05-18-2011, 08:18 PM
Well I ordered the power transformer the end last week and it came in today. It cost more than I paid for the set but it was a perfect replacement. Fit right in the original holes and the voltage and current was right on the money. After a hour of working on it on the bench she back working with a nice shiney new transformer. It runs a little warm so I'm going to do a little more checking to see how much current the HV side of things is hauling down. I think there something funny going on in the grid bias for the 47 tube. It's done though a resistor to ground on the center tap on 2.5 volt heater winding.
Terry
Started working on the Philco 21 again. Rebuild a speaker for it as the original one the field coil was open. Tnx to a member here who hooked me up with a speaker from what he thought was the 20. In reality it was from a 70 or 90 with a single 47. So swapped out the output transformer too. Onward to the chassis!
Terry
Started working on the Philco 21 again. Rebuild a speaker for it as the original one the field coil was open. Tnx to a member here who hooked me up with a speaker from what he thought was the 20. In reality it was from a 70 or 90 with a single 47. So swapped out the output transformer too. Onward to the chassis!
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
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
