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
> >
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|