[WVDXA] 6 M Beam

[Charlie Young]

Clark, thanks for that link.  The antenna construction in your link is identical to the Cush Craft 12-4CD construction in the way the elements are mounted and configured, including the driven element.  The only difference will be the tubing diameter; my antenna would have larger diameter tubing, thus the element lengths will be somewhat shorter than yours. Once I get the driven element adjusted, the dimensions on your could be scaled to mine and it should work. 
 
I found all the parts except the boom to mast clamp, and one piece of the gamma match assembly, which happens to be the one where the SO 239 mounts to the antenna.  I will jury rig something for now. 
 
Thanks for your help. 
 
73, Charlie N8RR  > Date: Fri, 11 Jul 2008 23:06:06 -0400> To: wvdxa at wvdxa.org> From: w8tn at ntelos.net> Subject: Re: [WVDXA] 6 M Beam> > Charlie,> > Wow, that's great! Hope the finalizing of the job all go smoothly > for you.> > Here is a link to my 4-L yagi instructions. You could check the > tubing size on it and see if it is close. It is just a 12-foot boom but > that should get you in the ball park.> > http://www.directivesystems.com/PDF/DS50-4.PDF> > I think the 6-M band died today but that is the way it works. Maybe > tomorrow it will be back.> > Let me know when you have it operational. I'll be glad to give you a > signal check or anything else I can do to help with your project.> > > Clark, W8TN> > > > At 02:54 PM 7/11/2008 -0500, you wrote:> >Although technically I don't retire until July 31, as of yesterday I > >completed (hopefully) the last of my transitional activities at work, and > >can concentrate on other things now. The only thing remaining to do is > >drive to Cleveland and box up my papers. Good excuse to visit AES one > >more time next week.> >Clark: I will call them to see if they will replace or copy the HFTA CD > >that I broke from the Antenna Book. I heard zip back from ARRL; guess the > >wrong people were asked.> >> >I knew there was an antenna (yagi) here that was never assembled. Sometime > >or other, it came in a trade. Thought it was a small 3 el 10M, but it > >turns out to be a 12-4CD Cush Craft, which is a 4 el 12M yagi on an 18' > >boom. The box was dry rotted and tossed, but I think the hardware is all > >there. I am sorting it out now. I found the manual for it.> >> >If I can figure out the element lengths with the tubing taper, this should > >work on 6M. My thought is to do the driven element first, adjust it to > >resonance with the MFJ 259, then scale the reflector and directors from > >that. It uses a gamma match. Should be able to modify that to work as well.> >> >Anybody have any alternative ideas as to the best way to adjust this thing > >for 6? My antenna book had a program to calculate element lengths > >considering taper, but the CD got broken.> >> >I would appreciate any suggestions. Yes, I could (and likely will) buy a > >M2 6M7JHV, but this thing is here, I have no interest in 12M, and I should > >be able to throw this together this weekend. I would like to hear a JA on > >6M! HFTA says 10' will work great overlooking my steep hillside.> >> >73, Charlie N8RR> >> > > _______________________________________________> WVDXA mailing list> WVDXA at wvdxa.org> http://wvdxa.org/mailman/listinfo/wvdxa_wvdxa.org
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