Re: [Amps] 4-250A and interesting socket information.

[Bill Fuqua <wlfuqu00@uky.edu>]

For one thing the transmitters that used these tubes were mostly used in 
fixed communications sites.
Or in Shelters that were placed at some location and did not move often.
250th tubes were shipped in containers that had springs suspending them 
with in a frame.
Some tubes were shipped in containers using a frame made of card board or 
wood and the tubes were
suspended by fabric straps.

While these more or less stationary transmitters may have used  vertically 
mounted 250th, 100th, 4-400A and such the mobile transmitters used 211, 
813, 811, 807/1625 or 4X150 tubes which can take the vibration and operate in
other positions other than vertical.

73
Bill wa4lav

At 11:32 AM 8/25/2004 -0400, jsb@digistar.com wrote:
> On Wed, 25 Aug 2004, Bill Fuqua wrote:
>
> >        The specifications for the 4-250A are the same as the 4-400A
> > except for the plate dissipation. The 4-400A has fins added to the
> > anode. I prefer the 4-250A tubes when I have an amplifier with a window.
> > In SSB or CW a pair glows much better at full output power.
>
> How were these tubes cared for in the days when they were in typical usage
> during wartime, etc.?  Seems like a tube that got that hot wouldn't last
> long under battle conditions.
>
>
> 73 Jason N1SU
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