06-09-2016, 09:56 AM
I have a question concerning my Philco 118 cathedral.
While doing an alignment recently the AM band was in agreement with the dial scale, but all the sudden a few days ago I noticed the dial was a little off at 1000KHz and when the dial is set to 1500KHz to align the trimmers on the tuning cap I now need the oscillator trimmer nut all the way out to get a peak at 1500KHz. Now 1500KHz and 600KHz align perfectly with lower sensitivity at 600KHz. 1200KHz also is correct, but the rest are off by up to 15KHz when they were right before.
Also I removed the oscillator coil yesterday and it looks ok. When I put it back I reinstalled it the same way I took it out including proper lead dress and now I can only get the oscillator to go to 1491KHz when set at 1500KHz with the oscillator trimmer all the way out.
Anyone run into this problem before?
I've tried pretty much everything I can think of to fix the problem and have even enlisted the help of the Antique Radio Forums with no real solution as of yet.
While doing an alignment recently the AM band was in agreement with the dial scale, but all the sudden a few days ago I noticed the dial was a little off at 1000KHz and when the dial is set to 1500KHz to align the trimmers on the tuning cap I now need the oscillator trimmer nut all the way out to get a peak at 1500KHz. Now 1500KHz and 600KHz align perfectly with lower sensitivity at 600KHz. 1200KHz also is correct, but the rest are off by up to 15KHz when they were right before.
Also I removed the oscillator coil yesterday and it looks ok. When I put it back I reinstalled it the same way I took it out including proper lead dress and now I can only get the oscillator to go to 1491KHz when set at 1500KHz with the oscillator trimmer all the way out.
Anyone run into this problem before?
I've tried pretty much everything I can think of to fix the problem and have even enlisted the help of the Antique Radio Forums with no real solution as of yet.
