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OK, this may seem a bit silly, but here goes.
Pretty standard repair of shorted power tubes on this DSL40CR. Replace mains fuse & power tubes. Testing to set the idle wattage, there is no current draw from the cathodes. The tube has plate & screen voltage, but it is low (abt 250V). It still seems as tho there should be some sound from these tubes. If you blast the signal into the return loop (or the main input) you will get sound, but obviously something is wrong.
Turns out if you don't have the schemo and have the amp sitting vertically with the power xformer on the bottom, the view of the B+ fuse FS-1 630ma is obscured, HOWEVER I did not expect that there would be ANY voltage on the plates/screens if there were a B+ fuse blown.
Anyway, just thought I'd throw this in, perhaps I should have thrown it out
. glen
Pretty standard repair of shorted power tubes on this DSL40CR. Replace mains fuse & power tubes. Testing to set the idle wattage, there is no current draw from the cathodes. The tube has plate & screen voltage, but it is low (abt 250V). It still seems as tho there should be some sound from these tubes. If you blast the signal into the return loop (or the main input) you will get sound, but obviously something is wrong.
Turns out if you don't have the schemo and have the amp sitting vertically with the power xformer on the bottom, the view of the B+ fuse FS-1 630ma is obscured, HOWEVER I did not expect that there would be ANY voltage on the plates/screens if there were a B+ fuse blown.
Anyway, just thought I'd throw this in, perhaps I should have thrown it out
. glen
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