01-08-2021, 10:19 PM
Today I changed the first filter cap from 450uf to 33uf this should lower the peak rectifier current. Then redrew the power supply so it made sense.
I also drew in the ground at the 6A7 cathode where it use to have the volume control attached to it.
I also decided that it had too much audio gain after changing the 76 tube from detector to audio amp. and added some resistors to the volume control. I know I could have added a resistor the the 76 cathode and may try this instead.
After looking closer at the power supply I moved the power switch to hot side of the cord with a 2 amp fuse and made sure the neutral side went to the chassis part of the bias circuit. (it's a polarized plug) Now I only have 10vac from the chassis to earth ground.
I also drew in the ground at the 6A7 cathode where it use to have the volume control attached to it.
I also decided that it had too much audio gain after changing the 76 tube from detector to audio amp. and added some resistors to the volume control. I know I could have added a resistor the the 76 cathode and may try this instead.
After looking closer at the power supply I moved the power switch to hot side of the cord with a 2 amp fuse and made sure the neutral side went to the chassis part of the bias circuit. (it's a polarized plug) Now I only have 10vac from the chassis to earth ground.
!!!!!!!!!!!!!!!!!!!RESISTANCE IS FUTILE!!!!!!!!!!!!!!!!!!!!!!
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[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif] Chris
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