MosFet Class A amp, better compensation, TMC ?

[Joachim Gerhard]

Also for the 10th aniversary Frickelfest.

 

[dadod]

Also for the 10th aniversary Frickelfest.

I hope you are going to finish CFA 100W amp, you could be surprised how good it sounds.

By the way, I have CFA version with lateral mosfets, but not ready PCB.

 

[Joachim Gerhard]

OK, that sounds interesting.

 

[dadod]

Something like this.

 

[Joachim Gerhard]

This is a pretty cool compilation :
https://www.researchgate.net/publication/312557447_Audio_Amplifier_Systems_A_Compilation

 

[as_audio]

Typisches Beispiel für einen "link" wo man nix finden kann..
Danke.

 

[Joachim Gerhard]

Klar, runterladen.

 

[Joachim Gerhard]

Rechts oben....

 

[as_audio]

Bei mir nich. Is halt nur für schlaue

"Your download will start in a moment"

Ich zahl schon mal den Sarg.

 

[as_audio]

Jau, jetzt geht es.
The complete work of M. Hawksford et al in a large compilation of about 400 pages.
We may discuss this tomorrow.

 

[Joachim Gerhard]

This is only his analog amplifier work. He did a lot of digital stuff too and speakers.

 

[Joachim Gerhard]

I was very busy. Dear Michael, i really would like to build the circuit of Post 116.
Did you develop that circuit any further and can it be build without problems the way it is ?

 

[dadod]

Hi Joachim, how is going with 100W CFA amp, still to busy to finish it?
BR Damir

 

[Joachim Gerhard]

It is not busyness that keeps me from building it. There is is nothing from me in it. I simply do not feel the urge. Maybe you can enlignten me why i should build it.
Maybe it is because i do not understand it. We certainly do not need abother discussion about CFB and VFB. The sound ? Subjective at most. I know what i like but i am still able to learn and get better.

 

[dadod]

It is not busyness that keeps me from building it. There is is nothing from me in it. I simply do not feel the urge. Maybe you can enlignten me why i should build it.
Maybe it is because i do not understand it. We certainly do not need abother discussion about CFB and VFB. The sound ? Subjective at most. I know what i like but i am still able to learn and get better.

It's not my intension to urge you to build it.
This is not a TMC used here but (I think unique) double parallel TPC, one around VAS and one from the output (you can see it from schematic, C4 connected directly from the output, similar what Cherry suggested, but here is in TPC). This kind of compensation could be used, as here in a CFA, or VFA.
More importantly (for me) I would appreciate your opinion of this amp sound.

 

[dadod]

It's not my intension to urge you to build it.
This is not a TMC used here but (I think unique) double parallel TPC, one around VAS and one from the output (you can see it from schematic, C4 connected directly from the output, similar what Cherry suggested, but here is in TPC). This kind of compensation could be used, as here in a CFA, or VFA.
More importantly (for me) I would appreciate your opinion of this amp sound.

Corrected: C8 not C4

 

[Joachim Gerhard]

I understand. It is special so it is interesting to build it and listen to it.

 

[Joachim Gerhard]

I just read that you made the circuit for the latest Marsh amp. I only can asume that the circuits you post here do not even come close. So what is the reason to build one of your published designs ?

 

[phase]

I put together a couple dac kits, then messed around with some automotive type chip amps a bit, then found an older hafler to revive, has been pretty rewarding overall. Might be a path before embarking on a scratch built higher powered amplifier...
The light bulb tester is your companion.

And some car amps are pretty cool too.

 

[dadod]

I just read that you made the circuit for the latest Marsh amp. I only can asume that the circuits you post here do not even come close. So what is the reason to build one of your published designs ?

Marsh amp is 200W version with some modification, but very close to 100W version you have the boards. The same kind of compensation used.