TS-164 Version of the BC-221
The TS-164 was a repackaging of the BC-221 to achieve some of the
in-flight benefits enjoyed by Navy operators with their permanently mounted LM series frequency meters. It eliminated
dragging the BC-221 out from its storage location, the risk of sagging internal batteries on long flights, and made for
a visually clean installation - the top of the TS-164 is at the same height as the BC-348. It sits on a shock mount that
looks very much like the one for the AN/ARC-5 (and related) command set modulators, but the spacing is slightly different.
It was primarily intended to be used with the BC-224/348 receivers, but wasn't restricted to
those particular sets. The TS-164 case had a unique current sensing relay that responded to the main power switch of the BC-221,
simultaneously applying B+ from the receiver dynamotor without requiring any rewiring of the BC-221 installed in the
CY-182/AR shell. In that sense, it was a clever exercise in minimalism.
Components in rear compartment needed to provide power when BC-221 power switch is turned on.
Unfortunately, these components were often stripped out to convert the set to 115vac.
Power was provided by soldering this cable into three of the pins in the BC-348 rear power plug.
Below is the preliminary "manual" enclosed with each TS-164.
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