[TowerTalk] Re: The Ultimate One Tower System

[Dave D'Epagnier]

Pete, I think you're (and they) are right. I was thinking the difference in
phase velocity between coax and air made the compensation unequal on the
different bands, but I think I now see the (speed of) light. I stand
corrected.

--Dave
K0QE

	----------
	From:  Pete Smith [SMTP:n4zr@contesting.com]
	Sent:  Thursday, December 16, 1999 9:08 AM
	To:  Dave D'Epagnier
	Subject:  RE: [TowerTalk] Re: The Ultimate One Tower System

	At 08:49 AM 12/16/1999 -0700, you wrote:
	>
	>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.

	Dave, I think Guy and Jay are right -- because a 5-foot offset, for
	example, induces twice the phase shift on 10 that it does on 20.
Inserting
	a 5 x VF length of coax would introduce the right amount of
compensation on
	each band.

	73,  Pete N4ZR

	Don't forget to update your entry in the contest station database
	http://206.102.70.3/search.htm

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