Hi Tom dividing down wasn't always necessary I have sample from the UK GPO
Crystal Factory of NT-cut bars, quartz tuning fork, and Gapped Ring
crystals, the latter marked 400cps (pre Hertz :-)) ) I think these are
post WWII because they are mounted in IO base GT style tube envelopes.
Dividers were achieved with neons and locked multivibrators, where
necessary, I believe.
[]
Alan
G3NYK
================================
I have one "500 c/s" GEC crystal in an octal base which is thinner than a
"60 Kc/s" one, so a different mode. Never had it working, though.
73,
David GM8ARV
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