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## [TowerTalk] Re: The Ultimate One Tower System

 To: [TowerTalk] Re: The Ultimate One Tower System k2av@contesting.com (Guy Olinger, K2AV) Thu, 16 Dec 1999 11:48:34 -0500
 >The velocity factor in the coax is the same on all bands (of course), but >the amount of phase shift between the two antennas will be different on >different bands if unequal line lengths are used. The horizontal offset >between the two antennas can only be compensated for on one band with this >technique. If the phase length of the free space horizontal offset (FSHO) is xdeg on 20 then it is 21/14 * xdeg (or 3/2 * xdeg ) on 15, and 28/14 * x (or 2 * xdeg) on 28. If the coax is .66 VF, then the length of coax offset to match is 2/3 FSHO. 2/3 * 1/VF = xdeg on 20, 3/2 * xdeg on 15, and 2 * xdeg on 10. The phase shift varies by band, BOTH in the physical offset, AND in the coax. They vary in like amounts. This DOES assume that you are NOT using 72 ohm odd quarter wavelength matching devices, but a stackmatch kind of solution, that can accept varying distances to the load. > > ---------- > From: Guy Olinger, K2AV [SMTP:k2av@contesting.com] > Sent: Thursday, December 16, 1999 8:31 AM > To: towertalk@contesting.com > Subject: Re: [TowerTalk] Re: The Ultimate One Tower System > > > On Thu, 16 Dec 1999 10:06:00 -0500, you wrote: > > > > >At 09:03 AM 12/16/1999 -0800, Jay Terleski wrote: > >> > >>The offsets can be compensated for easily with a little longer >coaxial > >>calbe that acts as a delay line to electrically aliegn the driven > >>elements, when pointed in the same direction. > >> > >>Its already been done. > > > > > >On 3 bands with the same length of coax? > > Sure, you are compensating for a distance in the open with a piece >of > coax with that has the same velocity factor on the bands in >question. > It does assume that you are not using 1/4 wave matching sections and > the like, eg using a stackmatch type of matching. > > >73, Pete N4ZR > > > >Don't forget to update your entry in the contest station database > >http://206.102.70.3/search.htm > > --. .-.. > 73, Guy > > Guy Olinger, K2AV > k2av@contesting.com > Apex, NC, USA > > -- > FAQ on WWW: >http://www.contesting.com/towertalkfaq.html > Submissions: towertalk@contesting.com > Administrative requests: towertalk-REQUEST@contesting.com > Problems: owner-towertalk@contesting.com > Search: http://www.contesting.com/km9p/search.htm --. .-.. 73, Guy Guy Olinger, K2AV k2av@contesting.com Apex, NC, USA -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm
 Current Thread [TowerTalk] Re: The Ultimate One Tower System, (continued) [TowerTalk] Re: The Ultimate One Tower System, Pete Smith [TowerTalk] Re: The Ultimate One Tower System, Jay Terleski [TowerTalk] Re: The Ultimate One Tower System, Pete Smith [TowerTalk] Re: The Ultimate One Tower System, Guy Olinger, K2AV [TowerTalk] Re: The Ultimate One Tower System, Pete Smith [TowerTalk] Re: The Ultimate One Tower System, Barry Kutner [TowerTalk] Re: The Ultimate One Tower System, Kurt Andress [TowerTalk] Re: The Ultimate One Tower System, Greg Gobleman [TowerTalk] Re: The Ultimate One Tower System, Kurt Andress [TowerTalk] Re: The Ultimate One Tower System, Dave D'Epagnier [TowerTalk] Re: The Ultimate One Tower System, Guy Olinger, K2AV <= [TowerTalk] Re: The Ultimate One Tower System, Mike Nash, ND6A [TowerTalk] Re: The Ultimate One Tower System, Tom Osborne [TowerTalk] Re: The Ultimate One Tower System, Dave D'Epagnier [TowerTalk] Re: The Ultimate One Tower System, K7LXC@aol.com [TowerTalk] Re: The Ultimate One Tower System, Guy Olinger, K2AV Message not available [TowerTalk] Re: The Ultimate One Tower System, Guy Olinger, K2AV [TowerTalk] Re: The Ultimate One Tower System, Pete Smith [TowerTalk] Re: The Ultimate One Tower System, Dave D'Epagnier [TowerTalk] Re: The Ultimate One Tower System, K7LXC@aol.com [TowerTalk] Re: The Ultimate One Tower System, Nelson Moyer