[TowerTalk] M2 20M5 SWR measurements

[K1TTT]

Is the jumper you added 50 ohm coax?

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net


-----Original Message-----
From: Jorge Diez - CX6VM [mailto:cx6vm.jorge at gmail.com] 
Sent: Saturday, December 31, 2011 00:07
To: Towertalk Reflector
Subject: [TowerTalk] M2 20M5 SWR measurements

Hello,

I have a 20M5 and 15M6 antennas from M2
After 3 years using this antennas, I noticed a change in the SWR of the 20M5
when I added a High power BPF, for what I need to add some coaxial jumpers.

Today I did some tests. I removed the filters to have my original setup: K3,
Amplifier, SWR meter (Powermaster), antenna switch (Six Pack) and antenna.

The measurements in the Powermaster and in the K3 meters are a little
different, so I take notes of both

I add a 8.35 ft long jumper to the antenna, and this is the results:

FREQ		ORIGINAL SWR	SWR WITH ADITIONAL 8.35 FT (2.55 MTS)
            PWMASTER  K3        PWMASTER  K3
14025		1.82      2.0       1.39      1.6
14300       1.37      1.3       1.48      2.3      

So what do you think is the problem?  

With the additional 8.35ft jumper, the SWR is very good in the PowerMaster,
but not good in the K3 meter

Really I don´t like to see that measurements diference, seems something bad,
and want to solve this problem.

Thanks in advance!

Happy New Year 2012!!!

73,
Jorge
CX6VM/CW5W 

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