The PHILCO Phorum

For all models, single 47, push-pull 45s and 47s.

and the last two pages

Those who would want to know more:

Radio Troubleshooter's Handbook
by Alfred A. Ghirardi

https://archive.org/details/RadioTrouble...rsHandbook

I found a copy 50 ya. the most used and worn book in my radio library. Invaluable information on all those sets when they were "new".

Hard copies are still around, seen on Amazon.

Chas