[Amps] 813 Amplifier Article

[Diane & Edward Swynar]

Hi Rob,

D'you want RARE...?

How about those Eimac water-cooled tubes that were used in mobile linear
amplifier designs by Bill Orr in the late 50's/early 60's...?!

I believe their type designations were prefixed by the letter "W"...

~73~ de Eddy VE3CUI - VE3XZ


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---- Original Message -----
From: "Rob Atkinson" <ranchorobbo at gmail.com>
To: <amps at contesting.com>
Sent: Thursday, March 31, 2011 10:47 AM
Subject: Re: [Amps] 813 Amplifier Article


> Glad to hear it.  I had thought 5-125 was almost unobtanium; even
> harder to find than 5-500s and 4-65As.
>
> The only ham rig I have ever heard of, that used the 5-125 was the
> Eldico TR-1TV which used one for the PA.  Few of them survive--as far
> as I know there are four or five hams running that rig.
>
>
> 73
>
> Rob
> K5UJ
>
>
> <<<I notice 4E27A's being ignored on Fleabay and at hamfests. My only
> experience with them was a couple of 6M AM rigs I built to get some
activity
> on the band. They sure did glow nice.
>
> The H&K 257B is a 4E27 clone.
>
> If you dont want bands above 20M a couple of 803's can really make some
> power and will take the same socket as the various Eimac 4- and 5- triodes
> and tetrodes.
>
> The 814/VT-154 is a scaled down 813 and generally ignored but 3-4 will be
> heard.
>
> Carl
> KM1H
>
> >>>
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