[ARC5] [MRCG] Attic Archaeology

[Jay Coward via ARC5]

,
 What exactly is the H-K test? I have two TA-12  transmitters with I think 4 ea 807's. If I can do this test with a TV-7 tube tester I could save you the trouble of the test and maybe cull a few out. I only need tubes for one. the other is a parter or a project for someone else.
 Jay
 
 
-----Original Message-----
From: Scott Robinson <spr at earthlink.net>
To: Jim Falls <radio-tuber at att.net>; MRCG <mrcg at mailman.qth.net>; ARC-5 <arc5 at mailman.qth.net>
Sent: Sun, Apr 19, 2015 9:03 pm
Subject: Re: [MRCG] [ARC5] Attic Archaeology


Folks,

I'd like to make a plea here. The Colossus computer in the UK  (which

runs and is demonstrated regularly), which was used to decode the German

high command code during WWII, uses a number of 807s (50, I think). For

reasons of preserving all details of the original design, they won't use

1625s. Don't ask, I already had that argument when I was there and they

weren't willing to budge on this point

I sent them about 30 such tubes last
year, and they were very grateful. 
If anyone has good (doesn't have to be new)
807s, I would like to get 
them, do the special H-K leakage test that Colossus
requires, and ship 
the ones that pass off to the UK. I will return all that
fail the H-K 
test to the original owner. In my experience so far, about half
of 
otherwise perfectly good 807s pass this
test.

See

<http://www.tnmoc.org/>

for info about the museum,
and

<http://www.tnmoc.org/explore/colossus-gallery>

for Colossus-specific
stuff.

It's a really good cause, and if any of you are in the London,
Bletchley 
Park, where Colossus and other such things are located, is a 45
minute 
commuter train ride out of (as I recall) London's Euston station. The

entrance to the park is about 1000 feet from the train
station.

Peace,

Scotty Robinson

On 4/18/15 1:50 PM, Jim Falls wrote:
>
I have 18 NIB 1625's and 3 loose that test excellent/near max scale on my Hickok
600. Anyone need some? I'll bring them to SLO.
>
> At least a dozen nib 211's
also.
>
> More later as I progress.
>
> Cheers!
> Jim K6FWT
> CBLA #37
>
______________________________________________________________
> ARC5 mailing
list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help:
http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This
list hosted by: http://www.qsl.net
> Please help support this email list:
http://www.qsl.net/donate.html
>
______________________________________________________________
MRCG
mailing list
Home: http://mailman.qth.net/mailman/listinfo/mrcg
Help:
http://mailman.qth.net/mmfaq.htm
Post: mailto:MRCG at mailman.qth.net

Website:
http://www.mrcgwest.org

This list hosted by: http://www.qsl.net
Please help
support this email list: http://www.qsl.net/donate.html