> > > ::50 dots per minute is about 2 wpm. Do you mean 50 wpm?
>
> @@ Yeaaah - good shot - wpm. Knob all the way to the right. One for you.
>
> > > ::If you're sending dits, it's actually A1, not A0.
>
> @@ 800 W out key down after it is tuned up. A0! One for me.
>
> > > ::The plate impedance is higher at lower plate currents, so of course
> this
> > > happens. Seems you're doing it right, but I wouldn't spend a lot of
> time
> > > tuning up an FL2100B unless you want a close-up demonstration of the
> "big
> > > bang" theory.
>
> @@ No worries mate. I never, but NEVER key down at full power out for
> more
> that 10 seconds, with 20 or more seconds in between. Could that explain
> why
> my FT-101E is still putting out 150 watts from its 1975 tubes?
::Could be! My (personal) problem with the FL2100B, as a previous
unhappy owner, is the set of obvious design deficiencies...including the
tiny little (12.7 cfm) cooling fans which move air only across the glass
envelopes, and cool nothing else; the horizontal tube mounting; the
ridiculous electronically regulated bias supply circuit that has a tendency
to create July 4th-like fireworks...these things have nothing at all to do
with how the amp is tuned or operated. But if it works for you...
73, Rick!
-Steve, WB2WIK/6
> Thanks for the reply and 73's.
> Rick WD8JJA.
>
>
>
> ----- Original Message -----
> From: "Steve Katz" <stevek@jmr.com>
> To: "'R_Davis'" <WD8JJA@arrl.net>; <amps@contesting.com>
> Sent: Friday, February 15, 2002 11:07 AM
> Subject: RE: [AMPS] AL811H on AM
>
>
> >
> >
> >
> > > This brings up a question I have always had.
> > >
> > > We are always urged to tune for maximum power out at maximum drive.
> For
> > > SSB, I tune my FL-2100B (you guys already know this has 572B's) with
> 100
> > > watts drive at ~50 dots per minute
> > >
> > > ::50 dots per minute is about 2 wpm. Do you mean 50 wpm?
> > >
> > > (or whatever the max. of my keyer is) for
> > > maximum output, which is usually around 800 watts A0 into a dummy
> load.
> > >
> > > ::If you're sending dits, it's actually A1, not A0.
> > >
> > >
> > > Now, for AM, RTTY, or some constant carrier mode, should the drive
> from
> > > the
> > > exciter be reduced without retouching up the tune/load controls?
> > >
> > > I typically repeak the output of both transmitter and amplifier when I
> > > reduce the power. This gives more power output with less plate
> current.
> > > The
> > > Plate control doesn't change much, but the Load reduces a lot when
> power
> > > is
> > > reduced.
> > >
> > > ::The plate impedance is higher at lower plate currents, so of course
> this
> > > happens. Seems you're doing it right, but I wouldn't spend a lot of
> time
> > > tuning up an FL2100B unless you want a close-up demonstration of the
> "big
> > > bang" theory.
> > >
> > > ::WB2WIK/6
> > >
> > > ----- Original Message -----
> > > From: "skipp isaham" <nospam4me@juno.com>
> > > To: <amps@contesting.com>
> > > Sent: Friday, February 15, 2002 12:37 AM
> > > Subject: Fw: [AMPS] AL811H on AM
> > >
> > >
> > > >
> > > > Hi Chris,
> > > > -
> > > > For reasons I'd rather not get into, your simple question
> > > > is a touchy one for many amps members.
> > > > -
> > > > Operation of an amplifier in AM mode should probably
> > > > be no more than 25% of it's SSB ratings.
> > > > -
> > > > hope hat helps... I'm not sure of the AL811H, but a quartet
> > > > of 811a tubes should at least do few hundred watts of
> > > > AM output.
> > > >
> > > > cheers
> > > > skipp
> > > > --------- Forwarded message ----------
> > > > From: Christopher Kaine <ckaine@one.net>
> > > > I am trying to get information concerning running an
> > > > AL811H amplifier on AM.
> > > > The manual does NOT include directions/recommendations.
> > > > TIA
> > > > Chris Kaine
> > > > N8JDG
> > > >
> > > > ________________________________________________________________
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> > > >
> > > > --
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> > > >
> > > >
> > >
> > > --
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> >
>
>
>
>
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