Discussion in 'Antennas, Feedlines, Towers & Rotors' started by KC8VWM, Nov 14, 2011.
Thes swr is excellent on all bands
Very helpful thread. I'm still waiting for my 6-way hub.
Charles, can you confirm that the actual length of the spreaders (not the feedpoint arm) is somewhere around 6-6 1/2 feet out from the center of your hub?
I've been looking through all the different cobwebb sites trying to determine the actual spreader length needed and I mostly find element length info instead.
I have my 9' poles on the spider now and I just realized I may very well get by with another 3' section removed if this 6' + measurement is correct (Mine are mounted on short PVC arms on my 12" square plate so 6 feet of fiberglass should work out to around 6' 4" spreader length total). If so this would be great as it would be more compact and lighter; my "MIL SPEC" version is getting heavy!
73, Jeff (with cobweb in progress; been working on the balun today...)
On my cobweb the 20m wires are attached at a distance of 72.25" along the spreaders from the centre of the hub; there will be some slight variation depending on the wire type you use and its velocity factor.
Thanks, Steve; inasmuch as I'm using the same type of wire 1mm/2mm insulation as you it appears that I'm good to go with the 6 footers plus a tiny bit.
Yup, 6-6 1/2 feet is just fine. Anything longer is just extra. Good luck with the project Jeff.
Thanks, Charles; That's really good news.
Today I'm winding the balun cores and it's going smoothly so far. I'll post more pix on my DIY cobweb thread again soon.
I think I am just as excited to see it in the air as you are.. I will stay tuned.