From: "Michael A. Terrell"
Subject: Re: Digital divide by ten, 1949 style
Date: Wed, 18 Sep 2002 23:07:01 -0400
Organization: I'm trying!
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"Geoffrey G. Rochat" wrote:
> >And to be really bizarre, there are 10 pin miniatures in two formats -
> >one having ten pins in the semicircle instead of nine, and one having
> >a standard nine pin base but with an extra pin in the center (after
> >the tube makers finally abandoned the idea of having the tip on the
> >base). These ten pin tubes are not all that rare in the US, but get
> >skipped unless one really looks closely.
> I've seen 10-pins-in-a-circle on Nixies (as well as many other oddball
> Nixies bases), but never 10 pin small-signal "receiving" tubes, nor
> similar 10+1 pinners. They don't show in any of the several vintages of
> RCA, Sylvania or GE manuals I have, nor are they in RCA's HB-3, nor any
> of the Radio Amateur's Handbooks. The best tube base reference I can
> find is:
> And he doesn't list 10-pinners or 10+1 pinners. What tubes are these
> William? Curious minds desire to know...
The ten pin (Nine with a center pin) version was used in some FM
An old fart since August 5th, 2002!
Michael A. Terrell
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