[Heathkit] HW100 loss of signal

[Don Cunningham]

Dick,
That SURE sounds like a heterodyne oscillator coil peaked wrong on 20M!!! 
I'm often wrong, but years ago I built two of those for friends, and found 
that when peaking the coils, sometimes there was a "sweet spot" that wasn't 
the real peak and it was troublesome like that.  Any "shock" to the 
oscillator would let it run a while.  Hope this helps!!
73,
Don, WB5HAK