Antennas

160 meters, transmit

Insulated base on Tower 1 -- 160-meter driven element.
Insulated base on Tower 1 — 160-meter driven element.

K3LR-inspired parasitic vertical array. Rohn 25 driven element, sits on insulators and series-fed through L network matching. Sloping T-shaped wire parasitic elements supported by rope catenaries, each spaced 66 feet from tower, are used as 3-element vertical yagi to give about 5 db gain and 25 db f/b in four selectable directions: NE, NW, SE, SW. Relays at base of each element ground parasitic wire for director, add coil to ground for reflector (resonates element just below 1800 kHz), or floats for omni pattern. 120 slightly buried quarter-wave radials under each element. Three elements active at one time; other two are left floating (above ground) and thus electrically invisible to the active elements. Additional wide-spaced second director element toward NE (Europe) adds about 1 db gain in that direction.

WW2Y-inspired broadside/endfire array. 325 feet broadside, 148 feet endfire spacing. Broadside pattern oriented northeast/southwest, switchable with about 8 db gain over a single element. One element is shared with the parasitic array (relay-switched between the two arrays) and other three are other T-shaped wires hung from loblolly pine trees and towers. About 73 feet vertical with 58 feet in the top-hat – resonant around 1930 kHz. Small coil at base to resonate around 1830 kHz.

160/80/40 meter receive Beverages

Beverages all about 10 feet high unless noted otherwise.

Prodelin 7/8 inch hardline enters homebrew switching box outside hamshack.
Prodelin 7/8 inch hardline enters homebrew switching box outside hamshack.

14 degrees heading: Single-wire 500-foot Beverage for northern Europe and central Asia.

37 degrees: Broadside phased pair of 950-foot Beverages, spaced 200 feet, for Europe.

45 degrees: Stagger-phased pair of 750-foot Beverages, spaced 25 feet apart and staggered 132 feet for Europe.

45 degrees: Stagger-phased pair of 525-foot Beverages, spaced 30 feet apart and staggered 132 feet for Europe.

The above three Beverages of different lengths toward Europe often produce three distinct layers of signals arriving at different wave angles. During contest pileups, switching between them often produces three different signals that can be copied — a different one on each antenna.

75 degrees: Broadside-phased pair of 500-foot Beverages, spaced 400 feet.

105 degrees: Broadside-phased pair of 600-foot Beverages, spaced 400 feet.

162 degrees: Single 1000-foot Beverage, 3 feet high. Zig-zags along what surveyors called a “meandering ditch” along property line.

180 degrees: Single-wire 500-foot Beverage.

210 degrees: Single-wire 600-foot Beverage, responsible for most skewed-path contacts into Southeast Asia (XU, HS, XZ as well as DU).

245 degrees: Single-wire 550-foot Beverage for ZL and south Pacific.

Homebrew relay box under construction, built in military test equipment surplus box.
Homebrew relay box under construction, built in military test equipment surplus box.

280 degrees: Single-wire 750-foot Beverage for VK and Pacific.

320 degrees: Broadside phased pair of 935-foot Beverages, spaced 175 feet, for JA/KL7/Northern Pacific.

320 degrees: Single-wire 500-foot Beverage for JA/KL7/Northern Pacific.

342 degrees: Stagger-phased pair of 880-foot Beverages spaced 3 feet, staggered 132 feet, for DU/BA/BV/JT.

342 degrees: Stagger-phased pair of 450-foot Beverages spaced 3 feet, staggered 132 feet, for DU/BA/BV/JT.

160 meter short receive verticals (W8JI-style)

Each element about 22-feet high with four 22-foot sloping top-hat wires.

2-element: Endfire spaced 70 feet, producing NE/SW cardiod pattern and other directions by use of separate feedlines to DX Engineering NCC-1 phasing box. Performance similar to single-wire 500-foot Beverage.

4-element: Broadside spaced 317 feet and endfire 70 feet. Broadside orientation favors NE/SW, variable with use of separate feedlines from forward pair and rearward pair going to NCC-1 phasing box. Performance equals or exceeds results with phased Beverages. Also useful directivity on 80 meters despite broad spacing on that band.

80 meters

The “forgotten band” at AA1K.  Single inverted Vee with apex at 95 feet. Under development: 8-circle transmit array that will be nested inside the 160-meter bs/ef TX array and share its massive radial field.

40 meters

Pair of stacked Hy-Gain Discoverer 7-3 (3-elements on 32-foot boom; linear-loaded elements) yagi antennas on Rohn 55 tower. Top rotates with T2X Tailtwister rotor; bottom fixed on Europe.

20 meters

Three stacked Hy-Gain 204BA yagis (4 elements on 26-foot boom) on Rohn 45 tower. Top rotates with T2X Tailtwister rotor; bottom two are fixed on Europe.

15 meters

Two stacked Wilson 415M yagis (4 elements on 17-foot boom) on Rohn 25 tower.  Top rotates with T2X Tailtwister rotor; bottom fixed on Europe.

10 meters

Single modified Hy-Gain 105BA (W3XU design) at 100 feet; single modified Hy-Gain 105BA (ARRL Antenna Book optimized design) at 48 feet on separate tower. Antennas are 5 elements on 26-foot boom.

6 meters

Single 5-element yagi, 24-foot boom.