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 (or whatever the max. of my keyer is) for
maximum output, which is usually around 800 watts A0 into a dummy load.
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.
----- 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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