On 10/1/17 4:21 AM, N1BUG wrote:
I've been reading the fan dipole discussion with much interest. I have
used fan dipoles for many years, as inverted V, common center point with
the ends tied off separately. The biggest one (a club project) had 6
wires for 160/80/40/20/15/10. It worked OK but that was a lot of rope!
Currently I have individual inverted V antennas for each of several
bands all supported from various points on one tower. I would like to
reduce the number or ropes tied off everywhere.
If you have successfully constructed and used a fan dipole where one or
more more wires hang from the first and each end requires only a single
support rope I would like to see details of the construction. I have
made a few attempts and seen some others but they all either suffered
from the lower wires sagging, constantly breaking spreaders or both.
Isn't this much like the Alpha-Delta series of antennas - multiband
dipoles with parallel wires separated by a few inches. Sure, there's a
lot of interaction when tuning it, but you only have to do that once to
get it close.
https://www.alphadeltacom.com/pg1.html
Then, a tuner at the shack can take out the last little bit of error
(it's not like you're trying to match a 80m dipole on 40m.. it's more
like you're trying to match a 39.5m dipole on 40m)
Ideally (and this may be too many wires to be practical) I would like to
construct an 80/60/40/30 meter fan dipole requiring only a single rope
at each end. Major project is OK if the end result is viable.
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