[Boatanchors] 1625 tube

[G4GJL]

Type 807 is on a UX5 base
 Type 1625 , which is identical apart from its heater voltage and current 
(same consumed power) and base type. The base type for 1625 is UX7 not 
OCTAL.

OCTAL has eight pins (!) and a central spigot.

UX7 has 7 pins, two of which are somewhat larger than the others. These are 
the heater pins on the 1625.

Pete
G4GJL
----- Original Message ----- 
From: <Troglodite at aol.com>
To: <gzook at yahoo.com>; <boatanchors at mailman.qth.net>
Sent: Thursday, October 07, 2004 5:12 PM
Subject: Re: [Boatanchors] 1625 tube


> In a message dated 10/7/04 10:44:13 AM Central Daylight Time,
> gzook at yahoo.com writes:
>
>> Although the 1625 was designed well before the U.S.
> entry into  World War II it was a bit of an "education"
> (actually more like being  reminded of) the fact that
> there is still some history to be learned about  many
> of the things that we take for granted. <
>
> That is true. The 1625 is also an octal base, verses the 5 pin based 807. 
> I
> was surprised to find octal based tubes in sets from 1937. Apparently, the
> octal  design appeared a few years before I originally thought it did.
>
> Doug Moore
>
>
>
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