02-07-2018, 01:51 AM
Last September, I picked up an empty but otherwise in excellent condition, Philco 20B early version Cathedral cabinet. I have since completed it with a chassis and speaker. 
If all goes as planned, this coming Thursday, I have a fellow collector and Facebook friend dropping off a late version 20B Cathedral for me to restore for him.
I was contemplating working on them side by side.
I looked over the schematics briefly for both that Ron posted here at the Phorum, and downloaded them.
One question I have: The Capacitors in the Capacitor Block (27). Since they are marked with polarity, I assume electrolytics are called for. Are 450v caps sufficient?
Also, If I have problems find the exact value, are 2uF or 2.2uF substitutes OK?
My primary experience is in mid to late 1930s Philcos, so I'm wandering into somewhat unfamiliar territory with these 1930 models.
Any tips, advice and help are welcome and appreciated.
If all goes as planned, this coming Thursday, I have a fellow collector and Facebook friend dropping off a late version 20B Cathedral for me to restore for him.
I was contemplating working on them side by side.
I looked over the schematics briefly for both that Ron posted here at the Phorum, and downloaded them.
One question I have: The Capacitors in the Capacitor Block (27). Since they are marked with polarity, I assume electrolytics are called for. Are 450v caps sufficient?
Also, If I have problems find the exact value, are 2uF or 2.2uF substitutes OK?
My primary experience is in mid to late 1930s Philcos, so I'm wandering into somewhat unfamiliar territory with these 1930 models.
Any tips, advice and help are welcome and appreciated.
Blessings,
Jeff W.
Jonesboro, Arkansas
http://jeffsradios.weebly.com
God loves you as you are, not as you should be, because none of us are as we should be. - Brennan Manning
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