MOSFET Amplifier IRFP240/IRFP9240 - Page 14

krachkiste · 10th March 2010, 07:46 PM

Allright.

Interesting thing, these 18k+19k - haven't thought of that.

After all, one single sinewave doesn't seem to be a sufficient approximation to music, when it comes to such details.

I will have to think about that.

I might have a look at some band limited pink noise signals and what slew rate they might ask for... (hmm, I guess actual music might do the job as well

)

but this is leading a bit off topic, maybe...

apexaudio · 11th March 2010, 06:40 PM

Quote:

Originally Posted by khalsa

hi apex thanks for send the power suplly pcb layout but i want the layout of your 20 no fourm kindly send me

This PCB is still in comercial use, posted Power and Protect PCB with Soft-Start is compatibile with MOSFET AMP. This PSU PCB is for stereo amplifier.

khalsa · 12th March 2010, 03:31 AM

hi apex i am used this circuit for comercial audio kindly send me the circuit and pcb layout thanks khalsaaudiocenter@yahoo.com

apexaudio · 12th March 2010, 09:30 AM

PCB still uses in comercial products is not for share.

apexaudio · 16th March 2010, 07:07 PM

BC327 and BC337 was replaced with BC640 and BC639. Pin layout on PCB is ECB and not compatible with CBE of BC327/BC337.

apexaudio · 16th March 2010, 07:20 PM

PCB with changes.

khalsa · 05:49 PM

hi apex what is the function off Q 22,23

apexaudio · 18th March 2010, 05:51 PM

Quote:

Originally Posted by khalsa

hi apex what is the function off q 22,23

VI cut-out. Post signal to protect bord #122.

Federmann · 19th March 2010, 05:21 PM

Quote:

Originally Posted by apexaudio

Simple Full Complementary Simetry +/-80V. Voltage amplifier/driver biased with 30mA. This driver circuit stabilized BIAS in output stage. Exelent stability without oscilation, hum and noise, sound great.
RMS Power: 240W 8ohm, 350W 4ohm

Nice work. I have something similar. Topology Federmann, HQQF-55 ...
I will soon publish a detailed plan and the results of all measurements and tests. I have very many interesting results.

apexaudio · 19th March 2010, 08:43 PM

Quote:

Originally Posted by Federmann

Nice work. I have something similar. Topology Federmann, HQQF-55 ...
I will soon publish a detailed plan and the results of all measurements and tests. I have very many interesting results.

Thank you, but I see much diferent design.

18th March 2010, 05:42 PM	#137
khalsa diyAudio Member Join Date: Dec 2007	hi apex what is the function off Q 22,23 Last edited by khalsa; 18th March 2010 at 05:49 PM.

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10th March 2010, 07:46 PM	#131
krachkiste diyAudio Member Join Date: May 2009	Allright. Interesting thing, these 18k+19k - haven't thought of that. After all, one single sinewave doesn't seem to be a sufficient approximation to music, when it comes to such details. I will have to think about that. I might have a look at some band limited pink noise signals and what slew rate they might ask for... (hmm, I guess actual music might do the job as well ) but this is leading a bit off topic, maybe...

12th March 2010, 03:31 AM	#133
khalsa diyAudio Member Join Date: Dec 2007	hi apex i am used this circuit for comercial audio kindly send me the circuit and pcb layout thanks khalsaaudiocenter@yahoo.com

12th March 2010, 09:30 AM	#134
apexaudio diyAudio Member Join Date: Feb 2010 Location: Serbia	PCB still uses in comercial products is not for share.