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On Jun 13, 10:10*am, Richard Clark wrote:
On Sat, 13 Jun 2009 01:08:24 -0700 (PDT), wrote: Oh well, some more cable along with a UHF/ VHF splitter (combiner) and that big Winegard in the garage will hopefully cure it. By this little snippet of what was intended as an aside may, in fact, be your solution for VHF. *Given your predicament of "code" (arbitrary or otherwise), you can put the cable to work. The solution is called a "Franklin Antenna." *It would be disguised as an antenna cable (or telephone cable, or power line, or other innocuous wire) that trails up (to something innocuous), but never connects (who is going to look? *and if they did, it could always be a dummy connection). A Franklin antenna is a stacked, gain antenna that is very colinear (hence the cable motif). *These are most often described on the Web for home wi-fi or bluetooth applications, but with scaling you can bring them back down into the TV VHF band. *A quick search gives:http://www.para.org.ph/membersarticl...velopment%20of %20Coll... which on page 11 gives a pictorial representation (I can't say I vouch for the entire paper, but it is representative of the topic). 73's Richard Clark, KB7QHC I hung the spectrum analyzer on the Winegard all channel antenna in the rafters of the garage. The VHF channels are strong and free of response 'bumps' (meaning no serious multipath) and the UHF may be better than the squareshooter on the roof. Tomorrow I shoot a hole in the stucco wall to get the new RG-6 coax (crazy guy at Torrance Electronics sold me 100 ft for $9) pulled in to the splitter to feed the computers and STB. It looks like it will be good. G² |
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