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06-25-2009, 04:29 AM
| #1 |
| Supporting Member  Join Date: Sep 2007
Posts: 202
| Naim NAP 135 with Ultrasonic Oscillation
This amp has a 4Mhz oscillation on its output at all times. How do I fix that? Bootleg schematics: Amp Circuit Voltage Regulator Any help would be much appreciated. Last edited by rf7; 06-26-2009 at 01:07 AM. |
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06-25-2009, 06:04 AM
| #2 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
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Is R32 open? Over by the output. otherwise, does it pass signal?
__________________ Education is what you're left with after you have forgotten what you have learned. |
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06-26-2009, 01:12 AM
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06-26-2009, 01:50 AM
| #4 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
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Oh well, no easy points today. Does this amp have a preamp or is it a plain vanilla power amp like the schematic? Is the 4MHz present at R3? Is it riding the rails? That power supply is some serious overkill, but its complexity could make it unstable, are the rails clean? All those little caps hung all over it are there for stability, so check them.
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06-26-2009, 04:07 AM
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Thank you so much! Is there a charity that I can donate to for you? Enzo, you're the man! | |||||
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06-26-2009, 05:10 AM
| #6 |
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Buy me a burger next time I see you. Or, if you are in the mood, pop a donation to tboy to help support this terrific place he runs. Isn't there a donate button on the home page or something. We all should do that anyway from time to time.
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06-26-2009, 08:45 PM
| #7 | ||
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07-03-2009, 08:43 PM
| #8 |
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Took me a while to notice the donate button, but I did make a contribution. Thanks again Enzo.
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07-07-2009, 01:36 AM
| #9 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
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I see the donate button has turned green lately.
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