> 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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