[ARC5] ARC-5 as VFO

[Kenneth G. Gordon]

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