[TowerTalk] SteppIR SWR question

[K3WRY at aol.com]

Mike
I have had good luck by using a small tripod holding a 10 ft TV mast  on 
which I temporarily mount the beam and then make swr adjustments to the  
antenna.  So far several+  beams of HF single band or tribander as  well as VHF 
beams keep their SWR after being mounted on 50ft, 70ft and 135ft  towers.
 
Joe k3wry
 
 
In a message dated 4/29/2011 9:16:13 P.M. Eastern Daylight Time,  
john at kk9a.com writes:

I don't  think you can check and antenna SWR this way.  If you could pull 
it  
up 40' or tip it so that the beam is pointing toward the sky, you may get  
more usable data.

John KK9A


To: towertalk reflector  <towertalk at contesting.com>
Subject: [TowerTalk] SteppIR SWR  question
From: Mike <nf4l at nf4l.com>
Reply-to:  nf4l at nf4l.com
Date: Fri, 29 Apr 2011 17:01:02 -0400

My 4L SteppIR  with the 30/40 M trombone is on sawhorses in the front yard. 
 
It
was
down to replace the driven element motor. The climber and  crane are 
scheduled
to put
itback on the tower tomorrow  morning.

After I replaced the motor, I ran an SWR check from 7.005 to  29.5. The SWR 
ot
the
lower end was 7.2, lowering as the frequency  went up, til at 29.5 it was 
1.0.
Considering the proximity to ground, I  can accept that range.

Today ( 10 days later) I checked again, and the  SWR range had gone up to 
8.2 
to
2.2.
Nothing has changed, except we  had rain last night, so the ground is a tad
damper.

How concerned  should I be, and what would you check? I really don't want 
to 
get
it  in
the air and have a problem.

73, Mike NF4L  

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