02-26-2021, 01:22 PM
I'll mention a couple of things. The difference between the vtvm and the dvm is negligible in comparison to what was use in '32. A 1000 ohms per volt would what the reading are based on.
Check the 250 ohm side of the volume control. It controls the amount current the 24A's in the rf amp circuit. If it's bad it can screw up the voltages. On some of these old Philco schematics the voltage readings are not measured from chassis ground but from odd places like across the tube in question or from the rectifier plate. Check the service notes to see that your measuring at the proper place.
GL
Check the 250 ohm side of the volume control. It controls the amount current the 24A's in the rf amp circuit. If it's bad it can screw up the voltages. On some of these old Philco schematics the voltage readings are not measured from chassis ground but from odd places like across the tube in question or from the rectifier plate. Check the service notes to see that your measuring at the proper place.
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
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