[Hallicrafters] 5894 Tube for the HA-6 Transverter

[jeremy-ca]

The 829B ( and the smaller 832A) and the 3E29 pulse version which were the 
daddy of the 5894/7854/Moto whatever, were almost always mounted horizontal, 
including WW2 aircraft. Sag is not a problem obviously.

The only problem in that family was the Amperex AX9903 which had very 
fragile glass to anode pin seals. Amperex very quickly came out with the 
5894 with the quite obvious thick glass and cured that issue.

I have a NIB AX9903 if anyone wants one for originality in something.

Carl
KM1H



----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
To: "David Thompson" <thompson at mindspring.com>; 
<Hallicrafters at mailman.qth.net>
Sent: Monday, August 27, 2007 1:13 PM
Subject: Re: [Hallicrafters] 5894 Tube for the HA-6 Transverter


> The 5894 is operated horizontally in more applications
> than vertically.  All of the Motorola Motrac units
> that use the 5894 and 8643 tubes have them
> horizontally mounted.  Same thing in many other
> commercial FM units.
>
> Glen, K9STH
>
>
> --- David  Thompson <thompson at mindspring.com> wrote:
>
>
> Only thing I disliked about the SSB-100A was the tube
> was mounted horizontally but guess the 5894 series is
> a hearty tube as most Eldico owners had good luck with
> them and no element sag.
>
>
>
>
>
>
>
>
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
>
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