[Boatanchors] EF50 Tube

[Jacques Fortin]

Excuse my ignorance, but does the TV-7 tester works similarly, with settings, to the Hickock / Stark tube testers of if it is a parametric one (given nominal transconductance value for a defined set of bias parameters, like the AVO testers) ?
I can provide setting values for both cases.

73, Jacques, VE2JFE 

-----Message d'origine-----
De : Boatanchors [mailto:boatanchors-bounces at mailman.qth.net] De la part de hwhall at compuserve.com
Envoyé : 23 octobre 2016 17:09
À : mmab at cox.net; boatanchors at mailman.qth.net; ark at ar88.net
Objet : Re: [Boatanchors] EF50 Tube

Maybe try checking the pinouts of the TV-7 tube sockets to see if all pins 1 are common, etc.  If so, and it is for my Hickock unit, then you probably can make up an adapter to plug into a 9-pin socket.

 

 Wayne
WB4OGM

 

-----Original Message-----
From: Michael Bittner <mmab at cox.net>
To: boatanchors <boatanchors at mailman.qth.net>; Al Klase <ark at ar88.net>
Sent: Sun, Oct 23, 2016 2:24 pm
Subject: Re: [Boatanchors] EF50 Tube

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
>