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Old 6th May 2010, 03:24 PM   #41
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Default This drives me specially happy dear Sakis

We started in this forum, several years ago in the middle of a figth... i was in between the "cross fire"...we became "bros"....i am glad you want my amplifier.

Good news.... i was sad today, daugther had problems in school because remaining in the first place these last three years.....second, third and fourth place student's parents are complaining about the school evaluation of performance system... jellows and envy attacking my daugther there.... i have asked daugther to reduce her performance to avoid problems...not to be first place once again...she didn't.... she is good in Mathematics and leadership...school students loves her..this is what drives her first place.

But now i am feeling better knowing you are with me.

regards,

Carlos
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Last edited by destroyer X; 6th May 2010 at 03:40 PM.
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Old 6th May 2010, 06:38 PM   #42
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Two more questions before I try mine:
1) I found what seems to be a very good output coil in an old IBM PC PSU. Its diameter is 7 mm, and it is 20 turns long. I'm considering in using about 12 turns. How could we estimate the best length?
2) Wired resistors (not carbon or metal film) are not welcome for the 0.22R ones, right? But, as I live almost near the end of the world, having NO parts warehouse in a 150 km radius, my only option to turn on my prototype is using these guys. What would be the difference from using them or not? I know: it is also an inductor! But I thank for more information on this issue.
Photos are "coming out of the oven", as we would say here in Brazil! haha
Max.
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Old 6th May 2010, 06:41 PM   #43
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Welcome Mr. Sakis, from Greece! We have met in the Rod Elliot's P3A thread!
Due to the PCB bruhaha, I gave up and decided to enter Mr. Carlos' project thread.
I have already assembled 80% of 2 full boards, expecting to have them tested by the end of this week (I must attend to my job also!!!).
Best regards,
Max.
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Old 6th May 2010, 07:21 PM   #44
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Default Observe this group buy Nico opened some years ago, to HRII

Was in September 2007

You will see how many folks have ordered, and you will see names that still are in our forum, as Meanman for instance.

I was already in the correct track.... following the good clues....the HRII looks alike the Dx Blame ES...take a good look at the schematic and observe they are not too much different....it is the second in audio quality to the trebles...the second in audio quality to the bass is the Precision 1..the one is globaly the best is the Dx Blame ES...beating my amplifiers in everything.

Destroyer x Amplifier DX HDII version.

regards,

Carlos
Attached Files
File Type: pdf DXHRII-36-schematic-todd.pdf (152.0 KB, 391 views)
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Old 6th May 2010, 07:39 PM   #45
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Quote:
Originally Posted by smartx21 View Post
Welcome Mr. Sakis, from Greece! We have met in the Rod Elliot's P3A thread!
Due to the PCB bruhaha, I gave up and decided to enter Mr. Carlos' project thread.
I have already assembled 80% of 2 full boards, expecting to have them tested by the end of this week (I must attend to my job also!!!).
Best regards,
Max.
would you be kind enough to explain what is a PCB bruhaha ??? it sounds funny to me but it seems that my english is not enough for that
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Old 6th May 2010, 07:53 PM   #46
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Default Bruhaha

Quote:
Originally Posted by sakis View Post
would you be kind enough to explain what is a PCB bruhaha ??? it sounds funny to me but it seems that my english is not enough for that
(from online dictionary) Bruhaha: a fight or some kind of argument between more than just two people. This specific kind of fight is usually just verbal because when it's physical, it becomes a bruhehe.

Well, English is not easy for me too, but I try to do my best!
I think there was too much mystic about the design of a PCB there, and here I found a less difficult way to achieve my goal of constructing a homemade 100W amplifier. Comparing P3A and DX amp, I saw that a few parts more wouldn't be any trouble, in spite of acquiring a better result.
Maybe some day I will be able to test all the projects in the forum!!! But don't have all the time that would be necessary!
For this reason I decided to join this group, and elected DX Blame ST as MY FIRST HOMEMADE 100W AMPLIFIER! (first 100W...).
I hope to be able to help as well, not only ask questions...
Greetings from Brazil.
Max.
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Old 6th May 2010, 08:03 PM   #47
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that was very nice max...i enjoyed having a bruhaha with you ....

I wish you succes to your amplifier built ...i will look forward to see pictures and compaire to the one i built

happy joyfull regards sakis

i am more wise now that i know what was a bruhaha and a bruhehe ....it is still sounds very funny
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Old 6th May 2010, 08:55 PM   #48
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Default Smartx21..... your IBM supply coil will be good... 20 turns

and 7 milimeters diameter if air core... if has a core, then remove it.

knowing your wire diameter in AWG, them enter here.... from 2uH to 4uH is fine:

http://colomar.com/Shavano/inductor_info.html

regards,

Carlos
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Last edited by destroyer X; 6th May 2010 at 09:13 PM.
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Old 6th May 2010, 09:23 PM   #49
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Quote:
Originally Posted by destroyer X View Post
and 7 milimeters diameter if air core... if has a core, then remove it.

knowing your wire diameter in AWG, them enter here.... from 2uH to 4uH is fine:

Shavano Music Online - Cross-Over Network; Air Core Inductor Calculator

regards,

Carlos
Ok, thank you very much!

Max.
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Old 6th May 2010, 09:50 PM   #50
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Default Air core is important..if your coil has a ferrite inside..then remove it

ferrite, or iron core, depending how big is the current, saturates and generates noises in the audio reproduction..also increases the resultant inductance..so..the 22 turns, having 7 milimeters diameter, if have ferrite core inside, in the place to air core, will jump high in inductance value.

regards,

Carlos
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Last edited by destroyer X; 6th May 2010 at 09:54 PM.
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