Antennas & Towers Overview
Antenna system at AC0C is based on 4 towers:
- "20m Tower" - 20m, 15m and 6m beams plus 80m dipole. 114' Rohn 55G. Fiberglass rod guys.
- "40m Tower" - 40m, 30m, 17m and 10m beams. 126' Rohn 55G. Fiberglass rod guys.
- "160m Tower" - 160m vertical and 80m 4-square. 131' Rohn 25G. Fiberglass rod guys.
- "Test Tower" - 12m beam on a tower near the house. 30' Rohn 25G. Attached to 12' support.
The 4 towers are supplemented by some RX antennas and a 40m 4-square.
Relative locations of the towers is shown below in this annotated satelite view. The two main beam towers are on a nearly N-S line with the 160m vertical tower off to the NE. Tower location is constrained primarly by a seasonal creek that runs through the property - the creek and the associated trees conspire to make some of the site unusable without a lot of site prep. The neighboorhood is NE of the nearest city about 2 miles and most plots are several acres in size resulting in a reasonable noise profile. Fortunately in the NE direction there is only one houses for distance of several miles making the important NE direction the lowest noise level.
Antennas - 20/15/6m
20m rotating JK206 - 6 ele - 44' boom
6m rotating M2 - 7 ele - 30' boom
15m rotating JK155 - 5 ele - 36' boom
15m fixed on EU - homebrew 5-ele OWA from KLM parts
20m fixed on EU - homebrew 4-ele OWA from Hygain LJ parts
20m fixed on SA - homebrew 4-ele OWA from Hygain LJ parts
80m dipole - copperweld with Dacron rope support
15m fixed on SA - homebrew 4-ele OWA from Hygain LJ parts
Antennas - 40/30/17/10m
20m rotating JK402 - 2 ele cap loaded Moxon-style - 21' boom
10m rotating JK106 - 6 ele - 36' boom
30m/17m rotating - homebrew 3-ele 30m and 4-ele 17m on 30' boom from Telrex and new parts
10m fixed on EU - not yet mounted
10m fixed on SA - 3-ele - 12' boom - K5GO design/build - actual antenna from the FT5ZM dxpedition
also 40m 4-square with elevated radials located between the two HF towers
Antennas - 160/80m
160m full-size vertical - insulated base - 82 in-ground radials
80m 4-square - wire verticals suspended from Dacron ropes off the tower - 200 on-ground radials total
HiZ pro4-8 circle 104' array
18' CW-skimmer all band buffered vertical