Thanks to all that replied - VERY informative information as well as anecdotal
evidence the small delta loop receive antenna works well AND at a lower height,
which I was thinking of doing but not sure if that "mod" would alter the
antenna's efficacy all that much!
Suggestion that I use a binocular core understood and I will go that route - a
friend of mine will wind the binoc core for me (have severe neuropathy and
can't handle small stuff like that at all!).
Great group of participants here - thank you for the advice/suggestions!
72, Jim Rodenkirch K9JWV
--- Original Message -----
> > From: "James Rodenkirch" <rodenkirch_llc@msn.com>
> > To: <topband@contesting.com>
> > Sent: Monday, August 05, 2013 1:33 PM
> > Subject: Topband: best core material?
> >
> >
> > >
> > > I have a schematic for a delta shaped loop that shows I'll need an 18:1
> > > transformer to transform the 950 ohms of the antenna to 50 ohms (feeding
> > > it with 50 ohm coax).
> > >
> > > One transformer diagram shows an FT-140-43 core being used.
> > >
> > > BUT, looking over some of Tom's, W8JI, write-ups, I see where he uses 73
> > > material instead.
> > >
> > > I see where 77 material replaced 73 material so -- is an FT-140-77 the mo
> > > betta way to go?
> > >
> > >
> > > Thanks, in advance, for any advice/info. Jim Rodenkirch K9JWV
> > >
> > >
> > >
> > > _________________
> > > Topband Reflector
> > >
> > >
> > > -----
> > > No virus found in this message.
> > > Checked by AVG - www.avg.com
> > > Version: 2013.0.3392 / Virus Database: 3209/6552 - Release Date: 08/05/13
> > >
> >
> >
> >
> > -----
> > No virus found in this message.
> > Checked by AVG - www.avg.com
> > Version: 2013.0.3392 / Virus Database: 3209/6552 - Release Date: 08/05/13
> >
>
> _________________
> Topband Reflector
_________________
Topband Reflector
|