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Old 18th March 2010, 09:56 PM   #11
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Last edited by apexaudio; 18th March 2010 at 10:06 PM.
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Old 20th March 2010, 01:31 AM   #12
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PCB size: 85x77,5mm
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Old 21st March 2010, 12:05 AM   #13
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Default Auto offset

Quote:
Originally Posted by stoc005 View Post
When you have a capacitor (C6) that shouldn't be there if the servo works at all?? The point of a servo is to eliminate the dreaded bipolar (usually) 'lytic cap in the feedback path, IMHO.
I give wrong name, let it be Auto offset. For home aplication R1,R2,C1,D1,D2 can be removed, and BD139 put on heatsink for AB setup. Bias can adjust with variable resistans of R22. PCB can be used for similar circuit... DIY is a hobby, have fun.
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Old 21st March 2010, 08:34 AM   #14
Tarzan is offline Tarzan  Belgium
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Hi ApexAudio,
I have to admit I totally agree with butch_vlad.
Here you say "this are not DIY project or KIT-s" and then you say "This amp is for beginer and for hobby" and "DIY is a hobby, have fun".
The number of "wrong" and amended schematics/pcb's s to big to have a DIY ever complete one of your proposed amps.
Better to start the header with "Experimental and not ready".
But I do appreciate the effort in bringing so much up.
A bit more care and we all enjoy your contributions.
Cheers,
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Old 21st March 2010, 09:47 AM   #15
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Nothing is " Experimental " all project which I share was my old project 100% functional. I made every of this amplifier for many years. Many shematics was lost at the time, but PCBs layout have no mistake. If you are interesting for any of my project be sure that I explane you, just ask me what you interesting. I not sell you a KIT, you must cooperate if you want DIY something.
Regards

Last edited by apexaudio; 21st March 2010 at 09:58 AM.
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Old 21st March 2010, 09:53 AM   #16
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Example of cooperation is Adrew Lebon in my thread 900W H-class amplifier with limiter. I help him to correct his own mistakes.

Last edited by apexaudio; 21st March 2010 at 10:00 AM.
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Old 21st March 2010, 10:55 AM   #17
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Amplifier is not complete without PSU and protect.
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Old 27th March 2010, 07:25 AM   #18
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Default Hh m900

Similar schematics with manual offset setup.
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Old 27th March 2010, 08:39 AM   #19
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Default Harisson X1000

This PCB based on Harisson X1000 schematics.
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Old 27th March 2010, 08:43 AM   #20
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Sorry Harrison not Harisson.
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