Pete... the spiral is a great idea...except for when the antenna is mounted
only a short distance above the tower top. 73, Jerry K3BZ
----- Original Message -----
From: Pete Smith
To: Alan AB2OS ; towertalk reflector
Sent: Monday, June 14, 2004 8:09 AM
Subject: Re: [TowerTalk] Rotators again
At 07:45 AM 6/14/2004, Alan AB2OS wrote:
>So you are saying that running the coax down through the mast and rotator
>doesn't really allow one to dispense with a rotor loop?
>
>That was another of the things I liked about the AlfaSpid -- although, if
>I am reading their online info. correctly, these things are significantly
>more expensive than I thought: exchange rate problem?
Second question first -- The US dollar has declined considerably against
both the Canadian dollar and the Euro; I assume that the AlfaSpid rotators
are imported from somewhere in Europe or JA.
I think K8RI has a good point -- the 360-degree twist would not be good for
either the coax or any connectors. However, I've often wondered why more
hams don't use the trick that seems to be universal on the TV trucks with
the pneumatic masts -- they wind the coax around the mast instead of having
a free-standing loop. All you do is run the rotator to one stop
(clockwise, for example) and then wind the coax around the mast 3-4 turns
in that direction. As the rotator turns counterclockwise, the coax wrap
simply gets somewhat looser. Secure at both ends to prevent stress on
connectors and you're done.
73, Pete N4ZR
The World HF Contest Station Database
was updated on June 5, 2004
2728 contest stations at
www.pvrc.org/WCSD/WCSDsearch.htm
_______________________________________________
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_______________________________________________
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.
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