You know that power loss doesn't equate to lost pattern gain, right?
Trapped tribanders have shorter elements, which has an effect on
pattern, and they have non-optimal element spacing for any particular
band, which again affects pattern gain.
I'm not saying that trapped tribanders don't have utility, but compared
to a modern non-trapped design they suffer from more than just the heat
they generate.
Dave AB7E
On 9/12/2019 12:55 PM, Glenn Pritchard wrote:
Trapped yagis don't suck up gain, another myth easily dis-proven. I have
used trapped yagis and mono banders over the course of 30+ years and at one
time had the big Wilson 40M3 I believe it was called, 3 full sized 40 meter
elements on a 40' boom..
It is shown that maybe a trapped yagi has at worst a 0.6 dB loss over a
full sized yagi of the same band. It's no surprise that I like trapped
yagis because of space restrictions right now and having the ability to add
40 meters to one is skookum.
I would like to have mono banders only for 40 and 20 again, perhaps one day.
Glenn, VA7UO
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