[ARC5] ARC5 Transmitter Calibration xtals

[bcarling at cfl.rr.com]

Thanks Rick - 

It's actually a pretty amazing and brilliant scheme! I have not seen the mirrors. 

The WS19 certainly didn't have anything as good as that!

37 de AF4K, Bry

On 16 Aug 2014 at 15:34, Rick Nasti wrote:

> The ARC5 transmitters all used a built-in VFO to set the transmitting freq.
> The octile based xtals were used with the 1629 magic eye tube to check the VFO freq by beating it against the xtal oscillator using the eye tube as a null indicator.
> That's what the little mirror on the inside of the tube cover door was for.
> Each transmitter used a different cal freq, which I think was near the center of the bandwith of the VFO.
> 
> I always thought it was a clever and somewhat elegant solution to the problem of keeping everyone on the same freq.
> 
> All of the above is based on 40 year old memories, but I believe it should be reasonably accurate.  
> 
> 73,
> Rick
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