Thanks Stan. I would love to have an antenna like you described but
it's just not possible in my present situation. I wouldn't even have
room on the ground to build it.
73, Gerry KA2MGE
I also agree with what Karl said but I believe the average improvement
over a dipole for this antenna on 20 and 15 is likely to be less than
4 dB. A full sized, computer optimized 3 element monoband Yagi will
have about 5-1/4 dB over a dipole. Their manual says forward gain is
9.5 dB (should be dBi) That could be true for peak gain at some
frequency on 10m but absolutely is not true for 20 and 15. The TH6DXX
was designed fifty years ago and was an unbelievably good design at
that time. You have aluminum tubing which is as good or better than
what you could buy today. You may not want to do this but a good
project would be either find some more tubing or buy some new tubing
to go with what you have and use the 24 foot boom to build a 12
element antenna with 3 on 20, 4 on 15 and 5 on 10m ( full sized
elements). I’m sure if your traps are good someone out there would
like to buy them. You would also have the option of making a Yagi with
full sized elements that would include 17 and 12 meters. The result
will be a lot more gain (1-2 dB is huge), better F/R and a low SWR
across the entire 20 and 15m bands and about 800 khz of 10m. You would
never use an antenna tuner. It would survive more than 80 mph which
Hygain claimed and more ice load. The antenna will probably weigh less
and you will not have the worries associated with all those traps. It
would be nice to know you have the very best you could do with
whatever boom length and most likely never have to take it down for
repair. Stan, ZF9CW >_ On Nov 8, 2024, at 12:40 AM,
maflukey@gmail.com wrote:_ >_ _ >_ Just reiterating Rick's comment
about Hygain baluns... I think there may_ >_ have been a couple of
different models, but I've acquired nine used Hygain_ >_ monobanders
over the years and the baluns that came with all of them were_ >_ not
worth reinstalling. So, I second Rick's advice to get decent balun
for_ >_ your antenna. Also, some folks have said that getting the
driven element_ >_ adjusted properly on a TH-6 is a bit of a PITA. If
you have any way to do_ >_ that and mark it ahead of time it might
save you some frustration up on the_ >_ tower later._ >_ _ >_ 73 &
good luck on your project._ >_ _ >_ Matt_ >_ KM5VI_ >_ _
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