Any idea as to why the FM side of the radio on my '67 will not stay tuned to a station? There are times when it works fine but most of the time I'm constantly fine tuning it to keep it on a station. Sometimes I can't pick up any FM station. The AM side always works fine. Could it be the antenna or is there something else going on?
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Re: c2 radio problem
AM is amplitude modulation where broadcast carrier changes size in lock-step to base band information changes. FM is frequency modulation where carrier signal strength is constant but carrier frequency changes in lock-step to base band information changes.
FM reception requires the receiver's local oscillator to stay locked DEAD NUTS on the center frequency the radio is tuned to. If the local oscillator doesn't stay put (it drifts), you'll have the problem(s) you describe.
This is NOT an antenna issue, it's a problem inside the radio. That means pull 'er and take 'er to a competent radio repair tech to get 'er fixed.... -
Re: c2 radio problem
I have the same issue with my 65 and from what I am told, much of it has to do with the technology used in the radios back then. I had my radio restored this past spring and they had to replace a bad power supply and filter caps which were causing oslillation. While afterwards the reception on FM was better, I still have loose stations. From talking with the compayny that repaired it, the FM receivers would migrate to the strongest signal (versus newer technology which locks onto a signal). Thus if you are around tall buildings or going up and down hills, your signal may come and go.
You can have the insides of the radio replaced with more modern electronics to avoid this problem. While it tends to be annoying at times having the stations come and go, I keep mine original.Comment
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