[50mhz] 5 over 5 stacking recommendations

[cboone at earthlink.net]

Stacking spacing of horizontal elements can be from 0.5 to 1 wavelength. There is max gain around .625 or 5/8wl spacing....but its ~ 1db difference overall....a 1 wavelength spacing will reduce RF radiation into the shack (directly below the anntenna).
(Never heard of the rule using the boom length)

Chris
WB5ITT


-----Original Message-----
>From: Dave Edwards <kd2e at comcast.net>
>Sent: May 5, 2007 10:52 PM
>To: WD0T <wd0t at mncomm.com>, 50mhz at mailman.qth.net
>Subject: Re: [50mhz] 5 over 5 stacking recommendations
>
>At one time I had 4 element Hy Gains stacked. They are similar size to the 5 
>element cushcraft because they are full spaced elements. At that time the 
>rule of thumb when stacking was to seperate them by the boom length (12 
>feet)
>It worked for me for many years!! The phasing harness has to be exact also. 
>As I remember,  I had two types of coax in the harness.
>...Dave
>----- Original Message ----- 
>From: "WD0T" <wd0t at mncomm.com>
>To: <50mhz at mailman.qth.net>
>Sent: Saturday, May 05, 2007 9:44 PM
>Subject: [50mhz] 5 over 5 stacking recommendations
>
>
>Greetings all, first time posting here!
>
>I have a question on recommended stack spacing, for using 2 cushcraft 5 
>element 6m yagis, looking to put 2 up on a short crank up tower for the June 
>VHF contest.  By short tower I mean a 30ft to the lower 6m antenna. I am 
>talking about stacking one above the other.
>
>What would you recommend for stack spacing using 2 of the CC 5 element, 
>stock standard yagis?  Max gain would be nice, but also I need to not get 
>crazy in terms of spacing distance.  I have seen in some places 
>recommendations for .6 wavelength spacing for lower sidelobes, however I 
>have also read that each type of antenna and height needs to be modeled to 
>arrive at optimum spacing.
>
>Any help, thoughts certainly appreciated.  Thanks so much.
>
>73 God Bless! Todd WD0T
>DN94, Pierre SD.
>Moderator: Ray Brown, KB0STN
>_______________________________________________
>50mhz mailing list
>Home: http://mailman.qth.net/mailman/listinfo/50mhz
>Help: http://mailman.qth.net/faq.htm
>Post: mailto:50mhz at mailman.qth.net 
>
>Moderator: Ray Brown, KB0STN
>_______________________________________________
>50mhz mailing list
>Home: http://mailman.qth.net/mailman/listinfo/50mhz
>Help: http://mailman.qth.net/faq.htm
>Post: mailto:50mhz at mailman.qth.net