25W Mosfet audio amplifier

[bane84]

Hi,

Please does anyone have the PCB for 25W Mosfet audio amplifier,
that can be found on: http://www.electronics-lab.com/projects/audio/001/index.html

Thanx!

 

[MP1]

Have you asked the author of the circuit?
http://www.redcircuits.com/

MP

 

[bane84]

I don't think author would give me the PCB design,
because he sell it in kit.

Anyway I startet schematics in Protel and very shortly I will have PCB.
I was hopping that someone on this forum have it allready.
Thanx anyway!

P.S. How can I get lower range of frequency on this amp?
It says it will play from 30-20,000Hz. Can I make it from 20-20,000Hz?

 

[audioguru2]

P.S. How can I get lower range of frequency on this amp?
It says it will play from 30-20,000Hz. Can I make it from 20-20,000Hz?

Coupling capacitors cut low frequencies:
1) The 470nF value of C1 causes the output to be -3dB (half power) at 7.2Hz. If it is replaced by a 1uF film cap, the output will be -3dB at 3.4Hz and about -1dB at about 17Hz.
2) The 100uF value of C7 is fine. It causes the output to be -3dB at 3.4Hz.

 

[bane84]

Thanx man!
When I have time, will give a try.

I also found PCB for this amp.
It was created in Eagle program.
By the first look it is ok.

25mos.brd.zip

 

[audioguru2]

Hi Bane,
I'm glad you found its pcb.