[TowerTalk] Fan dipole construction methods

[jimlux]

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.
>