Leon,
Try listening for the oscillators on a general coverage receiver. That should
help you find the one with the warble.
But before you do that, clean and reseat the Molex connectors. That is always
the first thing to do when something goes wrong.
73,
Bob AD3K
On Feb 11, 2014, at 8:59 PM, L
The analog switch is a CMOS 4016 on the parent board. It's the only IC there,
hard to miss. They have been known to cause similar issues.
Replace C2108 on the Power Supply board. Even if it's not the problem. Just do
it. Don't forget to check your Fixed Passband alignment when you are done.
If
Tuning the "cal." signal and monitoring a transmitted carrier reveals a slight
frequency "warble" of sorts. PTO is clean and has the ground strap
modification, and this issue seems unrelated to the PTO, in that physical
movement or position of the PTO has no effect. This is some type of minor
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