[1000mp] AM Carrier setting

Thu, 29 Jan 2004 08:18:29 -0600

The FT1000MP ALC seems to drift in any mode requiring non-full scale
carrier power.  I run almost 100% CW at QRP power levels and even with
the 10W menu item selected the rig still drifts upwards in power over
the time span of 30 minutes to an hour.  It does eventually stabilize
and stop drifting.  During the "warm up" period I have to constantly
check and back-down the RF power control to stay at my target power
level.

The root cause is not the RF power pot, tweaky though it seems.  It's
somewhere else in the ALC system.

Just treat it like an old tube rig and let it warm up. ;-)  Seriously,
it doesn't need to be transmitting, just "on".

            72/73,
            *Lew*
             N5ZE

----- Original Message -----
From: "Bob Kemp" <[email protected]>
To: <[email protected]>
Sent: Thursday, January 29, 2004 7:09 AM
Subject: Re: [1000mp] AM Carrier setting

> Thanks Damon:
> That's what's happening to me.
> Bob
>
> Damon S Raphael MD (W7MD) wrote:
> > I have never gone inside to adjust the pot but the carrier power
out does
> > tend to increase and decrease unexpectedly.  It is a royal
pain.... as is
> > the tiny Power knob with mega-backlash.  I try not to run more
then 15 watts
> > to drive the Henry 3K-Ultra (3CX1200D7 - original design) for
about 250
> > watts out.
> >
> > Damon, W7MD
> >
> > ----- Original Message -----
> > From: "Bob Kemp" <[email protected]>
> > To: "Yaesu FT1000" <[email protected]>
> > Sent: Wednesday, January 28, 2004 5:16 PM
> > Subject: [1000mp] AM Carrier setting
> >
> >
> >
> >>I've got a minor problem with the carrier setting on AM (r3011 I
believe).
> >>I've set this 3 times now and the power varies after I set it at a
given
> >>level (15 watts).  I've set this little trim pot at 15 watts three
times
> >
> > now
> >
> >>and keying the rig right now, I get 10 watts or less out.!
> >>Anyone else have wandering power levels on AM like this?
> >>Bob
> >>
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