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874=US Navy CRC 38274 RCA Radiotron Balloon tests like new 1930's

874=US Navy CRC 38274 RCA Radiotron Balloon tests like new 1930's

$ 17.99

874=US Navy CRC 38274 RCA Radiotron Balloon tests like new 1930's in white box

 

voltage regulator (150VDC @ 10-50ma)


developed in 1925

See more: vacuum tube
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