[TowerTalk] 6 meter antenna comparisons

[Larry Banks]

Hi Steve,

I have not used either of these yagis -- mine is a HB 7 el on a 22' boom --  
so here is my opinion.  (And remember, my opinion is free -- probably what 
it is worth.)

Since forward gain is a strong function of antenna length in wavelengths --  
and if I remember, doubling the length adds 3 dB in gain -- the CC 
theoretically will have more forward gain.  Perhaps 1 dB?  HOWEVER -- more 
elements allows the antenna designer to tailor the pattern better, so 7 
elements might allow M2 to improve Front-to-rear and sidelobes, making that 
one quieter and giving a better S/N to your wanted signal.

My opinion -- it really will depend on the pattern.  Try to find some 
patterns for these two and compare them.  My GUESS is to go with the M2. 
And remember, I have no experience with either of these two yagis.

73 -- Larry -- W1DYJ




----- Original Message ----- 
From: "Steve K7AWB" <k7awbgoog at gmail.com>
To: <towertalk at contesting.com>
Sent: Saturday, April 13, 2013 7:19 PM
Subject: [TowerTalk] 6 meter antenna comparisons


>I have a choice of two 6-meter yagis to put up at the 112 foot level on my 
>tower.  A Force 12 5BA ( 5 band, 15 element HF) goes at the tower top at 
>103 feet and above it about 9 feet will be the 6-meter yagi.
>
> I have both a used M2 6M7 (7 element) and a Cushcraft 617-6B (6 element). 
> I don't want to use my 6M7JHV because I am saving it for an array latter.
>
> The M2 6M7 is rated at 10.5 dbd while the Cushcraft is rated at 14 dbd in 
> the manual although, in the VE7BQH list, is shows at 10.17 dbd and I take 
> company specifications with a grain of salt.  The Cushcraft has a 34 foot 
> boom while the M2 has a 26.5 foot boom; both weigh about the same.  The 
> VE7BQH list is at: http://www.bigskyspaces.com/w7gj/6mTable.htm
>
> Anyone have any opinions on which one to use?  The purpose of the antenna 
> is to work the "weak" ones.
>
>
> 73
> Steve Sala
> K7AWB
> DN17es
> Nine Mile Falls, WA
> 491 ARRL approved 6-meter grids confirmed
>
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