[Heathkit] 467-1 harmonic drive

[Bwana Bob]

Mike:

The Harmonic Drive was used only with the HW-100. It provided a 28:1
reduction ratio. The drive consists of 2 parts, a large knob and a small
black splined piece. The small piece was pressed onto the end of the VFO
capacitor shaft and the knob snapped on over it. I don't believe it was
used on any rig but the HW-100. There really is no way to use the knob
on a conventional 1/4 inch shaft and of course, you need both parts to
make the drive work. The two parts  should be packaged together. Also, a
light silicon grease (more like a heavy oil) was used to lubricate the
drive. 

When Heath came out with the HW-101, the Harmonic Drive was replaced by
2 conventional 6:1 planetary drives in series.

If you don't need the drives and they are complete, perhaps some of us
HW-100 owners could use them as spares.

			73,

			Bob WB2VUF

Michael Tortorella wrote:
> 
> Hello all,
> 
> I have in my spares box two pieces 467-1 harmonic drive.  These look like the large knobs from the SB200 or SB220 but I can't figure out how they attach to the shaft.  The inner part seems to turn freely so I can't quite figure how these work, nor do I remember what radio they're from.  Can someone kindly clear up an old ham's befuddlement?
> 
> aTdHvAaNnKcSe and 73
> Mike W2IY
> 
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