[Milsurplus] NOS/NIB British VT-25, 7.5-36 valves. Any interest?

[Andy Young]

You'll probably find there are 7 pins on your 'elliptical' bases - the
prewar British B7 base, which was still in use in some airborne equipment
during the war, for example Standard Beam Approach (SBA)

Andy
M0FYA

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of George Babits
Sent: 24 November 2017 22:41
To: Kenneth G. Gordon <kgordon2006 at frontier.com>; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] NOS/NIB British VT-25, 7.5-36 valves. Any
interest?

Yup;  British and/or Canadian.  For those who don't already know it; tubes
are "valves."

Not like US VT series of tubes.  The British (and Canadians) had a whole 
series of VT - -  tubes.  That stands for "Valve, Transmitting."   There is 
another whole series of VR - -; standing for "Valve, Receiving."  I have
quite a few of them from the stuff I got a couple of years ago.  Some have
regular octal bases; but there are a lot with 8 pins in an "eliptical" 
pattern.  Requires a special socket.  Not sure eliptical ones are good for
anything but restoration of very early war British equipment.  Some of the
ones with octal bases can be cross referenced to standard numbers.

73,
George
W7HDL


----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: <milsurplus at mailman.qth.net>
Sent: Friday, November 24, 2017 2:09 PM
Subject: [Milsurplus] NOS/NIB British VT-25, 7.5-36 valves. Any interest?


>I am helping dispose of an SK estate here. One item of interest we found is

>an un-opened
> box of 6 of the subject "valves". How these ended up in Moscow, Idaho, I 
> have no clue.
>
> These VT-25s are not in any way related to the VT-25 or type 10 used here.
>
> I found a museum which has a PDF of the specification and a pretty 
> extensive web page or
> two of this thing.
>
> Here is the URL to that:
>
> http://www.r-type.org/exhib/aab0122.htm
>
> Apparently they were used in many R.A.F. aircraft transmitters of the WWII

> period.
>
> Is anyone here interested in buying any of these? If not, they will go up 
> on eBay directly,
> probably next weekend.
>
> Photos are on my website at:
>
> http://www.w7ekb.com/Personal/VT25/
>
> I expect they are worth around $200.00 each and more.
>
> Thanks,
>
> Ken W7EKB
>
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