Hi MMDers.  It was interesting reading about Richard Cardwell's
experience with frequency standards used to calibrate the frequency
meters built by his father's company (991216 MMD).  I just happen to
have one of those units, a TS-175/U, Army Signal Corps, complete with
the thick dial-setting-to-frequency book of conversion tables that
Robbie described.

We had one like it on the Navy ship I served on during the Korean War;
I think it was called an LM-103.  We used it for setting frequencies
on our low frequency transmitters.  Brings back a few old memories --
How times have changed !

Lee Roan