[AMRadio] Low Power AM?


Bob Macklin macklinbob at msn.com
Sun Nov 23 17:43:51 EST 2008


When I say "maintain the dip" I mean I recheck the dip changing the load
capacitor.

Bob
K5MYJ
----- Original Message ----- 
From: "Peter Markavage" <manualman at juno.com>
To: <amradio at mailman.qth.net>
Sent: Sunday, November 23, 2008 2:34 PM
Subject: Re: [AMRadio] Low Power AM?


> I must be missing something in your words Bob (DGN). If, after operating
> at some plate current and RF output using a PI network, and now you want
> to reduce output, why would reducing the loading and re-dipping the plate
> capacitor (to return to resonance), become "non-resonant" unless the
> words that Bob (MYJ) used, "maintain the dip" means that he doesn't
> re-dip the final after a loading control change. Since the beginning of
> (my) time, the last thing I always do in a tune up procedure is to dip,
> or check the dip, of the final.
>
> Pete, wa2cwa
>
> On Sun, 23 Nov 2008 16:08:51 -0500 rbethman <rbethman at comcast.net>
> writes:
> > Bob,
> >
> > I'm NOT Pete.  He may feel insulted.  LOL
> >
> > You're using a PI network, NOT a link tuned system.  If you reduce
> > loading, AND maintain plate dip, You will indeed reduse output AND
> > go
> > NON-RESONANT.
> >
> > This opens a whole other can of worms.
> >
> > Bob - N0DGN
> >
> > Bob Macklin wrote:
> > > No Pete,
> > >
> > > I am saying to reduce the load capacitor and maintain the dip on
> > the plate
> > > capacitor.
> > >
> > > It's the same as reducing the coupling on a link coupled final.
> > >
> > > Bob
> > > K5MYJ
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