It is the input waveform of the amp that matters, not the output wave form.
73
Gary K4FMX
> -----Original Message-----
> From: k7rdx [mailto:k7rdx@charter.net]
> Sent: Thursday, March 23, 2006 2:10 AM
> To: garyschafer@comcast.net; 'noddie'; 'Ed Dial'; amps@contesting.com
> Subject: Re: [Amps] Tuned input board on SB-220
>
> The LDG module works FB with my YC-156 AMP...Output waveform looks much
> better than with untuned input,however it might taks a shoehorn to fit
> inside the Heath amps or at least some re-positioning of components.My
> connection to the YC-156 cathode is seven inches from the tuner board and
> it
> provides an acceptable input match anywhere I tune...And fast too.Jim
> K7RDX..
> ----- Original Message -----
> From: "Gary Schafer" <garyschafer@comcast.net>
> To: "'noddie'" <noddie@comcast.net>; "'Ed Dial'" <diale@mindspring.com>;
> <amps@contesting.com>
> Sent: Wednesday, March 22, 2006 8:22 PM
> Subject: Re: [Amps] Tuned input board on SB-220
>
>
> > There was some discussion on this board awhile back and wasn't it
> decided
> > that the tuner is actually an L network and not a PI? That would make it
> > unsuitable as a tuned input network.
> >
> > 73
> > Gary K4FMX
> >
> >
> > > -----Original Message-----
> > > From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On
> > > Behalf Of noddie
> > > Sent: Wednesday, March 22, 2006 10:10 PM
> > > To: 'Ed Dial'; amps@contesting.com
> > > Subject: Re: [Amps] Tuned input board on SB-220
> > >
> > >
> > > The AT-100AMP is what I am going to use on my SB-221, I wish it had
> been
> > > around when I build a tuned input board for my Clippertron L, all the
> > > other
> > > tuned input boards do not work on the WARC bands and cost 150 dollars
> > > compared to 125 dollars for the AT-100AMP and this board is automatic
> with
> > > memories. The only thing you will have to watch out for is that your
> RF
> > > choke does not resonate on the WARC bands. I changed my choke to the
> RF
> > > Parts one at a cost of 25 bucks, it works for 3-500's and 572b's and
> will
> > > not resonate on the WARC bands.
> > >
> > > Mike
> > >
> > >
> > > Gentlemen,
> > >
> > > I need opinions from the experts that live here. I have an SB-220
> > > that does an excellent job on the pre-WARC bands, however it doesn't
> > > like 12 and 17 meters very well, thanks to the tuned input circuit
> > > from what I understand. I noticed that the good folks at LDG
> > > Electronics is now selling a stripped version of their AT-100
> > > autotuner as the AT-100AMP, marketed as an RF amplifier tuned input
> > > board for homebrews and the like. My question is, could this board be
> > > fitted into the SB-220 without much pain? Would this solve the WARC
> > > problem?
> > >
> > > If so, would it work in the SB-200 as well? I have no clue with 572s.
> > >
> > > Lazy and looking for the simple way out -
> > >
> > > Ed
> > > WA4RYW
> > >
> > >
> > > _______________________________________________
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> > >
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> >
> >
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