Mark W4SVO has been hard at work building this project. He will be All Bands
in CQWW and busy testing out his new duo band phased array. Check this toy
out. Good luck Mark and we wish you a big score!
73,
Ralph K1ZZI
----- Forwarded Message ----
From: Mark Luhrman <w4svo at att.net>
To: nq4i at contesting.com; w4uwh at tds.net; Jim <dino at digital.net>; jrcccd
at aol.com; Jim <jimns1l at hotmail.com>; ky5rtim at gmail.com; k4zz at
sc.rr.com
Sent: Wed, October 20, 2010 8:03:42 PM
Subject: 40/80 Meter Phasing System
Hey all, Finally finish today. You can see a lot of work went into this
project, I first order all the parts back in the first week in August. It was
hard finding the time to do this array. A lot of planning went into it. I
always wanted a phased array on 80 meters. So far it seems to work very well.
The 39 deg. delay line for 80 is under the 157 degree SW feed line, in the
picture. I stacked these on one another. On 40 meters the two verticals are a
1/4 wave apart and fed 90 degs. out of phase. To do this you have to feed each
vertical with an 84 deg. line. Then you switch a 71 deg. line in to get the 90
deg phase. I can go NE and SW, plus broadside. On 80 meters the two verticals
are an 1/8 wave apart and fed 135 degs. out of phase. To do this you have to
feed each vertical with a 157 deg line. Then you switch in a 39 deg. line to
get the 135 deg phase. I can also go NE and SW, plus broadside. In order to
switch from 40 to 80, it takes three separate relays, one at each vertical, to
switch the feedlines (84 and 157 deg.) and one box to switch to either the 40
meter box or the 80 meter box. I switch all of these at the same time. Then you
have to have two relays in each box, 40 and 80. These relays give you the
NE,SW, and broadside positions for each band. This is a great system for
someone that has a small yard and wants to get gain on both 40 and 80. Anyway
thanks for all the support. I know I will have a lot of fun using this duo band
array. Mark
----- Original Message -----
From: Ralph K1ZZI
To: secc at contesting.com
Sent: Thursday, October 21, 2010 5:35 PM
Subject: [SECC] CQWW SSB Contest Coming Oct 30th
Announcing:
The 2010 CQ WW DX Contest
Phone: October 30-31
Starts 0000 GMT Saturday Ends 2400 GMT Sunday
Fall is officially here and the contest season is about to blast off with the
majors. I hope everyone got the shack and antenna projects completed and ready
to go? Tell us what you been up to this summer getting ready?
Mark your calendars for this big event. Is anyone interested in having teams
and a little internal competition? Ideas or suggestions? Tell us what you
want.
Ralph K1ZZI
SECC VP
k1zzi at comcast.net
CQWW Rules: http://www.cqww.com/rules/CQWW-Rules-2010.pdf
--------------------------------------------------------------------------------
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SECC mailing list
SECC at contesting.com
http://lists.contesting.com/mailman/listinfo/secc
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