12-25-2016, 10:16 AM
Okay!
We have FM Stereo reception! I checked with my FM Stereo transmitter and a song which has obviously separate information in left and right channels. Yes, it is definitely receiving in FM Stereo. However...the dial pointer does not turn red. Neither dial pointer lamp is coming on.
I checked...the FM Stereo pointer lamp, PL9 I think, seems to be OK (around 7 ohms) but the other lamp, PL8, is open; which explains why the pointer is never illuminated.
Here's a partial schematic - click to enlarge:
[Image: http://www.philcoradio.com/images/phorum..._014sm.jpg]
I'm wondering if transistor TR307 has gone bad? It appears to control the PL9 pointer lamp. The only other components in this circuit are two resistors, R332 and R333. Or maybe the circuit will not work without a good PL8?
Let's all enjoy our Christmas dinners, and afterwards, I'll look forward to your thoughts. Merry Christmas.
We have FM Stereo reception! I checked with my FM Stereo transmitter and a song which has obviously separate information in left and right channels. Yes, it is definitely receiving in FM Stereo. However...the dial pointer does not turn red. Neither dial pointer lamp is coming on.
I checked...the FM Stereo pointer lamp, PL9 I think, seems to be OK (around 7 ohms) but the other lamp, PL8, is open; which explains why the pointer is never illuminated.
Here's a partial schematic - click to enlarge:
[Image: http://www.philcoradio.com/images/phorum..._014sm.jpg]
I'm wondering if transistor TR307 has gone bad? It appears to control the PL9 pointer lamp. The only other components in this circuit are two resistors, R332 and R333. Or maybe the circuit will not work without a good PL8?
Let's all enjoy our Christmas dinners, and afterwards, I'll look forward to your thoughts. Merry Christmas.
--
Ron Ramirez
Ferdinand IN
