I had been experiencing a somewhat erratic and intermittent SWR/Tuning problem. Sometimes the tuning cycle would never end, and the only way out was to turn the controller off. As I was soon to be moving house, I simply ignored it, and packed up the loop. It was when I came to install the loop at my new location that I discovered the problem - a mouse nest! A mouse had made a very comfortable nest for itself in the bottom mounting box of the loop. This box is hollow, and obviously there is sufficient room for a small animal to enter. I cleaned out the nest, and blew out any remnants with compressed air, and this seems to have solved the problem. It might pay to occasionally examine the mounting box for unwanted residents!
5 giorni fa
Anyone suffer from poor tune on 20m when the Midi loop gets wet? When I build this one I noticed that the Gamma match tubing had a badly seated cap, when I removed it to inspect a few drops of water came out of the tube. Am going to take the loop down today and inspect this again as its been quite wet recently but am interested to know if this is a known issue. This is a used loop and as far as I know it was stored indoors prior to my assembly and when I did the build, the loop was only outdoors for about 2 days before it went on the mast. Was rather surprised to see the water and trying to tun last night when raining, 20m was nothing below 2.1, today now its dry kinda back to normal at 1.6 ish. Real concerned that water is getting into the co-ax section and thats bound to be bad news. 73s Pete