For the CQ WW I put up a 5 Element HyGain 10 meter beam(LJ-105CA) I
double and triple checked all the element lengths and the VSWR is so low
across the band it really excited me. It also scares me a bit as up in
the air the VSWR is never above 1.3 to 1 from 28.0 to 29.5. The problem
is that signals are very weak on non existent when compared to my 3
element quad at 80 feet which was the only antenna that worked on ten
during the contest and after.. ( The yagi is one a separate tower at 50
feet)
Here is what I have on it.
New piece of LMR-400 with good connectors fed directly to the insulated
(Hy Gain cup type) director.
The beta rods were missing so I use the direct feed to each director.
(OWA type matching idea)
I moved the first director slightly closer to the driven element to
obtain the correct match at 28.4 Mhz
Everything looks good but the 10 meter antenna is about as good as a
dummy load.
I have been building yagi's for over 50 years and have never had such a
strange problem. Even a beam with half the driven element missing after
a hurricane could hear something but what I have up can't.
Before I take it down I ask if anyone else had experiences with this
problem. It must be something very simple but I have checked everything
I can think of and still no joy here.
Please let me know
Herb Schoenbohm, KV4FZ
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|