When is it a bad idea to use ceramic capacitors?

[DavGoodlin]

Originally Posted by Einar72

So what was the characteristic of the capacitor elements used in those ceramic-plate vertical integrators that were once so popular in Zenith TV's?

Good question. My '62 Motorola BW has one called a "vertical integrator", an integrated RC network intended to reduce assembly costs.

Are these are also called "gimmicks" in the audio stages of many tube radios?

[old_coot88]

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[old_coot88]

Originally Posted by DavGoodlin

Good question. My '62 Motorola BW has one called a "vertical integrator", an integrated RC network intended to reduce assembly costs.

Those were generally called 'couplates'.

Are these are also called "gimmicks" in the audio stages of many tube radios?

Um.. a 'gimmick' usually referred to a very small value capacitor (2 - 3 pf or so) consisting of pair of insulated wires twisted together for a few turns. Sometimes used for neutralizing an RF or IF stage prone to oscillation.