[TowerTalk] Multi-Band Verticals

Chris BONDE 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 
controled inductor)?
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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