[ARC5] crystal control

[David Stinson]

All interesting.  
But I don't recommend attempting to crystal-control 
a Command Set.   "Gilding the lily...."
I use them regularly for contacts on both 75 and 40 meters.
If properly refurbished, used as-designed and warmed-up 
for a few minutes, they are exceptionally stable.
If a transmitter wanders much, especially after key-down,
there's a problem.  I had an ATA 40-meter TX
that wandered about a KC after key-down.
That was a mildly gassy (or maybe grid-emitting) 1625.
Replacement fixed it.  Another on 80 meters had the 
problem of oxidation of the pressed-on connection 
strip on the PA padder cap stator.  Soldering iron 
fixed that one.

73 DE Dave AB5S