[Heathkit] HW 101

[Bwana Bob]

Ed:

It may just be that the heterodyne oscillator coil is out of alignment. 
Output drops off very rapidly on one side of the peak. Crystal aging can 
send it off down the slippery slope. Check for cold solder joints on the 
crystal pins and try adjusting the het. coil before replacing the crystal.

On belts, you can sometimes find the correct "O" rings at traditional 
hardware and auto parts stores. The size you want is #226 (1/8 x 2.0) or 
  #227 (1/8 x 2-1/8).


					73,

					Bob WB2VUF

Ed Brooks wrote:
> I'm working on bringing an HW101 back to life.  Looking for a source for 
> the
> Preselector drive belts.  (Considered stringing  them with dial string 
> kits.)
> Also would like a "Second opinion."  Radio doesn't receive on 20 meters. 
> First suspected the driver plate and grid tuning coils, but since all 
> other bands work, and turning the 20 meter coils affects 40 meters, 
> (which receives very well) decided that is not the problem.  Next 
> suspected Heterodyne oscillator switch, but switch
> works.  Next in line is 22.895 crystal.
> Using a loop of wire, I hear all the crystals oscillating very well on 
> my Icom 706 as a "tracer."  Except for the 20 meter crystal.  It is very 
> weak and is three kc low, at 22.892.  The grid voltage on the 
> oscillator, though, reaches a normal level, and is adjusting per the 
> manual, using the oscillator coil.  Indicates the oscillator IS working, 
> but probably a long ways from frequency.  These being third overtone 
> crystals, I suspect it is oscillating at a fundamental.
> Have decided the crystal is defective.  Looking for second opinion???
> 
> Ed, W5HTW
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