[Arran]

Hi everyone, great news! The radio is alive and well. I tried 2 different good tubes and went with the one that worked best. However, either of the two good tubes did not like lowering the oscillator resistor down to 10kohms, so I left the 15k in there. I actually put a pot in the circuit to find its "sweet spot" with both tubes and it liked the 15 k ohms best. I don't care, it works great now, now to add the MP3/ I pod jack so I can listen to old radio shows. I put in the 1/8" audio jack on the ungrounded end of the volume control. It works, but there is some bleedthrough from the am dial. I built an audio isolation transformer from the Radio Shack plans ( I forget where I saw that) but need an adapter to go from the rca jack to the 1/8" audio. Thanks to all for your help here. PS- I just bought another Philco 19 cathedral yesterday!! That one is now on my long list!!

I would avoid adding an RCA jack to any radio that did not have one, especially a Philco, every time I see one that someone else added to a radio I remove them since they usually cause nothing but trouble. In order to make one work without AM radio bleeding through you will need to kill the signal coming from the front end with a switch, then you have to worry about routing the cable correctly, and using shielding, and trying to get impedances to match, and this is if it uses a normal volume control with the input going to the grid of the first audio tube. If you want to avoid impedance matching problems, or having to work around archaic volume control circuitry, get an SSTRAN transmitter kit, then you can broadcast your music to an AM radio in the house, no holes, no evil RCA jacks, and no butchered wiring.
Regards
Arran