EF50 was Re: radar history

Christian Corti cc at informatik.uni-stuttgart.de
Mon Mar 5 02:54:07 CST 2018

On Sun, 4 Mar 2018, Nico de Jong wrote:
>> E = 6.3v filament
>> F = Pentode
>> 5x = B9G base
> .. also known as Noval base

No, absolutely not ;-)
The EF50 has a Loctal base with eight pins. 5xx is Magnoval. 8x is Noval.


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