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-   -   The EF50, the Tube that helped to Win the War (http://www.diyaudio.com/forums/everything-else/188834-ef50-tube-helped-win-war.html)

Edmond Stuart 11th May 2011 03:23 PM

The EF50, the Tube that helped to Win the War
 
For those interested in history, here's a most interesting and fascinating website: The EF50, the tube that helped to win the War
Some 50 years ago, I already heard about it vaguely. By that time I considered the story as family gossip. Now it appears to be true.

Cheers,
E.

edit: 40 -> 50 years

devilsindetails 23rd May 2011 05:31 AM

Very interesting Edmond. Thks for posting! Leo

Edmond Stuart 23rd May 2011 06:48 AM

To me it is even more interesting as the one who told me first about it (50 years ago) was .... my mother!

Cheers,
E.

picowallspeaker 23rd May 2011 07:55 AM

Now you can see that heater filament in transparency ,trough a banknote ...
:camoufl:


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