[Milsurplus] RD: EF-50

[Bry Carling]

Hello Larry - I have two or three EF50s that I bought  on ePay a few years ago.
I also have the scoekts for them. I am thinking about building the 2-tube EF50
receiver described on G4JCP's web site. Have you seen it?

I think it would adapt easily to 80m and 160m. Perhaps even 40m too.

http://www.g4jcp.freeserve.co.uk/pw/mar03c.gif

I know there were some other PW and/or WW articles that used more than two EF50 tubes. 

Regards - Brian, AF4K


On 29 Jun 2011 at 11:12, telegrapher at q.com wrote:

> re my earlier observation of a small round sticker on the side of
> the EF-50 tubes i have.  I found another package out in the garage
> that had 3 more of them in it along with a pair of brand new sockets
> for same.  All three of the tubes in there had the small round
> sticker on them that was marked 2-47.  So maybe these had a 2-47
> origination date.  Anyway didn't know i had sockets for a pair of
> them.  Wonder what was their destiny in the ham world?
> 
> BTW, if you haven't read the article concerning them provided by
> Meir, do so as it is very interesting not only about eh EF-50 but
> the background story on the development of tubes for the WWII radar
> systems.  They also mentioned the Western Electric 316A of which i
> happened to have had one NIB, until about 10 days ago.
> 
> Larry
> W0OGH
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