[SixClub] Re: [50mhz] FS: new 6M 1.5wl yagi, stack match, plus some other goodies

[Bill Cotter]

Carl,

You seem to have a winning design, based on your numbers. How about 
sharing the YO file with the list. I think many of us would 
appreciate having this data to build a similar design.

Tnx and 73 bill n4lg


At 07:54 PM 3/3/2007, jeremy-ca wrote:
>The OWA concept has been around a long time before Cebik's article 
>and I first read of it in German and US UHF articles highlighting 
>very high performance 432 mHz arrays that could perform under all 
>weather conditions. This was back in the 80's.
>
>My own experience was taking a 6 el Cushcraft boomer and spending 
>some serious YO and NEC time on it. The end result was 8 elements 
>with 11.1 dBd at 50.1 mHz with a 37 to 42 dB complete 180* f/r up 
>to 50.5 mHz and an almost flat VSWR curve over that range. It has 
>been in operation for 17 years and is a proven performer chasing 
>DX, contesting or yakking on 50.4 AM.
>Snow and ice has no noticable effect.
>
>I also have 28' boom 432 antennas built to this criteria and have 
>redesigned several other commercial 6M yagis for others that 
>exhibit similar performance results.
>
>Carl
>KM1H
>
>
>----- Original Message ----- From: "Gary - N3JPU" 
><n3jpu at speakeasy.net>
>To: "'World Wide Six Meter Club'" <sixclub at mailman.qth.net>; 
><50mhz at mailman.qth.net>; "'VHF Reflector'" <vhf at w6yx.stanford.edu>
>Sent: Saturday, March 03, 2007 5:02 PM
>Subject: [50mhz] FS: new 6M 1.5wl yagi, stack match, plus some 
>other goodies
>
>
>Put up a new 60' tower and new antenna for 6M. Originally planned 
>to stack a
>pair of the 1.5wl yagis but did not realize how robust the Force12 
>antennas
>are so settled on just one of them. This is a OWA design on a 30' 
>boom.
>Check out Cebik's articles on the OWA design for VHF
>(http://www.cebik.com/qex/owa.pdf). As I mentioned this is a very 
>robust
>antenna. Elements are .75" for the 12" center section, tapering to 
>.625" for
>18" then to .5" tips. The boom is 2" diameter end to end with the 
>walls
>being .125" except for the 6' end pieces being .058". The design 
>calls for
>no truss. I have modeled this with MultiNEC and YW and it's right 
>on what
>Force12 claims as true gain of 10.6dBd and 25dB FB. SWR curve is 
>very broad
>which came in handy last week when we had a heavy and wet snowfall. My
>EF-906's SWR did not budge when there were M2's in the area that were
>unusable.
>
>Being a OWA design it uses a split driven element and I have for 
>it a new
>high quality Array Solutions W1JR 1:1 balun with N connector.
>
>I have not had any openings yet since I put my other EF-906 up but 
>I do work
>regularly from FM19lc up into FN32 with QSO's that span an hour or 
>more.
>That is 325 miles and I am only using 100W.
>
>----------------------------------------------------------------------------
>-
>
>New in the box:
>Force12 EF-906 30' 10.6dBd Lists for $599.00
>http://force12inc.com/F12-6mtr-info-001.htm
>
>Array Solutions W1JR-50-3N Balun N Lists for $94.75
>http://www.arraysolutions.com/Products/baluns.htm#5%20kW%20Balun
>
>Array Solutions BMP-4 Mounting Plate Lists for $14.00
>http://www.arraysolutions.com/Products/baluns.htm#Mount
>
>DX Engineering DXE-SAD-200A 2" Saddle Clamp Lists for $8.40
>
>Asking $600 for all above.
>
>----------------------------------------------------------------------------
>-
>
>New and never used:
>Array Solutions Mini-Stack Match 6M with N connectors. List for $148.
>Asking $130
>http://www.arraysolutions.com/Products/stackmatch.htm#MiniStackMatch
>
>----------------------------------------------------------------------------
>-
>
>New and never used:
>Yaesu GS-065 Thrust Bearing (Mast Diameter 1 1/2 - 2 1/2") List for
>$59. Asking $45
>http://www.heightstowers.com/rotators.htm
>
>----------------------------------------------------------------------------
>-
>
>Gary Mitchelson
>N3JPU Montgomery Co. MD  FM19
>USAF MARS and SHARES: AFA1PU
>MD/DC State USAF MARS Director AFF1MD
>USAF MARS Technical Services Manager AFN1TS
>http://www.mitchelson.org/
>
>
>
>Moderator: Ray Brown, KB0STN
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----------------------------------------------------------
Bill Cotter, N4ALG             E-mail: n4alg at qx.net
173 Carolyn Lane               Home: (859) 887-5563
Nicholasville, KY 40356-9340   Work: (859) 323-6474

ARRL   ARCI #9878   QRPl #1646   QCWA #29393   FISTS #4535
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