To All from PA0SE
Robin T. Greenwood wrote:
I think it was known as an EF54?
You are right!
In a list of equivalent valves I found VR136 = RL7
And then in another list RL7 = EF54.
Thanks Robin!
73, Dick, PA0SE
----- Original Message -----
From: "Dick Rollema" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 14, 2001 11:52 AM
Subject: Re: LF: Re. E88cc in parallel
> To All from PA0SE
>
> John, G4CNN wrote:
>
> That's my memory too - i.e. the red or aluminium cans were EF50s. Why
some
> were red I don't think I ever knew.
> _______________________________________________________
>
> Is it not so that the red EF50 was the original one, developed by
Philips
at
> Eindhoven for television treceivers? Just before Germany occupied The
> Netherlands on May 10th, 1940, info on the production of the EF50 was
passed
> to on Mullard.
>
> The aluminium military equivalent of the EF50 was the VR136, which was
used
> in for instance tuning units of the Gee set; one as RF amplifier, one as
> a mixer and a VR137 triode as oscillator.
>
> 73, Dick, PA0SE
>
>
>
>
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