HW-101 VFO Frequency Shifts

[Robert P. Okas]

Hi Mike & gang,

    I've repaired at least two HW-101 VFOs with this problem. There's no
need to disassemble the VFO. The problem lies in the VFO shift trimmer.
This is a compression cap that is accessable on the top cover. Note the
position of the screw head and then turn the screw 1/2 turn in both
directions. A tough dog problem might require disassembly and puff or two
of air into the cap to dislodge any dust/dirt that may have accumulated.

Good Luck,
Bob - W3CD




On Fri, 21 Apr 2000, Mike Hardie wrote:

> My HW-101 has developed a rapid frequency shift of a few hundred cycles,
> then back, every once in a while.  It does not seem heat related and the
> VFO is definately changing frequency.  The reduction drive retaining bolts
> are secure and the reduction drives seem OK.  I'd like to remove the VFO
> subassembly for examination and cleaning the variable cap contacts but a
> bundle of wires makes access to two nuts/washers just about impossible.  Is
> there a trick to loosening these?
>
> Mike at: hardiem at intergate.bc.ca
>
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