No HFO, Mopar 802 / Philco C-4608 - Printable Version
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco-Transitone Auto Radios (https://philcoradio.com/phorum/forumdisplay.php?fid=7)
+--- Thread: No HFO, Mopar 802 / Philco C-4608 (/showthread.php?tid=2903)
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco-Transitone Auto Radios (https://philcoradio.com/phorum/forumdisplay.php?fid=7)
+--- Thread: No HFO, Mopar 802 / Philco C-4608 (/showthread.php?tid=2903)
No HFO, Mopar 802 / Philco C-4608 - Ed9000 - 02-07-2011
No Heterodyne Frequency Oscillator signal from stage V2. Try swapping V1 with V3, or replace V1.
Re: No HFO, Mopar 802 / Philco C-4608 - Doug Houston - 02-08-2011
If I remember correckutly, V1 should be the RF stage, and a 7A7. The oscillator-mixer is the 7B8, which couldn't be swapped with a 7A7. It might be well to try another 7B8, and it may cure the problem. But I wonder if possibly a mica cap in the oscillator circuit might have gone bad. My own experience with those sets has been that there is rarely a problem with the oscillator.
I can go to my books and see what the circuit is. The set is the same from 1941 through 1948.