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Topic: Tubes Won't Light on Classic 50/50 |
Dennis Detweiler
From:
Solon, Iowa, US
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Posted 13 Jun 2003 8:50 pm |
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This amp has been working great until I turned it on tonight. The power light, standby lights and fan are functioning. All of the fuses seem to be intact. So why no power to the speakers?
Thanks
Dennis |
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John Bresler R.I.P.
From:
Thornton, Colorado
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Posted 14 Jun 2003 8:06 am
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Dennis:
I have no experience with this amp, but since you stated that the tubes don't light up, it could be a filament problem. If you have a schenatic of the amp and a volt-ohm meter, you could check the filaments of each tube to see if there is continuity. This is assuming the tubes are wired in series. A good tube manual will also provide you with the pins numbers fo the filaments.
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Jerry Erickson
From:
Atlanta,IL 61723
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Posted 14 Jun 2003 1:35 pm
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| Pins 4&5 are the heaters on an EL84. |
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Dennis Detweiler
From:
Solon, Iowa, US
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Posted 14 Jun 2003 6:08 pm
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Problem solved. There are 4 fuses on the circuit board. I overlooked the 10amp fuse. Not sure what part of the circuitry this fuse protects?
Thanks
Dennis |
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John Bresler R.I.P.
From:
Thornton, Colorado
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Posted 14 Jun 2003 6:31 pm
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Dennis:
You could always ask Mike Brown about the fuse. He's always been great at customer support.
JB
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