----- Original Message -----
From: "Ron Youvan" <ka4inm@tampabay.rr.com>
To: "amps" <amps@contesting.com>
Sent: Thursday, March 31, 2011 8:57 AM
Subject: Re: [Amps] 813 Amplifier Article
> Fuqua, Bill L wrote:
>
>> I have thought of replacing the 813's with 4E27A's. Has anyone used
>> 4E27A's in grounded grid.
>> They are pentodes with 125 watts plate dissipation and wire the filaments
>> in series since they are 5V.
>> They should have a nice plate glow to them and go in the same socket.
>
> http://www.tubecollector.org/4e27.htm
>
> says the 4E27 has a 75 Watts plate dissipation.
> ??? I believe the 4E27 is more rare than 813s.
> --
> Ron KA4INM - Endless Loop: n. see Loop, Endless.
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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