"Its thermal. Could be an almost soldered connection, a connector, or
inside a chip or transistor.
You need a freeze mist and some warm air (hot air gun or hair dryer).
When it changes go cool a section. Then warm it, doing a binary chop
(cutting the area heated and cooled each time) to isolate it. You may
even get it down to the connection or device with the problem."
Yes, I figure to look in the area of the D5 varactor, thinking that the
voltage was being varied to it, causing it to shift.
Any other ideas are MUCH appreciated. I am not well experienced in
troubleshooting electronics but if you have a Steam operated pump or engine,
or a coal stoker I may be able to help. ;-) Mark
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