RCA 4-A-1 Condenser Microphone – by John Staples W6BM

The RCA 4-A-1 condenser microphone was the mainstay of studio microphones starting in the 1930s in the NBC  network.

RCA 4-A-1 Microphone

This Post Has 2 Comments

  1. I am surprised to find out that RCA, a company well-known for their broadcast-oriented ribbon microphones, built and used condenser mics as early as the pre-war era. I wonder what circumstances dictated which of these microphone styles would have been used (neither were suitable for outdoor use, given their delicate construction), although RCA had dynamic mics as well. Excellent article!

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