I have an old, but looks just like new, General Radio FR46/URM-18 Frequency
Calibrator.
It is a rack mount and has a metal container that has inner box that is an
oven. In the center of the oven is a suspended quartz block, hung by spring
like devices in all directions. The front panel has a
There could well be interest on the GenRad Yahoo Group.
-John
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I have an old, but looks just like new, General Radio FR46/URM-18
Frequency
Calibrator.
It is a rack mount and has a metal container that has inner box that is an
oven. In the center of the oven is a
