Hi Gabriel, These comments will be of little help as far as the technical info on the subject antenna and is a far cry from an excellently constructed antenna but it is very practical....in my opinion of course.
However, I do use an Inv. L with a four wire counterpoise...or elevated radials if you prefer. Mine is approximately 50ft vertical and rest horiz....total, a quarter wave. The horizontal part is about 50 feet high and fairly flat. The antenna is completely covered over with tall pine trees. The CP wires go off from the base/feed point 10ft off the ground and at approximately 90 degrees apart. Each CP wire is about ten feet high and some are supported on tree trunks, others have some PVC posts for support and seems the CP wire lengths are a bit shorter than a 1/4 wave lgth, but my memory may not be too good on this part. I feed it with RG8X...I only run 100 watts(CW) on 160....no need for big coax in my case. I just used a door-knob cap between the vert and CP at the base....can't remember the value but think I just experimented until I got the SWR good....also think I did some trimming on the CP wires. I have had very good success with this antenna. With 100 watts I have been able to work several DXped. stns in the Pacific, JA. This season I have worked nearly 80 EU, Carib and Pac. stations. I had a lot of fun in the recent ARRL CW test. No, I don't get every station I call, but enough to keep me happy. The purist, with all their instruments and computer programs would laugh at my version, but it seems to be an easy antenna to get working and, at least in my case, a decent antenna. (I also use it for receiving...works well there too). Try it....easy to put up and if it don't work, go on to something else....hi. GL & 73 de Bill K4JYS/NC ----- Original Message ----- From: "topband" <topband@contesting.com> To: "topband" <topband@contesting.com> Sent: Thursday, March 5, 2020 1:02:07 PM Subject: Topband: Inverted L with elevated radials for topband I have some doubts about installing and inverted L with elevated radials for 160m. I have been searching in Google and find some contradictory information, so I would appreciate very much if you can help me with your own experience. The antenna would be supported by a 16 m (52.5 ft) high fiberglass pole placed on top of a 3m (10 ft) high small tower with the horizontal part of the L slopping down to a 5 m (16 ft) high mast about 23 m (75 ft) away. Two to four tuned elevated radials can be placed, although they will have to be bent due to space restrictions. Now the doubts: What impedance can I expect at the feed point with this configuration? How to match it in order to feed it with a 50 ohm cable? Some pages say that no match is required, only a choke. Other pages say a hairpin is necessary as the impedance can be too low. So other say that a tuner at the base is required? I am confused L What performance for DX can be achieved by this antenna? Is it really good or do you have some better suggestion for a really small lot where no ground radials are possible? Would it be worth to use a higher fiberglass pole, let's say 4 m (13 ft) higher, in order to lengthen the vertical section of the L? Would the difference be noticeable? Anyone has real experience setting up this antenna with elevated radials? Most information I can find on Internet is related to ground mounted antennas. Thanks in advance! 73. Gabriel - EA6VQ _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector