Short Ham Antennas For HF
You may have heard that short ham antennas are not as efficient, nor as effective as a "full length" half-wave dipole, regardless of the configuration chosen.
Good news! I describe in this article the only exception I know of ... that actually works!
I believe the details of this technique were first published a while back by John Stanford, NN0F.
|10 meters (28.5 MHz)
12 meters (24.9 MHz)
15 meters (21.1 MHz)
17 meters (18.1 MHz)
20 meters (14.1 MHz)
30 meters (10.1 MHz)
40 meters (7.1 MHz)
80 meters (3.6 MHz)
160 meters (1.85 MHz)
|3.5 m. (11.5 ft.)
4.0 m. (13.2 ft.)
4.73 m. (15.5 ft.)
5.51 m. (18.1 ft.)
7.08 m. (23.2 ft.)
9.89 m. (32.44 ft.)
14.06 m. (46.14 ft.)
27.74 m. (91.0 ft.)
53.97 m. (177.08 ft.)
I use commonly available 390 Ohm "ladder line" with #14 stranded, copper-clad conductors. It is sturdy and lasts for years.
For the central "attachment" I use two LadderLoc center insulators, head-to-head (available at Radio Works).
I recommend 3/16 in. Mil Spec Dacron® rope to tie the ends to tall supports such as trees.
Linear-loaded short ham antennas do not have to be limited to horizontal installations!
You can save even more space by installing them as "slopers", inverted "V"s and inverted "U"s.
I describe these configurations in detail on space-saving ham radio HF antennas.
Have fun! See you on HF.
73 de VE2DPE
Author: Claude Jollet - VE2DPE
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