Unun 1:9 Wire Lengths

August 30, 2023

Two lengths pop out with low SWR for all bands: 38m and 16.2m.

Wire Length	1.8 MHz	3.7 MHz	5.3 MHz	7.1 MHz	10.1 MHz	14.2 MHz	18.1 MHz	21.2 MHz	24.9 MHz	28.5 MHz	50.1 MHz
53.3m	1.2	1.6	1.1	1.1	1.1	1.8	1.3	1.6	1.7	1.2	1.5
51.5m	1.4	1.2	1.2	1.2	1.2	2.1	1.4	1.4	1.5	1.2	1.1
49.4m	1.4	1.5	1.7	1.3	1.6	1.8	1.9	1.1	1.5	1.7	1.5
44.5m	1.7	1.5	1.4	1.4	2.4	1.5	1.3	1.2	1.4	1.5	1.5
41m	2.0	1.4	1.3	1.8	1.6	2.0	2.0	1.7	1.5	1.6	1.3
38m	1.3	1.3	1.2	1.3	1.7	1.6	1.8	1.6	1.4	1.1	1.4
30m	1.8	1.7	1.4	1.7	2.3	1.9	1.4	1.2	1.7	1.2	1.2
27m	1.8	2.2	1.7	2.3	1.9	1.3	2.0	1.8	1.4	1.5	1.5
22m	2.0	2.0	1.4	1.2	1.2	1.9	1.9	1.5	1.1	1.5	1.1
18m	1.6	1.6	1.3	1.5	2.0	1.5	2.0	1.1	1.7	1.2	1.5
16.2	1.6	1.4	1.2	1.1	1.5	1.1	1.9	1.2	1.1	1.7	1.1
15m	1.5	1.3	1.4	2.4	2.4	1.3	1.6	1.6	1.4	1.7	1.5
13.4m	3.0	1.2	1.5	2.1	2.1	1.7	1.3	1.7	1.6	1.1	1.2
11m	2.2	1.2	1.3	1.3	1.3	2.0	1.6	1.2	1.7	1.6	1.5
9m	3.0	1.3	1.3	1.2	1.2	2.1	2.0	1.3	1.2	1.6	1.3
7.5m	3.2	1.7	1.6	1.6	1.6	1.4	2.1	1.8	1.3	1.2	1.4

Typical SWR relative to wire lengths. SWR will vary based on topography, wire orientation and use of ground or counterpoise. For best results, use the longest wire