Hello, I borrowed a RigExpert analyzer and was able to take measurements that folks were asking for without AM station overload. I also built the K9YC 160m choke (18 turns of RG58 on a type 31 2.4" toroid). That choke is at the feed point of the vertical. The analyzer was connected directly after the choke.
I have a collection of data and typed it into Excel but I can summarize here. The values are Freq, SWR, R, X, Z 1810 2.1 1820 1.9 29.1 -14.3 32.4 1840 1.8 31.0 -5.7 31.5 1850 1.7 32.0 -1.3 32.1 1860 1.5 33.0 3.6 33.2 1880 1.6 35.3 13.0 37.6 1900 1.8 38.0 22.9 44.4 1920 2.1 1940 2.5 1960 3.0 1990 3.9 I still only have the 30 x 42' radials attached but can add about 5 x 100' more radials (in a non uniform layout) if that might help. Fair, bad, really bad, horrible, hopeless? Any advice is appreciated. 73, Todd - NR7RR _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
