[Milsurplus] Unusual BC-221

[Glen Zook via Milsurplus]

In 1965, as a junior at Georgia Tech, just before I got married, I went to work at the Motorola Service Station, Atlanta Communications (the location was less than 2-blocks from the edge of campus).  The main frequency standard, in the shop, which was used to verify the transmitting frequency, and deviation, on low band (30 MHz to 50 MHz), high band (150.8 MHz to 174 MHz), and UHF (450 MHz to 470 MHz) consisted of an old Motorola station monitor which was originally crystal controlled, in which the crystals were replaced with a BC-221.
To determine the frequency to be measured, the formula for achieving this was posted on the rack which held the equipment.  One had to subtract a certain i.f. frequency and then "look up" the resulting frequency in the calibration book of the BC-221.  The calibration book was permanently attached to the rack.  Of course, to accomplish this, the BC-221 had to be calibrated at the nearest calibration point and then the needed frequency dialed in.
The crystal, in the BC-221, was verified, using WWV, on a regular basis to insure the accuracy of the unit.
Of course, there were contract customers and the settings for their frequencies were posted so the technicians did not have to calculate the settings.  Usually, when a new frequency had been calculated, the technician would then note the settings in a loose leaf binder so that, in the future, the settings would be available.
For measurements in the field, there was a Gertsch FM-6 and Gertsch FM-3.  One day, a new Motorola T-1021, which actually was a Measurements 760 with a Motorola name plate, frequency meter showed up.  None of the other technicians liked to use that meter, so, it became mine! Glen, K9STH

Website: http://k9sth.net