12-22-2018, 10:42 PM
This evening I revisited the 6T2.
I pulled the oscillator coil after unsoldering and removing what seemed like a million wires.
Hmmm...maybe I didn't have to remove the oscillator coil. Take a look at C14, 4500 pF;
[Image: http://philcoradio.com/images/phorum/6T2/6T2_060.jpg]
Notice how it is cracked?
I also pulled C9, 50 pF. Its case isn't cracked but it does look a little swollen.
Guess I'll have to see if I can find a 4500 pF mica cap...
Question for youse guys. Once again I refer you to the service manual for this radio, previously posted in this thread but HERE it is again (WARNING - LARGE FILE - 32.1 MB).
If I still need to remove turns on this coil, do I remove them from L7 or L6? I would assume L7 since the cracked 4500 pF cap was connected to one end of it but want to make sure that is correct.
OR
Since I have to replace C14 anyway, should I just make it a lower value and leave the coil alone?
While I was looking under the chassis, I noticed that I failed to replace R1, 220 ohms. Trimmer C3, the 1400 kc antenna trimmer, is turned out at the end of its travel also, just like the 15 mc oscillator trimmer on the tuning condenser. I'm starting to think that I really should just replace all of the mica caps under there since C14 is clearly bad and C9 is questionable.
It's funny that I didn't run into this issue on the RCA T7-5. It is the radio that had obviously been in a damp environment rather than this one.
I pulled the oscillator coil after unsoldering and removing what seemed like a million wires.
Hmmm...maybe I didn't have to remove the oscillator coil. Take a look at C14, 4500 pF;
[Image: http://philcoradio.com/images/phorum/6T2/6T2_060.jpg]
Notice how it is cracked?
I also pulled C9, 50 pF. Its case isn't cracked but it does look a little swollen.
Guess I'll have to see if I can find a 4500 pF mica cap...
Question for youse guys. Once again I refer you to the service manual for this radio, previously posted in this thread but HERE it is again (WARNING - LARGE FILE - 32.1 MB).
If I still need to remove turns on this coil, do I remove them from L7 or L6? I would assume L7 since the cracked 4500 pF cap was connected to one end of it but want to make sure that is correct.
OR
Since I have to replace C14 anyway, should I just make it a lower value and leave the coil alone?
While I was looking under the chassis, I noticed that I failed to replace R1, 220 ohms. Trimmer C3, the 1400 kc antenna trimmer, is turned out at the end of its travel also, just like the 15 mc oscillator trimmer on the tuning condenser. I'm starting to think that I really should just replace all of the mica caps under there since C14 is clearly bad and C9 is questionable.
It's funny that I didn't run into this issue on the RCA T7-5. It is the radio that had obviously been in a damp environment rather than this one.
--
Ron Ramirez
Ferdinand IN