From: "Geoffrey G. Rochat"
Subject: Re: Digital divide by ten, 1949 style
Date: Thu, 19 Sep 2002 22:23:41 -0400
Organization: Sprint Advanced Network Services
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NNTP-Posting-Date: Fri, 20 Sep 2002 02:08:18 +0000 (UTC)
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>> 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
>> of the Radio Amateur's Handbooks. The best tube base reference I can
>> find is:
>You need a copy of Tube Lore (by Luwell Sibley).
Ayup. How 'bout I borrow your copy the next time you show at the
RetroComputing Society of Rhode Island, or you come along on another
Rhode Island Computer Museum Squid Squad computer rescue mission?
>> And he doesn't list 10-pinners or 10+1 pinners. What tubes are these
>> William? Curious minds desire to know...
>The most common of the mutants is probably the 6C9 (and 17C9)
>duotetrode. I think I have a few in my hamfest stock. 6J9 is another,
>although not nearly as common.
Well I'll be! It turns out the 6C9 is on page 184 of the RCA Receiving
Tube Manual, RC-24, of 1965, right here at my desk. The 6C9 wasn't
there last time I looked, William. How'd you sneak in and stick it in