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[TowerTalk] Force12

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Subject: [TowerTalk] Force12
From: (Bob Nielsen)
Date: Wed, 3 Oct 2001 08:35:25 -0700
On Wed, Oct 03, 2001 at 08:00:59AM -0400, Pete Smith wrote:
> My hunch is that when F12 first developed the C-3, the 15M SWR bandwidth
> was a little tight to enable them to stay under 2:1 across this wide band,
> so they specced the antenna on 15 using 100 feet of coax to achieve that
> magic number, which they thought was important for marketing purposes.
> And what does this magic number mean?  Almost nothing.  Without a tuner,
> some radios begin to fold back at SWRs well under 2:1.  Some amplifiers
> don't like a load much over 1.5:1.  Some radios, like my TS-930, soldier
> happily along into a 2.5:1 load.  Some amplifiers will drive loads up to
> 3:1, depending on the band (like my SB-220).  The practical advice is
> "don't worry about it."  Use enough feedline to get from the antenna on the
> tower to your rig, no more and no less (hi).

Stated somewhat differently, use as much tower as the length of the
feedline will allow.

Bob Nielsen, N7XY                
Bainbridge Island, WA            
IOTA NA-065, USI WA-028S 

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