07-04-2018, 10:16 PM
Now, I needed to remove the oscillator section from the RF unit. This involved unsoldering no less than five wires, removing two bolts, and then removing it.
[Image: http://www.philcoradio.com/images/phorum...70_015.jpg]
Look - I had already replaced resistor (33)! You can see the new 10K resistor on the band switch.
[Image: http://www.philcoradio.com/images/phorum...70_016.jpg]
Resistor (32), 32K, still measured almost exactly 32K.
I decided to go ahead and replace (32) and (33) as well as mica capacitor (31), 250 pF. I replaced (33) with a 9.1K resistor this time, in case that was causing the oscillator to start late. I did not have any 250 pF caps so I replaced (31) with a 270 pF mica cap. And (32) was replaced with a new 33K (I had no 32Ks, that is no longer a standard value).
[Image: http://www.philcoradio.com/images/phorum...70_017.jpg]
Now it was time to start reassembling the RF unit.
[Image: http://www.philcoradio.com/images/phorum...70_018.jpg]
Once I had reassembled the RF unit, I put it back in the chassis and resoldered all 13 wires to the proper places.
While I had it apart, I went ahead and replaced the speaker cable.
more...
[Image: http://www.philcoradio.com/images/phorum...70_015.jpg]
Look - I had already replaced resistor (33)! You can see the new 10K resistor on the band switch.
[Image: http://www.philcoradio.com/images/phorum...70_016.jpg]
Resistor (32), 32K, still measured almost exactly 32K.
I decided to go ahead and replace (32) and (33) as well as mica capacitor (31), 250 pF. I replaced (33) with a 9.1K resistor this time, in case that was causing the oscillator to start late. I did not have any 250 pF caps so I replaced (31) with a 270 pF mica cap. And (32) was replaced with a new 33K (I had no 32Ks, that is no longer a standard value).
[Image: http://www.philcoradio.com/images/phorum...70_017.jpg]
Now it was time to start reassembling the RF unit.
[Image: http://www.philcoradio.com/images/phorum...70_018.jpg]
Once I had reassembled the RF unit, I put it back in the chassis and resoldered all 13 wires to the proper places.
While I had it apart, I went ahead and replaced the speaker cable.
more...
--
Ron Ramirez
Ferdinand IN