My MOSFET amplifier designed for music

[FriedMule]

Great and thanks

 

[andrewlebon]

Hello Mooly
greetings is this correct layout for me to make pcb
warm regards
Andrew

 

[prasi]

Andrew,
Mooly has linked the layout in post 1 as the working layout and also here is the post by Marc on his build.
My MOSFET amplifier designed for music.

 

[Mooly]

It's not easy working out other peoples designs from pictures tbh but I'm puzzled where your R9 has come from.

I can't follow this bit:

 

[Bangla H]

Mooly that is additional/optional added FB Resistor.
Don't remind correctly who has done it.

 

[Bangla H]

to Friedmule

For your search.
The 150p also called "styroflex" or choose FKP2 like this:
FKP2D001501D00HSSD WIMA - Kondensator: Polypropylen | 150pF; 5mm; +-2,5%; 4,5x6x7,2mm; 1kV/μs; FKP2-150P/100 | TME - Elektronik Bauteile
FKP2D001501D00HSSD WIMA - Kondensator: Polypropylen | 150pF; 5mm; +-2,5%; 4,5x6x7,2mm; 1kV/μs; FKP2-150P/100 | TME - Elektronik Bauteile
That's what i use.
The 22p is also called "silver mica" or take a KERKO 500V disc capacitor.
Standard :: Silver Mica :: Capacitors :: Passive Components :: Electronic Parts :: Banzai Music GmbH
Mouser or Digi Key should also have stocked them.
Glimmer- und PTFE-Kondensatoren | Kondensatoren | DigiKey


To Mooly and interested it was #719

where prasi shared the schematic and layout with paralleled R9-680k to 22p.

 

[FriedMule]

Thank you, I appreciate your help. I am at this moment, trying to make a circuit. But I am sure it is all wrong, still funny though

 

[Mooly]

Mooly that is additional/optional added FB Resistor.
Don't remind correctly who has done it.

Yes, I vaguely remember now. It could have been AKSA that mentioned it.

 

[AKSA]

Yep, that's me.......
It is controversial. Unconventional, increases THD.
Still love your amp, Karl........

HD

 

[Mooly]

Thanks Hugh

 

[Dave S]

Yes, I vaguely remember now. It could have been AKSA that mentioned it.

I tried it. It was a bit too warm/soft sounding for my tastes, but worth a try.

 

[Mooly]

Thanks Dave

 

[andrewlebon]

Thank you Mooly i trying to make your amp but i cant afford company pcb so i will make
pcb by hand and try
warm regards
Andrew

 

[Mooly]

Good luck Have a look back at some of the designs that have been posted by Prasi and AlexMM.

There was one error on this one (arrowed) but otherwise it looked an easy to copy design.

 

[andrewlebon]

Mosfet Amplifier designed for music

Hello Mooly
greetings rough pcb for testing its prasi design

warm regards
Andrew

 

[andrewlebon]

Mosfet Amplifier designed for music

PCB

 

[prasi]

Hello Mooly
greetings rough pcb for testing its prasi design

warm regards
Andrew

Andrew,
I havent looked at the layout in detail, but I suggest to keep the original feedback take off point as per my design. There is a specific reason for that to reduce THD.

Make an extra drill in the layout and use a wire to connect.

regards
Prasi

P.S., if you look at my design, its single sided only but with repeat traces on top. and feedback takeoff can be a wire. just 2c.

 

[FriedMule]

Prasi do you have any files on your design?

 

[prasi]

FriedMule,
make your homework before asking. post #1 gives the details. i have it posted here.
My MOSFET amplifier designed for music.

you can easily import gerbers into sprint layout and make adjustments as per your components.

 

[FriedMule]

Yes sorry for that, but I have to admit I did not remember that post. I did read most of the 1000 posts but did not remember that you had been so kind to share your files.


Edit: it looks like it's the gerber files, or am I missing something?
I was looking for the project files