I have a Gap Titan, and it works pretty well. I unfortunately have a fairly high noise level though. The Gap web site says the Challenger has three 25 foot radials, but also says it only requires 10X12 feet of space. 
--
Buddy Brannan, KB5ELV - Erie, PA
Phone: (814) 860-3194 or 888-75-BUDDY



On Oct 22, 2013, at 8:52 AM, Howard Kaufman <[log in to unmask]> wrote:

> I might be able to get my hands on a gap challenger.  I am not sure however 
> if I can put it up.
> 1.  How long are the three radials?
> 2.  where does the coax attach to the antenna.
> 3.  Does it need the guy ropes?
> 4.  Can I mount it on a porch?
> The ground spot is separated from the house by sidewalks and getting the 
> coax there would be a real challenge.
> 6.  Is their a way to get it to radiate on 17 30 and or 60 meters?
> H T Kaufman MSW LCSW
> Adaptive Technology Instructor 
> 
> 
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