[ARC5] ARC-5 as VFO

[Leslie Smith]

Ken,
You wrote:  "> 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."

I presume the "OTHER TWO tuning caps in the transmitters" are the ATA
and BC-** series.
I think that's the obvious meaning.  Interesting!  I never knew that -
but if stability was a key requirement - then Invar would be an obvious
choice.

If that change was made it shows close liaison between the front-line
and A.R.C.
That's one part of the formula for a successful product - keeping in
touch with the people using the gear.

-- 
73 de Les Smith
  vk2bcu at operamail.com



On Fri, Nov 13, 2015, at 11:45, Kenneth G. Gordon 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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