Hi Jim,
So VERY many guys who are running 813s like that, now being "...outted"!!!
My, my...
These days, it seems, NOBODY wants to get caught admitting that they run
these venerable old jugs. Good for those who are willing to come out of the
closet like that!
I run a pair of them here, and they are probably the most cost-effective
"biggest bang for your buck" (FIGURATIVELY, not literally!) transmitting
tube around. Too bad others haven't recognized that fact...but I guess it's
so very easy to get credit cards these days that few bother to shop around
anymore with an eye to saving some green...
~73~ de Eddy VE3CUI - VE3XZ
**********************************
----- Original Message -----
From: "Jim Thomson" <Jim.thom@telus.net>
To: <amps@contesting.com>
Sent: Monday, April 12, 2010 6:35 AM
Subject: [Amps] 813's.. Parasitic suppressor's
> Somebody asked a while back abt the need for parasitic suppressors' on a
GG- 813 amp. A buddy
> had one blow up on his 2 x 813 amp last yr.. across town. he tossed
both the blown one.. and also
> the remaining one. Amp runs just fine with NO suppressors. Another
fellow runs a 4 x 813 amp,
> again with no suppressors. The tubes all balance out too..equal glow.
I'd try it with it with no suppressors
> 1st.... then if you do have stability problems.. then add them.
>
> If the screen and control grids are well grnded [via strap] to chassis...
you won't have stability problems.
> I have had 813's with as high as 3 kv on em, no load... yrs ago, with no
stability problems, but that amp
> did have suppressors in it [2 x 813's in GG] [80-10m]. That was back
in 1975. It's a pretty stable tube.
>
> Later... Jim VE7RF
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