Fender Champ 5F1: lowering the B+ 230/240V + biasing
This nicely built Fender Champ clone was dissipating 19W while the output 6V6GT is only rated for 14W. Although or exactly because it was built strictly to the Fender 1957 schematic, the voltages do not check out. The power transformer that was supposed to give 330V, is delivering +400V. European builds seem to suppose that wall voltage is 230V while after measuring, I found it to be 238+V. Connecting to the 240V winding brought the voltage down even more. Further biasing was done by changing the cathode resistance.
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