Im hoping someone can point out the obvious mistake i must be making here!
Im putting an inverted V linked dipole together for my Scotland trip, now, i can get 10m, 12m and 17m to work ok, but for some reason cannot get 20m lower than 3:1 anywhere! Im using my MFJ-259 to test, and even sweeping well above and below the band in cant get it any lower, ive tried more wire, less wire, higher and lower apex, nothing seems to work. Now, i dont have an ATU to take with me, so must get below 2:1 where i intend to operate.
As a rundown on the design, its apex is at 6m, on a fibreglass fishing pole, and the tie off points for the dipole ends are at 8m radius. At 20m this brings the ends of the dipole to about 1.5m above the ground, which i would have thought to be ok. The dipole is made using loudspeaker wire and automotive bullet crimps.
Im sure im doing something obvious wrong, but i cant work it out.
Would someone else who uses one of these on the summits let me know what dimensions they use? Do i need to use a greater radius for the ends of the dipole? I cant easily test that, as i dont have the garden space!
I havent even tried to make it work on 40m yet, which is the main band i intend to use!
All help much appreicated!