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21st July 2006, 04:01 AM
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#2 | |
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diyAudio Member
Join Date: Aug 2005
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Re: Beard P100 Amplifier
Quote:
Cheers, Shawn. |
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21st July 2006, 09:31 AM
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#3 |
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diyAudio Member
Join Date: May 2006
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You will not find a schematic. Bill Beard had a policy of not releasing schematics to the public. The present service dept continues the same policy and will not release schematics, so that's it I'm afraid, unless anybody has reverse engineered anything.
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23rd July 2006, 06:52 PM
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#4 |
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diyAudio Member
Join Date: Sep 2005
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Something about this...
Email can help you
 Regard analog guy |
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23rd July 2006, 06:54 PM
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#5 |
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diyAudio Member
Join Date: Sep 2005
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If you don't like PP Amplifier, this amplifier will change your mind
Super Durable Tube Power Amplifier, but already fixed by me !!!
Regard analog guy |
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24th July 2006, 02:08 AM
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#7 |
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diyAudio Member
Join Date: Sep 2005
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I fixed only switch !!!
I don't have a schematic but I can send you many pics via email.
I fixed it 2 years ago, only switch on-off broken !!! circuit is very good health !!! Regard analog guy |
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15th November 2009, 02:00 AM
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#8 |
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diyAudio Member
Join Date: Sep 2005
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I just bought a non-working P-100 but it looks different than the one in this thread. I think mine must be an earlier version.
The amp has a bias issue on one channel. The amp has a board with pots to adjust the tube bias (see right side of picture below). I believe the board connects to the cathode and then there is a 10 ohm resistor to ground. When I first powered up the amp with full voltage both of the 10 ohm resistors on the bad channel burned out. I thought the problem could be a bad cap in the bias board. Today I replaced the caps and the burnt resistors. I powered the amp up and thought I solved the problem. I had the amp on for about 10 minutes and began adjusting the bias to the .5 volts dc documented on the bias board. When I connected my multimeter to the output side tube on the bad channel I noticed the voltage begin to rise. Before I knew what happened the 10 ohm resistor flashed and it was gone. Any suggestions what to try now? I have tested the tubes and they all test good. |
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15th June 2011, 08:03 AM
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#9 |
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diyAudio Member
Join Date: Sep 2005
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