K5GW is right on the money. A quick glance at the M2 webpage places the
stacking for the 6M7JHV at:
Stacking Distance, Max: 27' Wide, 25' High
As someone else also pointed out, call M2 and speak with Mike or one of the
others. IMHO, if you do not put them too high, they will be a killer combo
with a stackmatch, say 35 and 60 feet. Cheers.
I had a small stack of 3-element yagi's at 22 and 37 feet in the early
nineties and worked the world with them. In fact, I worked VK3OT two years
in a row at the 10 and 150-watt levels.
73 de Steve, NL7W
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of TexasRF@aol.com
Sent: Monday, July 12, 2004 7:08 AM
To: keith@dutson.net; towertalk@contesting.com
Subject: Re: [TowerTalk] Stacking Distance for M2'd 6m7JHV?
Max stacking gain for dipoles is 5/8 wavelength. Max stacking gain for yagis
varies with boom length. For the 6m7JHV with a 30ft 8in boom length,
stacking
distance will be in the 25 to 26ft range. As always, before cutting and
drilling the stacking should be confirmed by one of the yagi modelling
programs.
You can stack closer but the maximum realizable stacking gain will not be
reached. In this case, you could be better off with a single longer yagi
than
understacked yagis. If the stacking is wider than optimum, the gain doesn't
suffer but the main lobe becomes skinnier and other grating lobes become
higher in
amplitude.
73/k5gw
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
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http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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