[AMRadio] Low Power AM?


Bob Macklin macklinbob at msn.com
Sun Nov 23 15:57:58 EST 2008


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
----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Sunday, November 23, 2008 12:48 PM
Subject: Re: [AMRadio] Low Power AM?


> Bob,
>
> While the plate transformer may well handle that, you are tuning off
> resonance of the PI network.  That results in tuning off the Plate dip.
> I would NOT imagine that this concept would do the 6146s any good at all.
>
> I would suspect that a reduction of Drive would be wiser.
>
> Bob - NoDGN
>
> Bob Macklin wrote:
> > Can't you just run at reduced input by reducing the loading? Then run
the
> > tube(s) at the CCS rating. The power transformer should take that.
> >
> > Bob
> > K5MYJ
> > ----- Original Message ----- 
> > From: "rbethman" <rbethman at comcast.net>
> > To: "Discussion of AM Radio in the Amateur Service"
> > <amradio at mailman.qth.net>
> > Sent: Sunday, November 23, 2008 12:14 PM
> > Subject: Re: [AMRadio] Low Power AM?
> >
> >
> >
> >> George,
> >>
> >> Good question!  There is NO mention of RTTY operation ANYWHERE in the
> >> Apache Manual.
> >>
> >> I'm also not sure how you can safely reduce the power out put following
> >> the tuning procedures, WITHOUT doing some damage to some components.
> >>
> >> It does just fine on AM and CW.  Mixed results on SSB with the SB-10.
> >>
> >> Bob - N0DGN
> >>
>
> -- 
> Bob - NØDGN
>
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