[MrFixr55]

Hi DaveC,

First off, welcome to the Philco Phorum, a Phamily Phriendly phorum, pfull of phine pholk and phun Philco Phacts. (See a pattern here?)

Please review the Phorum Rules when you get a chance, and most importantly, the "What not to post in the Philco Phorum" message in each Phorum topic. Take a tour of all of the various categories. Note that we are happy to help on Non-Philco radios; there is a category for that, as well as TVs, HiFi Audio, test equipment and a "Trading Post for items for sale, wanted to buy, etc.

Please write a little about yourself in the "Introduce Yourself" section and don't forget to stop into "Old Ron's Bar and Grill" for a virtual burger and brew, and to shoot the breeze about the various and sundry topics listed in Old Ron's Bar and Grill.

And now about your radio.

Did it work before you recapped it?

Attached below are 2 links, one to the schematic in our Philco Library. (You will find a link to the Library on the Phorum's Home page to the right under the Philco Phorum title bar.) The other is a schematic for the Model 77 from Nostalgia Air. Ordinarily, I direct people to our library for schematics, but resistance and socket voltqage values are not listed on the schematic from our Library.

https://philcoradio.com/library/download...l.%201.pdf

https://www.nostalgiaair.org/pdfs/Philco...orp-77.pdf

This is a rather simple TRF radio, with some sort of neutralizing The 2 major concerns of this radio are the voltage divider and the primaries of the interstage coils.

First check the "voltage divider", consisting of the speaker field coil, resistors #30 and #26 and the volume control, item #1. An open anywhere in this "chain" will affect either B+ or cathode bias. The volume control has 2 sections. One section shunts the antenna coil. The higher the resistance, the more sensitive the radio is. The other section varies the cathode bias on the 1st and 2nd RF amps. Any break in the circuit, be it the speaker field, either of the 2 multitapped wirewound resistors or in the cathode bias section of the volume control will drive the radio totally haywire.

This radio is rather similar to the Philco 20; the main difference being the output tubes.

The Detector is of the "Biased Detector" variety. Putting a long wire antenna on the gird cap should allow the detector to pick up strong local signals. Unfortunately, it will also pick up hash from any LED, CFL, Digital TV, Cell Phone, computer, iPad, Router, WiFi thermostat, etc. plus all the hash on the power lines. Try doing the test in a remote location of your house or even outside, using an extension cord.

Keep us posted, ask questions. We want you to be successful!