annoying they are advancing the volume so further.
Life is beautifull here, despite of those guys....needing laws that for sure will come, as this is turning very common around this country...and this is a small problem..... we have others that are bigger than that...reason why, law makers response are slow in speed.
DX AMP is a very kind amplifier that can work even with junk parts...you will need to respect only the voltage limits, current limits, some small gain may be needed..hummm, more than 50 will work fine.... the speed is not "that" problem, as Dx amplifier, a very kind amplifier, will reproduce music inside the audible range, not producing harmonics to disturb your cats , or to confuse Bats flying around.
Using 35 volts, almost all audio transistors will fit...some current will be needed at the output.... 5 amps transistors will work fine...under 8 ohms, even 2N3055 and 2N2955 will work there...also TIP3055 and TIP2955 and other Tips transistors too.
Dx amplifier can work with 2N transistors, 2SC transistors and 2SB transistors.
Also it has suggested transistors, beeing the more adequated ones those ones you have in your junk box...a very flexible design that do not need you to follow instructions in details.
Also, can reproduce good audio without Platine silvered Brica, tube tuned low loss high stable precision golden stripped capacitors.
For your board, golden plated lines will not be needed and it is the only one that can work without holes to screws in its board...it sound good, even not beeing pretty and expensive.
Sorry folks, today i am beeing a little big sarcastic, or maybe a little bit cinic ....i had not a good nigth....very nervous because that powerholic down there.
regards,
Carlos😡
Attachments
Hi Carlos,
Thoughts like a 'bucket of water' come to mind.
Where did that come from ?
There would not be any open cars here at the moment - its snowing again !
Carlos, I think that your amp circuit is useful because anyone around the world could try building it with whatever is to hand, including nails into a piece of wood as with the old tube 'breadboard' construction.
You could have choice of melamime, veneer, mahogany etc !
Even make as a wall mount picture panel !
Cheers ......... Graham.
Thoughts like a 'bucket of water' come to mind.
Where did that come from ?
There would not be any open cars here at the moment - its snowing again !
Carlos, I think that your amp circuit is useful because anyone around the world could try building it with whatever is to hand, including nails into a piece of wood as with the old tube 'breadboard' construction.
You could have choice of melamime, veneer, mahogany etc !
Even make as a wall mount picture panel !
Cheers ......... Graham.
Yes Graham.... will sound good if the base used to construction was made
using wood, card paper, MDF, plywood....painted, or with varnish.
The amplifier will sound excelent using copper nails..also will sound especial with the iron nails...using boards, point to point aerial construction...bus bars constructions...terminal bridges...using screws or even wire twisted around posts.
I can guaranteed that will sound good, despite the base you decide to use.
Also will sound nice in wall....inside some sound instrument..inside furnitures..everywere...hehe.
All rigth folks....not kidding anymore....observe the sketch my daughter made...with me as a help for her (10 years old).
The yesterday noisy guy...painted orange or yellow because "yelow guys" means "stupid or ridiculous guys" here.
regards,
Carlos
using wood, card paper, MDF, plywood....painted, or with varnish.
The amplifier will sound excelent using copper nails..also will sound especial with the iron nails...using boards, point to point aerial construction...bus bars constructions...terminal bridges...using screws or even wire twisted around posts.
I can guaranteed that will sound good, despite the base you decide to use.
Also will sound nice in wall....inside some sound instrument..inside furnitures..everywere...hehe.
All rigth folks....not kidding anymore....observe the sketch my daughter made...with me as a help for her (10 years old).
The yesterday noisy guy...painted orange or yellow because "yelow guys" means "stupid or ridiculous guys" here.
regards,
Carlos
Attachments
snowing ? 😱
It's raining here, so open cars are out of the question here too 😎
Second channel mostly assembled , op-devices fitted are mjl 21193/21194, VAS is bd243c
(hope it's 'in focus' now ):
The BIG picture is here:
http://i29.photobucket.com/albums/c272/aqvrs1853/P1040664.jpg
best regards,
Klaas
It's raining here, so open cars are out of the question here too 😎
Second channel mostly assembled , op-devices fitted are mjl 21193/21194, VAS is bd243c
(hope it's 'in focus' now ):
The BIG picture is here:
http://i29.photobucket.com/albums/c272/aqvrs1853/P1040664.jpg
best regards,
Klaas
Great Klaas...many thanks by your attention and kindness to produce a better picture
for my historical purposes....hehe....not so real purposes...i use to be kidding, this way life goes better with good mood.
Dear Klaas and other nice folks, in special the message is beeing sent to respectable Graham...old and experient guy, that may know human behavior better than i can.
Klass made his amplifier....Dx amplifier now has double guaranteed...Dx and Klaas is telling it sounds.
The next guy will say:
- "It sounds good"
The second;
- "It sounds very good"
The third:
- "It sounded spectacular"
The fourth:
-"Sounds incredible"
And so on...if the thread was keept alive for some monthes, i will ensure you this will happens.
Why?...because people do not wants to take risks...amplifier not famous..beeing pioneers, people do not want to talk too much not to burn their words into flames..
But as the group will increase.... responsabilities will be divided between them and courage will be multiplied by the number of constructive folks...you will see this happens.
There's always a chance of a bad mood one enter to disturb and tell some lyes...saying not good...sounding not nice...but people doing it...this chance will be reduced.
Belief, trust, and sells or god or some idea beeing passed as message depends of how many folks sign under...how many folks have constructed...and the propaganda made (beeing true or fake)
I remember someone that had the belief that heavy supplies produced enormous power (yeah..this can be true..almost all the time it is..but with some exceptions)....and the guy never had belief in his own supply.... that one powered a 16 amps drain, 13.8 Ham transceiver...and he told that voltage gone down...sligth losses of 5 percent (excelent supply).
We decide to make a joke with him...we have installed a stone inside....and we told this one is really good....HEAVY!...well...he runned to buy.... 5 times the price...we keep the money with us...a fake negotiation that had dead line time to finish....
He gone, with the heavy supply...ahahaha..sweating a lot...not one wanted to help him with the fear to start to laugh....and he used very happy, the same supply he always had...the same 5 percent losses...but HEAVY!....he told us that transmitter was better, that the painel lamp was not flicking...much stable...better audio reproduction..and that even his standi9ng wave ratio was
reduced because the supplies excelence.
Observe propaganda fellows...the way it works.
We return the money and we explain him what happened.... he insisted that the heavy stone supply was really better (pride...self defense mechanism that foll us)...we made testing...using loads...the same result.
He continue to say that the stone heavy supply was better..that he do not know why..but was better.
This is life folks...and Marketing too.
Dx not famous...DX amplifier not famous....if Dx turn famous, amplifier will turn heavy and excelent...ahahahahhaa.
Our propaganda do not works fine when we do it by ourselves...but if some "God"..alike Doctor Nelson Pass, because a little disturbed with some wiskie, and decided to construct Dx amplifier.... much more people will construct Dx amplifier...more than the folks have constructed Pass amplifiers...because everybody will have much confidence when he is talking about an other amplifier...not protecting his own products.
People is too much clever...and at same time...not clever enougth...i am included inside this group...i am human.... a "people"
regards,
Carlos
.....................................................................................................
Many thanks by the very good picture you have made Klaas.
Now you have respected the excelence of Panasonic Lumix products.
regards,
Carlos
for my historical purposes....hehe....not so real purposes...i use to be kidding, this way life goes better with good mood.
Dear Klaas and other nice folks, in special the message is beeing sent to respectable Graham...old and experient guy, that may know human behavior better than i can.
Klass made his amplifier....Dx amplifier now has double guaranteed...Dx and Klaas is telling it sounds.
The next guy will say:
- "It sounds good"
The second;
- "It sounds very good"
The third:
- "It sounded spectacular"
The fourth:
-"Sounds incredible"
And so on...if the thread was keept alive for some monthes, i will ensure you this will happens.
Why?...because people do not wants to take risks...amplifier not famous..beeing pioneers, people do not want to talk too much not to burn their words into flames..
But as the group will increase.... responsabilities will be divided between them and courage will be multiplied by the number of constructive folks...you will see this happens.
There's always a chance of a bad mood one enter to disturb and tell some lyes...saying not good...sounding not nice...but people doing it...this chance will be reduced.
Belief, trust, and sells or god or some idea beeing passed as message depends of how many folks sign under...how many folks have constructed...and the propaganda made (beeing true or fake)
I remember someone that had the belief that heavy supplies produced enormous power (yeah..this can be true..almost all the time it is..but with some exceptions)....and the guy never had belief in his own supply.... that one powered a 16 amps drain, 13.8 Ham transceiver...and he told that voltage gone down...sligth losses of 5 percent (excelent supply).
We decide to make a joke with him...we have installed a stone inside....and we told this one is really good....HEAVY!...well...he runned to buy.... 5 times the price...we keep the money with us...a fake negotiation that had dead line time to finish....
He gone, with the heavy supply...ahahaha..sweating a lot...not one wanted to help him with the fear to start to laugh....and he used very happy, the same supply he always had...the same 5 percent losses...but HEAVY!....he told us that transmitter was better, that the painel lamp was not flicking...much stable...better audio reproduction..and that even his standi9ng wave ratio was
reduced because the supplies excelence.
Observe propaganda fellows...the way it works.
We return the money and we explain him what happened.... he insisted that the heavy stone supply was really better (pride...self defense mechanism that foll us)...we made testing...using loads...the same result.
He continue to say that the stone heavy supply was better..that he do not know why..but was better.
This is life folks...and Marketing too.
Dx not famous...DX amplifier not famous....if Dx turn famous, amplifier will turn heavy and excelent...ahahahahhaa.
Our propaganda do not works fine when we do it by ourselves...but if some "God"..alike Doctor Nelson Pass, because a little disturbed with some wiskie, and decided to construct Dx amplifier.... much more people will construct Dx amplifier...more than the folks have constructed Pass amplifiers...because everybody will have much confidence when he is talking about an other amplifier...not protecting his own products.
People is too much clever...and at same time...not clever enougth...i am included inside this group...i am human.... a "people"
regards,
Carlos
.....................................................................................................
Many thanks by the very good picture you have made Klaas.
Now you have respected the excelence of Panasonic Lumix products.
regards,
Carlos
Attachments
Maybe you can run a "sharing" wire for this purpose
But i will tell Greg...in the future, all suggestions will be introduced into a last model board.
They will be small differences...input condenser size for instance...rail filter condenser position...maybe the option for a bias multiplier for the ones prefer this way.
But this will be made in some monthes Roender....your need will be there, in the last board model.
thank you by your help and attention... i am happy that Rumania is here too, represent by you Hoender
I am attaching one "feature" image.... a propaganda, advertising image.
The amplifier is not a professional product, it was not made for sale..i have no boards to sell or to give to friends.
regards,
Carlos
But i will tell Greg...in the future, all suggestions will be introduced into a last model board.
They will be small differences...input condenser size for instance...rail filter condenser position...maybe the option for a bias multiplier for the ones prefer this way.
But this will be made in some monthes Roender....your need will be there, in the last board model.
thank you by your help and attention... i am happy that Rumania is here too, represent by you Hoender
I am attaching one "feature" image.... a propaganda, advertising image.
The amplifier is not a professional product, it was not made for sale..i have no boards to sell or to give to friends.
regards,
Carlos
Attachments
The last model board may change to a square board...more used in our forum
Dimensions will be sligtly different, and Greg Erskine, an artist, as profession, will have freedom to do whatever he wants to do.
This will result in a better work related mine...i am a pig to do those things...and he can do much better.... even compared with non pig constructors, i think he can make better.
Here another idea about the output transistors...of course those chips (burned) used here for the model are not adequated for Dx amplifier...a model only. ....parts are there to "populate" the board...not for real electronic work.
"L shape" aluminiun is shown to transfer heat to a vertical heatsink surface.
regards,
Carlos
Dimensions will be sligtly different, and Greg Erskine, an artist, as profession, will have freedom to do whatever he wants to do.
This will result in a better work related mine...i am a pig to do those things...and he can do much better.... even compared with non pig constructors, i think he can make better.
Here another idea about the output transistors...of course those chips (burned) used here for the model are not adequated for Dx amplifier...a model only. ....parts are there to "populate" the board...not for real electronic work.
"L shape" aluminiun is shown to transfer heat to a vertical heatsink surface.
regards,
Carlos
Attachments
Good point Roender
This is why I used 'STAR' connections with my own amplifier, with a single central ground point at near the output end of the pcb with the Zobel going straight to it and the input ground plus all capacitor connections radiating from it.
Now that Carlos' amp is proved a runner it would be worth designing a 'Star' pcb for it. These are more difficult to layout but ensure best sound for the design.
Cheers ........ Graham.
This is why I used 'STAR' connections with my own amplifier, with a single central ground point at near the output end of the pcb with the Zobel going straight to it and the input ground plus all capacitor connections radiating from it.
Now that Carlos' amp is proved a runner it would be worth designing a 'Star' pcb for it. These are more difficult to layout but ensure best sound for the design.
Cheers ........ Graham.
No problems Graham..i will try to do your suggested star grounding.
If not possible..because of board room..i will put an star marking my ground because of you...hehe...kidding..will be possible, of course.
I was remembering , Mr. Roender.... the idea, in the beginning of the tread...also in the former thread that produced this one (Simple amplifier) was to remove everything that was not "sounding"...things, when removed, made not difference to sonics perceive using audition tests (young kids helping..they have no preferences and they do not lye....also do not try to discover what you want them to tell you)
And this way; emitter resistance gone....VBe multiplier gone...output coil gone (but this is dangerous, depending the speaker may be needed)...also the input rail condensers were not "sounding" enougth to be keept there...near the output colectors...i found that even a 100N were working fine there.
This made me suggest Greg to exclude, or to let as "optional" those rail condensers...people can use them running wires or not use them.
In the future, some modifications will be done to make friends happy, in special suggestion that came from constructors or "quasi" constructors.
That preference will be posted here, because we have the "suggesters audiophiles"..those suggest...suggest...suggest and do not construct nothing.
Also, there are the re-designers..they redesign everything they see..also do not construct nothing.
There are the "simulators"..those simulate everything and construct anything.
And there are the "around the clock consultants"...going every thread to tell what is rigth and what is wrong..never watching for themselves to observe if there's something rigth or wrong with that behavior.
And there are the "analisers"....alike me...the ones that analises...analises.... and normally do not construct things that they analise.
A constructive, diy construction behavior, starts as a passion.... people go doing...without simulate, analise, redesign or something different....alike Surfin.....Let's go!!! is the order..and them we will see how to manage troubles...if not this way, not one would Surfer in Maui...or Waikiki...or in some places were the bottom is made of reefs...the let's go is that passion!
Passion, love behaviors cannot follow instructions or detailed rules.works by impulses...by impulsion...hehe....try to imagine:
1) shut the ligths
2) Now talk gentle
3) Them.......
This will fail!..for sure she will search for a passionated man.
Observe threads...there are a lot fo sweet bread flyes... flying over the candies...ahahahhahaa..... not a big problem in the reality...the real problem is that those flies never land to contribute in the real world....and the forum is DO IT YOURSELF...hands on work in my point of view...not "move your lips" or "type by yourself"..or analise by yourself....they are "off topic" in my point of view....and out of the reality...thinking that they are consultants.
Consultants meaning i am understantings, are those ones that are called to produce solution to big problems...high level personal, famous and well known as people that has long experience, normally old folks, able to produce advises, helping some person or company that is in troubles...they are expensive too...and normally do not work for free.
regards,
Carlos
If not possible..because of board room..i will put an star marking my ground because of you...hehe...kidding..will be possible, of course.
I was remembering , Mr. Roender.... the idea, in the beginning of the tread...also in the former thread that produced this one (Simple amplifier) was to remove everything that was not "sounding"...things, when removed, made not difference to sonics perceive using audition tests (young kids helping..they have no preferences and they do not lye....also do not try to discover what you want them to tell you)
And this way; emitter resistance gone....VBe multiplier gone...output coil gone (but this is dangerous, depending the speaker may be needed)...also the input rail condensers were not "sounding" enougth to be keept there...near the output colectors...i found that even a 100N were working fine there.
This made me suggest Greg to exclude, or to let as "optional" those rail condensers...people can use them running wires or not use them.
In the future, some modifications will be done to make friends happy, in special suggestion that came from constructors or "quasi" constructors.
That preference will be posted here, because we have the "suggesters audiophiles"..those suggest...suggest...suggest and do not construct nothing.
Also, there are the re-designers..they redesign everything they see..also do not construct nothing.
There are the "simulators"..those simulate everything and construct anything.
And there are the "around the clock consultants"...going every thread to tell what is rigth and what is wrong..never watching for themselves to observe if there's something rigth or wrong with that behavior.
And there are the "analisers"....alike me...the ones that analises...analises.... and normally do not construct things that they analise.
A constructive, diy construction behavior, starts as a passion.... people go doing...without simulate, analise, redesign or something different....alike Surfin.....Let's go!!! is the order..and them we will see how to manage troubles...if not this way, not one would Surfer in Maui...or Waikiki...or in some places were the bottom is made of reefs...the let's go is that passion!
Passion, love behaviors cannot follow instructions or detailed rules.works by impulses...by impulsion...hehe....try to imagine:
1) shut the ligths
2) Now talk gentle
3) Them.......
This will fail!..for sure she will search for a passionated man.
Observe threads...there are a lot fo sweet bread flyes... flying over the candies...ahahahhahaa..... not a big problem in the reality...the real problem is that those flies never land to contribute in the real world....and the forum is DO IT YOURSELF...hands on work in my point of view...not "move your lips" or "type by yourself"..or analise by yourself....they are "off topic" in my point of view....and out of the reality...thinking that they are consultants.
Consultants meaning i am understantings, are those ones that are called to produce solution to big problems...high level personal, famous and well known as people that has long experience, normally old folks, able to produce advises, helping some person or company that is in troubles...they are expensive too...and normally do not work for free.
regards,
Carlos
Re: No problems Graham..i will try to do your suggested star grounding.
Carlos,
Ther's nothing wrong with this approach, removing any component that not impruve sound, but some of them is there for HF stability.
Have a nice day,
Mihai
ps. I'm not a guy who only simulate and construct nothing.
I simulate intensively and construct only if simulate very well 😀
http://www.diyaudio.com/forums/showthread.php?threadid=97144
destroyer X said:
Carlos,
Ther's nothing wrong with this approach, removing any component that not impruve sound, but some of them is there for HF stability.
Have a nice day,
Mihai
ps. I'm not a guy who only simulate and construct nothing.
I simulate intensively and construct only if simulate very well 😀
http://www.diyaudio.com/forums/showthread.php?threadid=97144
Oh!.. i am happy to know you have constructed nice Symassym amplifiers.
I hope a symassym constructor someday listen to this one.
I would be happy to read a review about differences.... well...i know the difference because i have both.
Dx amplifier was made by someone that already have listened Symassym...hummm...good publicity.... an effective advertising.
I have constructed Symassym too dear Roender.....but, sometimes, people loose memories....i have already lost them...you made a refresh on my memories.
regards,
Carlos
I hope a symassym constructor someday listen to this one.
I would be happy to read a review about differences.... well...i know the difference because i have both.
Dx amplifier was made by someone that already have listened Symassym...hummm...good publicity.... an effective advertising.
I have constructed Symassym too dear Roender.....but, sometimes, people loose memories....i have already lost them...you made a refresh on my memories.
regards,
Carlos
Dr. Carlos,
That amp is not symasym, is based on symasym design but is very different. Also, I build original symasym
That amp is not symasym, is based on symasym design but is very different. Also, I build original symasym
An externally hosted image should be here but it was not working when we last tested it.
Portable idea station...
Haveing a hard time this afternoon stabalising my little mosfet zen headphone amp, realy makes me scared of the DX, my trackrecord with solidstate is horrible.
All rigth Roender...your version of symassym...send me pictures please.
Or the link to your posts in Symassym thread....say...other different than the adress you have already informed...BTW..i am not a doctor...thank you by your positive intentions...but not a doctor..for sure.
Nordic....Dx amplifier was designed (copied, inspirated, imagined, created, adapted) for your happyness.
It works fine...and works fast...just do not use Klaas scope...ahahahahah!
I have simulated your schematic...the poor man's Zen amplifier.... was interesting to see that bias is 4.67 volts for it.
I do not know details about fet....just that they use to compress sound...not all them of course...depending the design.....Aussie amplifier did not have compressed.... and bias there was more than 14 volts...and current needed was bigger than 200 miliamps to minimize distortions...another aproach...other idea...other amplifiers... i can see some advantages on them...but i am too much ignorant to go deep into those things.
Dx amplifier...a lovely amplifier is waiting for lovely folks alike you are dear Nordic.
I was collecting picture about those noisy.... and wonderfull powerholic guys, that use those monster speakers inside their cars...the problem is education not to bother...if the beach has not constructions...not problem!...will bother sand and coconuts only....problem is when those guys invade our beaches..near populated places surrounded by buildings.
Nice and funny image Nordic....we have those things too..including a cap with a mirror installed... to watch girls after they passed from you in the opposite direction..hummmmmmm....gooood!
regards,
Carlos
Or the link to your posts in Symassym thread....say...other different than the adress you have already informed...BTW..i am not a doctor...thank you by your positive intentions...but not a doctor..for sure.
Nordic....Dx amplifier was designed (copied, inspirated, imagined, created, adapted) for your happyness.
It works fine...and works fast...just do not use Klaas scope...ahahahahah!
I have simulated your schematic...the poor man's Zen amplifier.... was interesting to see that bias is 4.67 volts for it.
I do not know details about fet....just that they use to compress sound...not all them of course...depending the design.....Aussie amplifier did not have compressed.... and bias there was more than 14 volts...and current needed was bigger than 200 miliamps to minimize distortions...another aproach...other idea...other amplifiers... i can see some advantages on them...but i am too much ignorant to go deep into those things.
Dx amplifier...a lovely amplifier is waiting for lovely folks alike you are dear Nordic.
I was collecting picture about those noisy.... and wonderfull powerholic guys, that use those monster speakers inside their cars...the problem is education not to bother...if the beach has not constructions...not problem!...will bother sand and coconuts only....problem is when those guys invade our beaches..near populated places surrounded by buildings.
Nice and funny image Nordic....we have those things too..including a cap with a mirror installed... to watch girls after they passed from you in the opposite direction..hummmmmmm....gooood!
regards,
Carlos
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Hi Carlos,
I wonder if you tried listening with and without the 82 ohm rail resistors R15 and R18 on the last drawing above ?
If they do not make any difference that could be 2 resistors and 4 capacitors away !
I wonder if you tried listening with and without the 82 ohm rail resistors R15 and R18 on the last drawing above ?
If they do not make any difference that could be 2 resistors and 4 capacitors away !
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