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

[Edward Swynar]

Hi Jim,

What I meant to say was simply this: in ye olden golden daze, times were
tough & money tight---so Hams had to use their smarts & innovate / modify /
save money...

But these days, credit is so easy nobody cares to build anymore. Why apply
gray matter when there's plenty o' green to be so easily mined in them thar
hills of credit cards...?!

~73~ de Eddy VE3CUI - VE3XZ

********************************

----- Original Message -----
From: "James Colville" <jimw7ry at gmail.com>
To: "Edward Swynar" <gswynar at durham.net>
Cc: <amps at contesting.com>
Sent: Monday, April 12, 2010 9:51 AM
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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