[Boatanchors] 813 grid to filament short

[W2HX]

I think some people on the list are smarter than the manufacturers.

 
73 Eugene W2HX
 


-----Original Message-----
From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Paul Baldock
Sent: Thursday, October 01, 2015 7:33 PM
To: rbethman; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] 813 grid to filament short

At 01:37 PM 10/1/2015, you wrote:

>The entirety gets back to 813s and mounting them horizontally. Bad 
>move!  W3BYM uses 4 813s to modulate 4 813s.  Should one dig up the old 
>ER issue, you'll find that he mounted them vertically! The only 
>intelligent way to do so.

Well I'm an intelligent person, I think. At least intelligent enough to read the manufacturers data sheet that says " in a horizontal position, the base pins No2 and No6 should be positioned vertically one above the other"

Then of course there's those beautifully constructed 813 amps in the
1968 ARRL handbook
http://www.arrl.org/files/file/protected/Group/Members/Technology/tis/info/pdf/68hb195.pdf. 
Yes the tubes are on their side, and that seems like a quite an intelligent article also.

- Paul


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