[TowerTalk] Multi-Band Verticals
ve7hcb at rac.ca
Wed May 7 11:27:10 EDT 2003
What is the cost?
How does it compare to the screwdriver type ( continuously, remotely
The screwdriver appears to not need so many radials as it is used mainly
mobile, is this so?
I think that the main comparison should be, power into antenna system vs
power at a receiving antenna (same Rx)
Chris opr Ve7HCB
At 08:31 PM 2003-05-06 -1000, you wrote:
>Ward wrote, in part:
> > In my experience, most multi-band verticals that work on
> > more than three bands start to become seriously compromised
> > on the lowest band. Sometimes they are compromised on
> > the highest band, as well.
> > Like Steve said, we have written about this extensively in
> > our Antenna Test books.
>Well, I would suggest that the Fluidmotion BigIR vertical be
>one of the next ones you fellows test. I have one out here;
>up on the roof with 28 33foot radials, spaced about 13 degrees
>from one another. The length of the radiating element is
>set by stepper motors, and is very accurate and provides
>amazing low swr and super radiating efficiency on all the
>bands I have tried: 40, 30, 20, 17, 15, 12, and 10. Also
>covers 6m, but I have no rig for that band!
>There are no "hoo haws", traps, etc. Just a variable length
>radiating element. Try one, you will be surprised.
>73, Jim KH7M
>See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
>Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
>any questions and ask for Sherman, W2FLA.
>TowerTalk mailing list
>TowerTalk at contesting.com
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