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From: k2ors@comcast.net (Warren K2ORS/WD2XGJ)
To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@blacksheep.org
Cc: "John RABSON" <john.rabson@wanadoo.fr>
Date: Mon, 20 Mar 2006 20:41:40 +0000
Message-Id: <032020062041.10662.441F1383000DAE35000029A622007340760B97010D0A020E06979D0E03@comcast.net>
Subject: Re: LF: Decca SG
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Reply-To: rsgb_lf_group@blacksheep.org
Status: O

Hi Jason,

   I think what Costas was getting at is that the 6L6 was the grand daddy of all beam power tetrodes including the 807, 6146 etc. Yes the 807 has higher voltage and frequency rating than the 6L6 but both valves share a common architecture.


--
73 Warren K2ORS/WD2XGJ
FN42hi
http://www.w4dex.com/wd2xgj.htm

 -------------- Original message ----------------------
From: "John RABSON" <john.rabson@wanadoo.fr>
> >Yes, the 807 is more-or-less an 6L6 with different
> >connections.
> >
> >Costas SV1XV
> 
> I'm not sure I agree with this.  My Wireless World valve data book from the late 
> 1950s describes the 6L6 as an (audio) output beam tetrode rated for 300V on the 
> anode, 200V  on the screen, and delivering about 6W output.
> 
> The same book quotes the 807 as accepting up to 600V on the anode, 250V on the 
> screen and being able to deliver up to 40W RF at up to 60MHz.
> 
> I recall reading in the RSGB Bulletin of old-timer who ran 110W to a single 807 
> using on-off keying and with 1kV on the anode.  He said the important thing was 
> to keep the screen dissipation low.  I am not sure a 6L6 would do as well.
> 
> 73,
> John G3PAI
> 
> 
> 
>