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Old 25th June 2011, 09:09 PM   #421
yohnsee is offline yohnsee  Hungary
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Thanks a lot, lineup!
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Old 27th June 2011, 08:52 AM   #422
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Default DIY Amp Case

Suggestion for simple and low cost diy cases for amps.
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Old 27th June 2011, 07:38 PM   #423
amptech is offline amptech  Scotland
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could do with air flow holes....
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Old 4th July 2011, 11:44 AM   #424
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Thumbs up APEX CLASS B 500W

[QUOTE=apexaudio;2196885]Quasi complementary amplifier based on old Dynacord. For begginers Class B without adjust.[/QUO

hope this may help.this what i do when i have nothing to do at office.enjoy.

input capacitor used tantalum capacitor in series. same value as the original.

check for possible mistakes.i have not try this board.

im glad to help miles in his generosity.
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Old 7th July 2011, 03:28 AM   #425
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Mr. parts list to be displayed if?

Last edited by ariyanto; 7th July 2011 at 03:30 AM.
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Old 7th July 2011, 05:14 AM   #426
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Default Parts list,parts name and schematic of apex 500 watts

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Originally Posted by ariyanto View Post
Mr. parts list to be displayed if?
Enjoy!
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File Type: pdf 550w amp FOIL PATTERN.pdf (42.1 KB, 315 views)
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File Type: pdf 550w amp TOP VIEW.pdf (52.1 KB, 298 views)
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Old 7th July 2011, 06:20 AM   #427
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nice work...
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Old 7th July 2011, 07:04 AM   #428
radio is offline radio  Macedonia
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Hello all!
This is the image amplifier!!!
Cheers
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Old 7th July 2011, 07:53 AM   #429
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Enjoy!
Ok ..... thank you sir?
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Old 7th July 2011, 09:22 AM   #430
radio is offline radio  Macedonia
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Hi!
I want to create an audio amplifier in the 500W class-AB!
I ask for some help to replace some of the bias diodes D3 and D4 with variables bias circuits with transistor BD139 or similar!
thanks

Last edited by radio; 7th July 2011 at 09:27 AM.
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