[R-390] R-390A Calibrator

[David Wise]

> Giles Gant wrote:
> >=20
> > I attempted to calibrate the 100kc calibrator on my 390A but it just
> > won't get there. I set up as given in the TM using WWV and 5.2 kc
> > above is as close as the C310 trimmer will bring the oscillator.
> >=20

Time for a new crystal.

With the crystal's sharp resonance, the tube
can't pull the frequency very far.  If it's
bad, it will prevent oscillation, but that's
about it.

73,
Dave Wise