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Re: [TowerTalk] More from the M2 antennas quality control file

To: towertalk@contesting.com
Subject: Re: [TowerTalk] More from the M2 antennas quality control file
From: Patrick Greenlee <patrick_g@windstream.net>
Date: Mon, 13 Apr 2015 09:06:57 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Blind obedience to the instructions is no guarantee of success. I once snapped off several 1/4 inch stainless steel bolts with a torque wrench set to the specs in the printed instructions. A mech eng friend just laughed at me as it was obvious to him the instructions were wrong and twisting off the bolts was to be expected. I exchanged the kit with no problems and was told I was probably the only customer who followed the instructions.

To quote my favorite cowboy philosopher, Will Rogers, "We are all ignorant, just about different things."

Patrick    NJ5G

On 4/13/2015 8:53 AM, Chuck Dietz wrote:
I have a number of M2 antennas and I have only had one problem.  I called
them and they corrected it immediately by shipping the correct part.  I
have difficulty believing they won't correct a mistake they made.  I did
call them about mistakes in parts supplied with one of my 9 element 6 meter
beams, but it turned out I was misreading the directions and all the parts
were correct.

Chuck W5PR

On Mon, Apr 13, 2015 at 8:26 AM, Jim Lux <jimlux@earthlink.net> wrote:

On 4/13/15 5:37 AM, Patrick Greenlee wrote:

I'm not a Yagi guru or an EZNEC modeler. Can someone tell me what 1/16
of an inch in element length means in performance parameters in the
example below?  I have done mostly wire antennas and 1/16 or 1/8 didn't
seem to make much difference.


this is a 432 MHz antenna with a lot of elements where the elements are
about a foot long overall.
1/16" if it's on both sides, is shortening the element by about 1%

The element lengths are critical to getting low side/back lobe
performance, although it doesn't change forward gain very much.


As you note, on something like a dipole, a change of a few percent doesn't
change the performance all that much.

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