Winged Messenger of Radio

Thermionic Emissions

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Tube-Era Radios and Radio-Related Equipment

Clough Brengle Model 411

The Clough Brengle model 411 was probably the last audio oscillator produced by the company. "Probably" because production data from this period in the firm's existence is very scarce. Introduced sometime around 1955, the 411 was a very modern oscillator for the period, employing high quality passive components, and miniature tubes


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