[TowerTalk] M2 20M5 Yagi

[Jorge Diez - CX6VM]

Hello,

Today I went to M2inc website to download the 20M5 manual to see the right
dimensions of this antenna for FULL BAND, but there´s no change in the
manual!
http://www.m2inc.com/pdf_manuals/20M5.pdf

Really not understand what happens.

Waiting for M2inc answer about that.

73,
Jorge
CX6VM/CW5W

-----Mensaje original-----
De: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] En nombre de Cqtestk4xs at aol.com
Enviado el: Jueves, 16 de Febrero de 2012 10:24 p.m.
Para: TOWERTALK at contesting.com
Asunto: [TowerTalk] M2 20M5 Yagi

Interesting story about this beam.
 
I posted a few weeks ago about the M2 20 meter Yagi and was  looking for
anyone with experience with the beam.
 
After hauling the beam up and down the side of a test tower I felt something
wasn't right with the antenna.  Usually a 20 meter antenna up  around 25
feet or so will have its SWR dip lower in frequency than when it is  mounted
at its final height.  This one dipped higher in the band, around  14250.  I
finally called M2 and to my surprise Mike told me that for almost  10 years
the dimensions in the instruction manual have been wrong...only for the full
band setting.  Apparently, no one had ever had this problem or had  ever
notified them about it.
 
For those of you who have this beam and want to use the "full band"  
setting, add four inches to the driven element on both sides.  I did it and
the SWR is where it should be at a low height.  The dimension change
instruction is from Mike.  You may not have enough length on that 1/2 inch
tubing to do it.
 
Mike was quick to get back to me and was kind enough to send the  new 1/2
inch tips second day air..in time for the big tower/antenna party next
week. 
 Hats off to M2 for great service.
 
Bill K4XS/KH7XS
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