[Yaesu] Cetron 572b's

[George Gleim]

Greetings,

I know that Cetron supplied 572b's for Yaesu for use in the FL-2000b and
FL-2100b amps and also the Heathkit SB-200 and 201 series amplifiers.  I
also understand that the new Svetlana 572b's require a small
modification to the bias circuit when used in the FL-2000b and FL-2100b
amps (no modification needed in the FL-2100z and Heathkit amps.)

I've been told that the Russian tubes are very nice and the Chinese
tubes are ...well, not as nice.

The question is:  Does anyone know what happened to the Cetron
Electronics Corporation in Geneva, Illinois?

Also, I have a set of 572b's, new in the box, purchased as spares but
not needed.  Can anyone tell me what they might be worth?

Thanks, and very best regards.

George


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