Help with installing an Antenna, or just choosing the right antenna to go with your radio, or your mobile.
Moderator: JR Moderator
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- Posts: 706
- Joined: Sunday, 14 June 2009, 18:46 PM
- Radio: Washington/TRAM/K3
- Antenna: Imax, G5RV, Invtd L
My Imax 2000 has been up there for so long, I can't remember the year when it went up, maybe 2006. Within the last two weeks, SWR has changed from 1.1 on 27.255 to 1.1 on 28.005 when checked with the analyzer. Something went out of tune somewhere. I am guessing there is a tuning ring adjustment. The LMR 400 coax has been replaced six years ago and it works very well on 10 meters with the exception of a 1.5 swr now on 27.255 and a tuner can compensate and still making great contacts on 11 meters. I am wondering if it's really worth the effort and instead focus on building other home brew antennas on other bands. Any thoughts?
- Posts: 7472
- Joined: Saturday, 12 June 2010, 19:05 PM
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- Radio: Uniden Washington
- Antenna: Avanti Sigma II
- Name: Greg
- Location: Baltimore, MD
I think it could be possibly 2 things, 1, the coax is old and has gotten contaminated over the years or 2, with age the lower section of the antenna has started corroding inside at the impedance matching coil. It actually could be both of these.
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