On 9/29/19 9:45 AM, Wayne Kline wrote:
Scott,
I hate to trash a specific manufactured antenna with 1000 of the A3S over
the world there a creature of the past.
Stan hit the nail on the head . the original 3 band trapless antenna Was
Tom’s N6BT C-3 antenna Small Light and easily fabricated.
There are other co’s have the same trapless antennas but coast $$$$
The C-3 and its friends are very clever designs with 3 bands interlaced
on one boom, but with just aluminum tubing. With modern modeling tools,
you can probably customize the design a bit if you want to use different
size tubing, have it optimized for a different frequency in the band, etc.
One thing to remember about clever designs (and especially, optimizing
such designs) is that they can sometimes be sensitive to assembly and
tolerances. That's where modeling comes in handy, you can skew an
element by a few degrees, or make an element 1" shorter or longer and
see what happens.
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