[Antennas] 30 Meter Inverted Vee on 10M?

Sat Dec 2 17:01:28 EST 2006

Hi All,
I'm in the process of putting all my antennas back up after having taken 
them down for some Home maintenance (siding). The old 40M Inverted vee is 
being replaced by a 40 foot long Alpha Delta DX-EE 4 band (40, 20, 15 & 10M) 
wire antenna as it fits this "short" lot much better (the 40M Vee had to be 
folded back on itself some).
Now, I'm considering cutting down the 40 M Inverted Vee for use on the 30 
Meter band. It will be located on the pole supporting the North End of the 
DX-EE and will be at right angles to the DX-EE. If my math is correct, it 
appears that if I cut it for 10.1MCS the 3rd Harmonic resonant point will 
fall in about the 30.3MCS area.
QUESTION: Anybody have any idea about how wide of a bandwidth I could 
expect from this critter? I'd like to also use it on 10M (when that band is 
open) to give me an additional antenna for that band (in addition to the 
DX-EE). I suspect the bandwidth at 30+MC will be wider than it's bandwidth 
would be at 10MCS.
By the way, the first antenna was put back up yesterday, the roof mounted 
Butternut HF-2V for 75/40M. It's tuning changed slightly, probably because 
the aluminum awnings on either side of the mobile home were raised slightly 
and/or placement of the ground radial wires I have laying across the metal 
roof (to insure good coupling to all the individual metal sheets). It's 
also connected directly to the metal roof in two places. The SWR's are 
good, it 'seems' to be quieter than before and the signal reports that I get 
seem to indicate that it's performing very well (though only time will tell 
on that one). But that location above the metal roof has always proved to 
be good for a vertical antenna as it's surrounded on ALL sides by metal 
groundplane.
73 de Phil, KO6BB
DX begins at the noise floor!
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