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27th May 2007, 10:59 PM
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diyAudio Member
Join Date: Mar 2007
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fisher 800c intermitant hum
No sooner do I get one thing fixed, than another thing starts to go bad. Lately my fisher 800c has developed an intermitant hum in the right channel. I have replaced all caps, I mean all electrolytics. I was told that plate resistors that are going bad can cause this?
Where would I look to fix this issue? The driver phase inverter tubes or the 7591 outputs. Am I right concerning the plate resistors.? I swapped the output tubes around as well as the drivers and no change, so I don't think its the tubes. I checked the grounds and they appear ok. Steve |
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problem fixed
