[Boatanchors] EF50 Tube

[Michael Bittner]

Guess I should have put "TV-7 tube tester" rather than "EF50" as the subject 
of my initial email.  My TV-7 does have supporting data for testing the EF50 
(alias CV-1091) but no socket for same.  Does anyone know of a TV-7 adapter 
for 9-pin loctals?  I assume there must be one, based on the CV-1091 data in 
the TV-7 data book.  Mike, W6MAB
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----- Original Message ----- 
From: "Al Klase" <ark at ar88.net>
To: <boatanchors at mailman.qth.net>
Sent: Sunday, October 23, 2016 12:17 PM
Subject: Re: [Boatanchors] EF50 Tube


Mike,

The 9-pin loctal was strictly a European thing, introduce by Philips in
1938.  I've never seen it supported by any tube testers on this side of
the pond.  See: https://en.wikipedia.org/wiki/Tube_socket#Other_loctals

Might be easiest just to buy another tube fro 5 bucks:
https://vacuumtubesinc.com/index.php/catalogsearch/result/?q=ef50

Al

Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

On 10/23/2016 2:44 PM, Michael Bittner wrote:
> I'm trying to test an EF50 tube.  Radiomuseum says that the EF50 tube is 
> "identical" to a CV-1091.  My TV-7/DU tube tester data has settings for 
> testing the CV-1091.  However, both tubes a 9-pin loctals and the TV-7 
> does not have a socket for 9-pin loctals, only 8-pin loctals.  What's 
> going on here?  Help, is there some adapter that's meant for the TV-7 to 
> allow testing 9-pin loctals?     Mike, W6MAB
>
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