Quote:
Originally Posted by Steve_P
Speaker as suggested, Output transformer.
Check the battery switches too.
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Quote:
Originally Posted by davidw
When this happened to mine it turned out to be the primary of the output transformer.
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The lid switch is the most likely as it switches off the filament voltage when the lid is down. If this turns out to be OK then possibly the output transformer primary has failed. You will have to check some voltages in order to confirm these faults.
SB