By the way, Jim. My loop was only about 3' high on the bottom 40' run and about 13' at the apex.
Charlie, K4OTV -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of James Rodenkirch Sent: Monday, August 05, 2013 3:23 PM To: [email protected] Subject: Re: Topband: best core material? 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" <[email protected]> > > To: <[email protected]> > > 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 _________________ Topband Reflector
