[R-390] TR: Learning about vacuum tubes

[Jacques Fortin]

Hi all,
If you are lucky enough to locate one and if you can read at bedtime, try the RADIOTRON DESIGNER'S HANDBOOK.
73, Jacques, VE2JFE


-----Message d'origine-----
De : R-390 [mailto:r-390-bounces at mailman.qth.net] De la part de Perry Sandeen via R-390 Envoyé : 25 octobre 2016 19:41 À : r-390 at mailman.qth.net Objet : [R-390] Learning about vacuum tubes

List,

If one wants to learn about vacuum tubes, Ebay has a list of mostly RCA manuals and some are on CD.

IIRC mine are version RC-21 but any in that vintage will do. Besides learning how tubes and tube circuits work they have listings or the proper voltage levels under the specific tube number.
One quickly learns that at least many SP 600's were built to non- recommended values. I wouldn't be surprised if other name brand B/A radios suffer a similar fate.
Regards,
Perrier
 
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