Message-ID: <002301c0ad36$0df0d4a0$ded81ad4@w8k3f0>
From: "Dick Rollema" <d.w.rollema@freeler.nl>
To: rsgb_lf_group@blacksheep.org
References: <16005567.984503931546.JavaMail.imail@chilly.excite.com> <004601c0ac7d$58993920$32d41ad4@w8k3f0> <000501c0acad$b595ffc0$2d2f883e@robing>
Subject: LF: VR136 = EF50?
Date: Thu, 15 Mar 2001 10:51:15 +0100
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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" <d.w.rollema@freeler.nl>
> To: <rsgb_lf_group@blacksheep.org>
> 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
> >
> >
> >
> >
>
>
>