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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: A friend just shorted my Sherwood S-5000! posted by Raver on December 29, 2003 at 11:48:39:
Raul,Your friend probably blew up the selenium rectifier. DO NOT OPERATE THE AMP RIGHT NOW OR YOU'LL SMOKE THE OUTPUT TUBES OR WORSE. NOT EVEN JUST FOR A MINUTE TO "CHECK" SOMETHING!! The capacitors are probably fine, but there may be other damage. The output tubes may well be toast.
The low plate voltages are probably caused by the severe load on the power supply. With no negative bias voltage the output tubes are running wide open passing as much current as they can, and are loading the power supply way beyond normal; those tubes will (if they haven't already) destroy themselves if this continues.
Where are you located, maybe I can repair it for you. I am really busy but I hate to see more damage done to the amp.
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Follow Ups
- Re: A friend just shorted my Sherwood S-5000! - Jim McShane 12:15:28 12/29/03 (4)
- Re: A friend just shorted my Sherwood S-5000! - Raver 12:51:35 12/29/03 (3)
- Better say, the line-marks on diodes should point at transformer(nt) - Koo 23:33:24 12/29/03 (0)
- Read the schematics, it's centre tap in bias circuit, two diodes OK BUT - koo 23:28:55 12/29/03 (0)
- Double posting, see my comments on tube asylum. Don't think it's OK - koo 23:15:07 12/29/03 (0)
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