04-01-2015, 02:19 PM
Hello, everyone.
I recently purchased a Model 37-84 and did the usual recap and resistor replacement as well as replacing the 4 meg with a 2 meg in the I.F. can as noted on the Philco Repair Bench website. However, I have run into a problem that I hope someone can help me with. The radio turns on but I do not get any stations unless I touch the grid cap on the 6J7G detector-oscillator. A couple local stations come in loud and clear. Touching the grid cap on the 2nd detector 6J7G gives a loud hum. Also, the volume control doesn't do anything. In other words, the volume is constant and doesn't get louder or softer. I changed to a 50k ohms volume control (the schematic calls for a 20k) with the same result.
Here is a link to the schematic: http://www.nostalgiaair.org/PagesByModel...013225.pdf
I look forward to getting any advice you can share.
Dave
I recently purchased a Model 37-84 and did the usual recap and resistor replacement as well as replacing the 4 meg with a 2 meg in the I.F. can as noted on the Philco Repair Bench website. However, I have run into a problem that I hope someone can help me with. The radio turns on but I do not get any stations unless I touch the grid cap on the 6J7G detector-oscillator. A couple local stations come in loud and clear. Touching the grid cap on the 2nd detector 6J7G gives a loud hum. Also, the volume control doesn't do anything. In other words, the volume is constant and doesn't get louder or softer. I changed to a 50k ohms volume control (the schematic calls for a 20k) with the same result.
Here is a link to the schematic: http://www.nostalgiaair.org/PagesByModel...013225.pdf
I look forward to getting any advice you can share.
Dave