2019-03-31

from FB group Vintage transistor Radios April 3

Are all ‘polyvaricon’ tuning capacitors the same? They’re all about the same size.

Charles Vesser
Japan Industry Standard…

The few that I have examined were 140 pF antenna and about 70 pF oscillator. In parallel give 210 pF. They’re probably made to match up with the loopstick and oscillator coil, so the radios will track correctly over the whole AM band without labor intensive adjustment at the factory.

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