Re: [TCML] unknown tube...

["Brian Foley" <ka1bbg@xxxxxxxxxxx>]

Hi, wrong base for 811, but maybe 805 or 813 was very common.....cul brian
f.


      www.genapro.com
----- Original Message -----
From: <Davetracer@xxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, February 08, 2008 10:34 PM
Subject: Re: [TCML] unknown tube...


>
>
> In a message dated 2/8/2008 10:56:04 A.M. Mountain Standard Time,
> ashumate3@xxxxxxx writes:
>
> _http://img249.imageshack.us/my.php?image=img3701ix0.jpg_
> (http://img249.imageshack.us/my.php?image=img3701ix0.jpg)
>
> I believe that tube is an 811A triode.
>
> Those started off as a GE tube of the 1930's for high power applications,
> but interestingly, were also manufactured later in the USSR. (I have one
that
> says, "Built in the U.S.S.R." just to make that clear. In red ink, too.)
> They're  apparently being made in China now and quality is all over the
place.
>
> You could try 6.3 volts on the heater circuit and see if it lights up, or
at
> least test for ohms across heater.
>
> Heater is on 1 & 4, grid is on 3, top cap is what you think.
>
> Good luck,
>
> Dave Small
>
>
>
>
> **************Biggest Grammy Award surprises of all time on AOL Music.
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10:06 AM
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