[TenTec] Antenna help
jrichards at k8jhr.com
Tue Dec 30 00:57:32 EST 2014
Your comments reinforce JB's suggestion to visit the ARRL Antenna Book,
and perhaps the ARRL Handbook, and maybe research additional books on
wire antennas. There are several web sites devoted to this type of
antenna. One operator who who regularly checks into my Brand X radio
owner's net has a lovely 80m loop and he has done a lot of research on
that type of antenna. It seems worthy of serious study, and surely
there is more to it than one might learn from a few brief, well said
answers from the helpful volunteers on this list. From Peter's
comments, it appears manifest getting it right could have significant
benefits, and getting it wrong could present serious problems.
That is just MY take.
On 12/29/2014 10:32 PM, Peter Bertini wrote:
> Wow, lots of questions...
> But, you need to know the feedpoint impedance of the loop... and regarding
> the feed line, you do realize that it is most likely going to work as a
> matching (or MISmatching network) depending on its electrical length? It
> would impossible to recommend either a 4:1 or 1:1 balun unless the antenna
> has been modeled and these important parameters known.
> There are some nice snap-on molded spreaders that are designed to be used
> with THNN electrical wire--they work quite well.
> By the way, some time back I tried a similar setup, and ended up with
> extremely high RF currents--end up melting PL-259 and SO-239 fittings,
> damaged a Dentron 3kW tuner, and blew the snot of out a 1:1 DX Engineering
> balun--which was at a high voltage point.
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