My version of Hi-Fi Amp with optimal balances ease of assembly, cost, quality.

[SergVK]

http://www.powergood.boom.ru

Schematic - http://www.powergood.boom.ru/ampsch.pdf
PCB - http://www.powergood.boom.ru/amppcb.pdf

Also on page http://www.powergood.boom.ru/sborka.htm
schematic&pcb in Eagle format, scan pcb images.

Sorry, but description only on russian.

 

[destroyer X]

Sergei from Voronezh, can i construct it without this chip you show?

If possible, as a first step in construction and evaluation, tell me the resistor that must be changed because of Chip supression.

regards,

Carlos

 

[mod_evil]

Carlos,

The TL081 is a very very smal chipamps, you can buy it in saledepartament!

The datasheet of this: http://victoria.fis.uc.pt/ppessoais/correia/Aulas/FolhasSpec/TL081.pdf

 

[darkfenriz]

Hi SergVK
Very nice design. Is the prototype ready and working?
I'm a bit affraid of the servo mechanism. It can lead to some minor oscillations at very low frequencies if input is DC-coupled because of 180 degrees phase shift. Who knows what's on the output of a preamp. Maybe a cap, maybe no cap.
Regards

 

[Greg Erskine]

Hi SergVK

I get a "load error 286" when I open your eagle files. Any suggestions?

Thanks

 

[SergVK]

Hi SergVK
Very nice design. Is the prototype ready and working?
I'm a bit affraid of the servo mechanism.

Many people already assemble this amp and no any problem found with servo.

 

[SergVK]

Hi SergVK
I get a "load error 286" when I open your eagle files. Any suggestions?
Thanks

I download and open all eagle files successful.

 

[pinkmouse]

I get a "load error 286" when I open your eagle files. Any suggestions?

That means that Eagle thinks the file was created by a pirate version.

If SergVK can open it he may have an earlier release.

 

[AKSA]

Is this too complicated?

There is complexity in the two stage diff arrangement for which there is no evident reason, at least to me. Why?

It has a high component count.

I do quite like the output stage.

Cheers,

Hugh

 

[Greg Erskine]

I download and open all eagle files successful.

Thanks for testing it, SergVK

I downloaded the zips again and got the same error.

That means that Eagle thinks the file was created by a pirate version.
If SergVK can open it he may have an earlier release.

Thanks, looks like I'll have to redo it for Eagle 4.15 light, but before I even think about it, is anyone else having problems or is it just me?

Thanks

 

[SergVK]

Is this too complicated?
There is complexity in the two stage diff arrangement for which there is no evident reason, at least to me. Why?
It has a high component count.

It price of low thd<0.03%, bw~100kHz and excellent music reproduction.

 

[AKSA]

OK Serge,

I can appreciate that........ I will again examine the circuit; if its music reproduction is excellent, then I generally forgive all. And I thank you sincerely for posting your ideas.

Cheers,

Hugh