Bill, I'm probably the least savant of those on the reflector. Really... But I have an inverted-L which is held up under the tallest tree I can find and I have 45-50 130' radials on the ground and I'm feeding it directly with a 50 ohm coax. The SWR is at best 1.83 but it works fine on 10M, 12m, 15M as well as 160. The antenna is I believe 129.6" long and if you're looking for lower SWR, you could put a vac variable at the base, in series which will allow you to tailor your options. I used to do that but decided I really didn't need an ideal SWR and removed the vac variable because it worked fine as is.
73, Gary KA1J > > Good afternoon all, > I just finished installing a new Inverted L. The previous one was > removed because > a tree fell across a set of guys on my tower, which had to be taken > down. The new > Inverted L is strung up amongst a lot of tall (80 ft +) pine trees. > The vert. section is > abt 55 ft & the rest is nearly flat horizontal. Total length is 130 > ft/6 in. I am using a > 4 wire c-poise abt 9 ft high of which none are directly under the > horiz. section. > Each wire is abt 135 ft long. The min. SWR is abt 2.9:1 at 1833 khz. > The SWR > curve is broad which looks odd to me. I am feeding it direct with a > random length of > 50 ohm coax. For these tests, I am using a TS-440S, which reduces > power at this > value of SWR (the internal tuner does not operate on 160). Normally, > I would run > vintage xmtrs, which load up ok. I will try it tonight to see if it > gets out of the yard. > > Any suggestions how I can get the SWR down below 2:1 so the TS-440S > will work at > full power? I apologize if this subject has been discussed before. > If so, please point > me towards that info. > > Many thanks for any comments....73 de Bil l K4JYS > > _________________ > Topband Reflector _________________ Topband Reflector
