[Top] [All Lists]

Re: [TowerTalk] M2 20M5 Yagi

Subject: Re: [TowerTalk] M2 20M5 Yagi
From: "" <>
Date: Fri, 17 Feb 2012 05:30:56 -0800 (PST)
List-post: <">>
The SWR should not change much if you check it at 30-40 feet high. I would 
think the full band setting would be the most common so I doubt that you are 
the first one to have a problem. Is this an OWA antenna? OWA designs usually 
cover the whole band plus. 

John KK9A

Subject:  [TowerTalk] M2 20M5 Yagi 
Date:  Thu, 16 Feb 2012 19:23:59 -0500 (EST) 


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 
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  
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 time for the big tower/antenna party next  week. 
 Hats off to M2 for great service.



TowerTalk mailing list

<Prev in Thread] Current Thread [Next in Thread>