On 14-04-02 10:55 PM, Instrument Resources of America wrote:
Hello Charles, It is there. 0Z4, 0Z4G, along with 0Z4A.This appears to
be an oddity. As far as the JEDEC files in the TCA 'data cache' go the
0Z4G is listed in the INDEX under "Main type", and references the same
exact release number as the plain 0Z4 of #49. Upon opening up release
#49 there is only data on the 0Z4 and nothing for the 0Z4G.
I was using search in the "Mail release file and the 0Z4G did not come
up. I think I only have one of the little guys, and I recall when I
checked it on my Conar Emission Tester it did have a nice glow.
No I suspect that it was only made with the little T7 bulb, which is
about the size of the bulb in the metal version
That is Shown in My old Canadian General Electric Radiotron Manual also.
My guess is that the rest of the metal tubes almost always had a G
version before the T9 GT versions were invented, so the glass version of
the 0Z4 was also called G. The rest of the G version tubes were
originaly made in the ST-14 envelope, and changed to the GT name when
downsized to the T9 bulb. BUT you could not downsize the 0Z4G.
Anyone remember the GT/G designation?
--
Charles MacDonald Stittsville Ontario
[email protected] Just Beyond the Fringe
http://Charles.MacDonald.org/tubes
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