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Old 29th February 2004, 12:01 AM   #1
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Default Miniature 8pin socket

I have some EF40 tubes I want to use for a project but I can't find any sockets. The tube has 8 pins evenly spaced in a circle the same size as a normal 9 pin tube. Pins are also the same size as a 9 pin. I have done internet searches and nothing clicked. I could hack something up with an old circuit board and some push pins but I would like a socket if I can find one. Any ideas?

Thomas
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Old 29th February 2004, 01:44 AM   #2
RE 604 is offline RE 604  Germany
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Hello Thomas ,
what you need for EF 40 is a Rimlock socket .
Look here :

http://www.die-wuestens.de/eindex.htm

Regards , Alex .
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Old 29th February 2004, 03:13 AM   #3
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Hi,

Apart from some mild interelectrode capacitance differences due to the different socket layout the EF40 is the father of the EF86.

So if you want to have a look at what can be done with the EF40, any schematic using the EF86, EF806S, EF804, EF804S, E80F and my all time fav the British Z729 should provide plenty of inspiration.
US equivalent of the EF86 is 6267 and 6CF8, I think however that most of these were made in Europe for the US market anyway.

There's another one with variable u but I keep forgetting its name...

Cheers,
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Old 29th February 2004, 03:40 AM   #4
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Yes, it is a Rimlock socket. Thanks for the input and the link.

Thomas
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Old 29th February 2004, 04:10 AM   #5
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The German link has some Rimlock sockets but the picture provided shows a rather beat up sample. Does any one know of a US source? Shipping would be easier.

Thomas
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