HW-101 VFO problem

[Steve & Anne Ray]

Only 20 KHz out is not to bad, mine varies about the same.   I use a SB-650
digital readout and don't worry about the dial.  While the SB-650 are hard
to find, there are plenty of good kit digital readouts available.  I use a
Oak Hills Research DD-1 with my HW-8 and have been very pleased with it.
As usual I have no connection, etc.with Oak Hill Research.

73,

Steve Ray    K4JPN   ex K1VKW   HW-101, HW-8,
SWL 30-40, Pixie II, NC 38S, OHR 100A 30 M and Heath Kit fan


----------
> From: Paul K. Dean <wb9hgz at CHARLOTTESVILLE.NET>
> To:
> Subject: HW-101 VFO problem
> Date: Monday, November 09, 1998 11:26 AM
>
> Hi, everyone -
>
> I am bringing a "basket case" HW-101 back to life.  After many, many
hours
> of work, I have it pretty close to going.  Wow, what a job it has been.
At
> any rate, I have an interesting problem with the VFO that I'd like to run
> by the group for comment.
>
> The problem is one of VFO tracking.  I can calibrate the "high end" using
> the coil slug as detailed in the manual.  The "low end" is about 120 khz
> off, but can be brought in using the trimmer.  At that point, the "high
> end" is off.
>
> To make a long story short, going back and forth, I could get the unit to
> calibrate only within 80 khz.  (In other words, if the "high end" is set,
> the "low end" is off 80).  Took the vfo apart and tested all the
> capacitors.  All tested OK insofar as I could tell using my Heath "Magic
> eye" "condenser" checker.  Found several caps not positioned as per
> instructions, re-installed so everything was as per the photograph and
> diagrams. Calibration is better, but still, I run out of trimmer while
the
> lower end is still 20 khz off.
>
> Put on a frequency counter...... at the point of running out of trimmer,
> the vfo reads 5.000 at the high end of the band and 5.480 (should be
5.500)
> at the low end.  Can't bring it up any farther.  Trimmer screws are all
the
> way out.
>
> Any ideas or thoughts would be appreciated!
>
> Thanks and 73,
> Paul, wb9hgz
>

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