Saturday, December 27, 2025

Zenith BC 221-T Army Signal Corp Field Frequency Meter

December 27, 2025 - Tested unit with my frequency counter and was able to get 3.5 MHz as expected.  Here's the power supply the unit had that a previous owner had built.



December 24, 2025 - Unit arrived and it has a 120v power supply - here's the schematic drawing from the inside.



 December 20, 2025 - Picked this up - waiting for it to arrive.



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