1931-32 Cutting Edge Microphone Technology At The BBC. (inc The Voight Slack Diaphragm Condenser ! ?)

1932 Marconi-Reisz

In 1932 Marconi-Reisz carbon mics were still in regular use but their days were already numbered.

The other day I purchased a copy of the BBC Year Book 1933 from my usual supplier (ebay). The book covers the period from October 1931 to October 1932. Inside I found an absolutely fascinating chapter on the latest  developments  in microphones and associated technology heralding the move away from the old carbon mics and  the arrival of experimental condensers and the brand new Western Electric dynamic mic. It also describes an innovative new development in the form of equalisation circuitry for correcting anomalies in the frequency response of microphones. The birth of EQ as we know it today. Exciting times!

Here below I have scanned the whole chapter.

BBC Year Book 1933 Microphones p371BBC Year Book 1933 Microphones p372BBC Year Book 1933  Microphones  p375BBC Year Book 1933 Microphones p376BBC Year Book 1933 Microphones p379BBC Year Book 1933 Microphones p380BBC Year Book 1933 Microphones p381

Here is some more info about the slack diaphragm condenser

BBC Year Book 1933 Microphones p382

BBC Year Book 1933 Microphones p384

With the arrival of the iconic BBC-Marconi Type ‘A’  ribbon microphone in 1934 the somewhat unreliable condensers featured above were gradually phased out.

P.S.

The 1933 Year Book also celebrates the opening of the BBC’s fabulous new art deco London headquarters in 1932.

BBC 1933 Year Book inside front coverBBC 1933 Year Book inside back  cover

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2 responses to “1931-32 Cutting Edge Microphone Technology At The BBC. (inc The Voight Slack Diaphragm Condenser ! ?)

  1. Nice post! Now there is a microphone design that didn’t stand the test of time!

    Like

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