Hi Tom, I'll bet the Versatuner will do the trick. I
used to use my versatuner 2 for just that when I had
the realistic full coverage receiver from the mid
80's, don't remember the model, but it would get
blasted on the low bands from the a.m. stations that
were within a few miles of my house back in Arizona,
and the versatuner cleared most of that up, even in DX
mode on the rig.
--- Tom Behler <[log in to unmask]> wrote:
>     Lou:
>
> I have an MFJ versatuner somewhere around here, and
> I may just try it with
> the THF6A on short-wave frequencies just to  see
> what happens.  I have real
> front-end overload problems with an Icom W32A
> dual-bander that I use as my
> 2-meter and 440 HT in the office at the University
> where I teach, and
> haven't figured out how to deal with that yet.  The
> versatuner, of course,
> is only for the HF frequencies, so that won't help.
>
> Anyway, interesting ideas here.
>
> Best 73 from Tom Behler: KB8TYJ
>
> ----- Original Message -----
> From: "Louis Kim Kline" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, April 24, 2004 12:11 AM
> Subject: Tuning Receiver Front-Ends
>
>
> > Hi to all.
> >
> > Reading Mike's post reminded me of a wonderful
> little passive preselector
> > that I picked up at a hamfest for tightening up
> some receiver front ends
> > that weren't very tight.  In my case it was the
> Icom IC-R100, but I
> suspect
> > it is the same kind of challenge that Mike has
> found with the THF6A.  The
> > preselector that I found to be so helpful was the
> Grove Enterprises TUN-3
> > Receiver Preselector, and it was "heads and
> shoulders" above the Ten Tec
> > antenna tuner that I used on the HF rigs, when it
> came to tuning out
> > unwanted signals on the receiver.  It consisted of
> a series LC circuit
> that
> > used a 365 mFd variable capacitor of the type
> commonly found in AM radios,
> > and a inductor that was tapped for the various
> tuning ranges.  The
> > preselector covered 100 kHz to 30 MHz.  While the
> tuning was pretty broad
> > above 12 MHz, it was actually quite sharp in the
> medium wave and long wave
> > frequencies.  Even at shortwave frequencies, I
> could get enough Q out of
> it
> > to dramatically improve the performance of the
> Icom R-100 which was prone
> > to intermod and front end overload problems.  Even
> though the R100 has
> been
> > sold long ago, I hung onto that preselector, just
> in case I get another
> > receiver that is a little loose.  I wonder if
> something like that would
> > clean up the THF6A?
> >
> > 73, de Lou K2LKK
> >
> >
> >
> > Louis Kim Kline
> > A.R.S. K2LKK
> > Home e-mail:  [log in to unmask]
> > Work e-mail:  [log in to unmask]
> > Work Telephone:  (585) 697-5753





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