08-19-2015, 06:22 PM
On those 7H7 voltages being too high first look at the 7F8 pin 3 the plate voltage.
The 7F8 should be drawing current to set the voltage drop for the 7H7s pin 3. Is it high too? If so then check the resistors feeding from the power supply.
And of course check the other voltages around the 7F8. If it's bias into cutoff then those voltages will be high.
If you get the voltages right I suspect that the radio volume will come up.
The 7F8 should be drawing current to set the voltage drop for the 7H7s pin 3. Is it high too? If so then check the resistors feeding from the power supply.
And of course check the other voltages around the 7F8. If it's bias into cutoff then those voltages will be high.
If you get the voltages right I suspect that the radio volume will come up.
!!!!!!!!!!!!!!!!!!!RESISTANCE IS FUTILE!!!!!!!!!!!!!!!!!!!!!!
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[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif] Chris
