[Amps] 813's.. Parasitic suppressor's

[Fuqua, Bill L]

Oh, yes , I used a pair in my first amplifier I built in the 60's I was a teenager then.
73
Bill wa4lav

________________________________________
From: amps-bounces at contesting.com [amps-bounces at contesting.com] On Behalf Of James Colville [jimw7ry at gmail.com]
Sent: Monday, April 12, 2010 9:51 AM
To: Edward Swynar
Cc: amps at contesting.com
Subject: Re: [Amps] 813's.. Parasitic suppressor's

I'm not sure what your talking about/going off about....?

Lots of discussion here about using 813s for amplifiers. You are correct.
They are a economical way to go.  I'm not sure credit cards have anything to
do with it though.

Please keep it in prospective...

73
Jim W7RY



On Mon, Apr 12, 2010 at 4:17 AM, Edward Swynar <gswynar at durham.net> wrote:

> 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 at telus.net>
> To: <amps at 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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> >
>
>
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