[cknob]

Doesn't the wire from terminal 3 go to ground through cap 35 or is my schematic reading inexperience on full display here?

[Steve Davis]

Here is the schematic I am looking at   Early Schematics – Philco Library (philcoradio.com)    (scroll down to 90 mid version) In this schematic there is a cap number 38 but, unless the cap is shorted, it won't change the reading.

[cknob]

OK that's the schematic I have.

[cknob]

OK I was doing something stupid.  The wire from terminal 3 is fine...it reads infinite resistance to ground.  The wire from BC resistor terminal 4 is the same readings as before...90.4k ohms with the speaker unplugged...3200 ohms with the speaker plugged in.

Pics show these 2 readings, the speaker socket and the general area around the speaker socket.  All tubes are out.  In the last pic, that small black box attachment is for a 1/4" jack input for Bluetooth and similar input.  Pretty sure it's not an issue.  Radio and it worked fine before.

[Steve Davis]

Chris, when you recapped the chassis, did you replace the caps in the tone control?

[cknob]

No I did not...I just sprayed contact cleaner on the 3 tabs and worked the controls

[Steve Davis]

OK, with the speaker plugged in, repeat the resistance check on wire 4. This time, turn the tone control to each position while checking.

[cknob]

Steve...it is 3200 ohms in all 3 positions on the tone control

[Steve Davis]

The tone control should have four positions. When the control is fully counter clock-wise you still get 32K?

[cknob]

Yes 3.2k...3200 ohms...not 32k

[Steve Davis]

Yes, I meant 3.2K.  Take resistance measurements on all speaker plug terminals first with the speaker plugged in and again with the speaker unplugged.

Steve

[cknob]

OK starting on speaker socket that is connected to BC terminal 4 and going clockwise.

Speaker plugged in:
1. 3200 ohms
2. Infinity
3. 98k ohms
4. 20 ohms

Speaker unplugged:
1. 90.6k ohms
2. Infinity
3. Infinity
4. 22 ohms

[Steve Davis]

The B+ line (speaker socket terminal 4) is shorted. You will need to trace that line all the way through.

Steve

[cknob]

Will do...thanks so much Steve...I'll get back to you. It's socket 4, the one that's reading 20 ohms plugged or unplugged correct?

[Steve Davis]

Yes, the one reads 20 ohms