[Boatanchors] LOOKING FOR FEW PARTS & TUBES

[WA5CAB at cs.com]

I thought I had some 6U5GT's but turned out they were all 6U6GT (a 6V6GT 
lookalike).

But to correct a previous statement, GT doesn't mean octal base, although 
most if not all of the tubes that it applies to are.  It defines the shape of the 
glass bulb as being straight (parallel) sided to differentiate the earlier G 
bulb, which flares out from bottom to near the top.  Octal tubes with 
nomenclatures without any alpha suffix are metal octals.  Then came the glass G's, 
then the smaller GT's and finally alphabet soup.  Some metal octals have alpha 
suffixes, but none beginning with "G".  Some octal tubes first appeared as G's 
(like the 5U4G) and some as GT's (like the 6SL7GT and 6SN7GT).  In which case 
there is no metal version.  So if there is (and I'm sure, despite Jacks's 
wife's comments) that if he says he has one there is, an octal 6 volt magic eye 
tube, it has to have a G or GT suffix.  Be difficult to see the eye otherwise!  

Wonder what the extra element might be in a 6X6GT?

In a message dated 3/4/2006 10:56:35 PM Central Standard Time, 
gsteffens at pitel.net writes: 
> I checked my foreign manuals and find no 6U5, GT or other wise (doesn't 
> mean
> there isn't one however) but I note there is a 6X6 eye tube that appears to
> have an octal base listed (at least as far as tubes with conventional tube
> designation: voltage, letters, number of elements).  There might be others
> in the lettered designation.
> 
> Cheers,
> 
> Gerry
> 
> 
> Collecting &Restoring since 1959
> Gerald Steffens P.E.
> Oronoco, MN
> 
> 
> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net
> [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of k0ewu at juno.com
> Sent: Saturday, March 04, 2006 10:27 PM
> To: gsteffens at pitel.net
> Cc: boatanchors at mailman.qth.net; BOATANCHORS at LISTSERV.TEMPE.GOV;
> Johnson at mailman.qth.net
> Subject: Re: [Boatanchors] LOOKING FOR FEW PARTS &TUBES
> 
> HI ALL, there is a 6U5gt, has an octal base, an english tube I think. I
> do have one of those in my collection, check with Jim Cross in Orlando.
> This is the only 6v eye with an octal base that I know of, can be wrong,
> usually am wife sez.
> old jack
> 
> 

Robert & Susan Downs - Houston
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