[TowerTalk] QUAD FEEDING

[daniel hearn]

Bob, I just received my copy of the vol.7 Antenna Compendium and Cebik has
an article in it re various methods of feeding multiband quads with the pros
and cons. 73, Dan, N5AR

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com]On Behalf Of Bob T.
Sent: Wednesday, March 23, 2005 7:36 PM
To: towertalk at contesting.com
Subject: [TowerTalk] QUAD FEEDING


I'm ready to put a Lightning Bolt 2 element, 20/15/10m quad up at 80ft. I
want to do this right the first time, and get the best reasonable
performance from the antenna. Lightning Bolt supplies a 2:1 balun for a
common feedpoint. The owner of the company sez this is the best way to feed
the antenna for max performance, anyone who sez otherwise is wrong. But...he
can't supply figures or pattern pics. Others favor the gamma match method,
but still I haven't seen any concrete evidence that this is the best way.
(believe me, I've scoured the web) Still others say a common feed point
(feed line)is just no good; the only way to go is seperate feedlines for
each band. Still no facts or figures to back up this claim. I am primarily
concerned with maximum forward gain and a fairly good pattern. I won't
quibble over .5-1.0 db or so. If it makes any difference, I am also
interested in integrating a 3 element 6 meter quad on the same boom.
(seperate feed) and/or mounting a loaded 40 mete
 r dipole along the boom of the quad. So, who has the facts? Please, no
educated guesses or second hand anectdotes. Thanks.
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