[ARC5] ARC-5 as VFO

[AKLDGUY .]

That may be a bit unfair to Hallicrafters.
In 1983, I bought a deceased estate SR-150 transceiver of 1963 vintage
via a workmate and worked the world with it on 20m SSB with a dipole.

It had an incredibly stable VFO. At one point I had the set upended on
the table with the bottom cover removed to check something. While
listening to a SSB ragchew, I switched off, went up to the shops, did
some business, and was back about 40 minutes later. Switched on again,
and to my astonishment, the same ragchew was still going with no
retuning necessary!!!

73 de Neil ZL1ANM


On Friday, November 13, 2015, Kenneth G. Gordon <kgordon2006 at frontier.com>
wrote:

> On 12 Nov 2015 at 18:20, David Stinson wrote:
>
> > One wonders if the superior tuning capacitors in
> > Command Sets were somehow subbed for the
> > cheap, flimsy and drifty tuning caps in Hallicrafters
> > receivers, it might improve them considerably.
>
> And the cheaper Nationals too: like the NC-98 which has a really crappy
> tuning capacitor.
>
> BTW, it is my understanding that the VFO capacitor in the ARC-5
> transmitter is a
> considerably higher-quality model than either of the other two tuning caps
> in the
> transmitters.
>
> The VFO cap plates are supposed to be made of something like Invar so it
> is inherently
> temperature compensating.
>
> The other two use standard metals (brass? steel?), not Invar.
>
> At least this is what I learned some time ago. I'm sure someone here will
> correct me if I'm
> wrong.
>
> Ken W7EKB
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