GENERAL

This antenna is designed for 40, 80 and 160 meters to complement a tri-band beam normally taken on DXpeditions for 10, 15 and 20 meters, so six bands can be worked with only two antennas.

CONSTRUCTION:

The material used is high strength aluminum tubing, 6061-T6 alloy, in sizes ranging from 2 inches to 1 inch ( 5 to 2,5 cm) OD Guy lines are 3/32 inch t 2.4 mm) dacron double braided rope with a rating of 260 pounds (118 Kg) breaking strength. Wind survival rating is 100 MPH (160 KMH) assuming proper guy rope anchors.

CONFIGURATION:

The antenna is a vertical element 48 feet ( 15 meters ) high with traps for 40 and 80 meter operation, with a top loading guy wire connected BELOW the 80 meter trap to resonate the antenna on 80 meters and a top loading wire connected ABOVE the 80 meter trap for 160 meter operation. It is guyed four ways at three levels so the side guy ropes act as a hinge allowing it to be "walked up" by one person.

Original traps were coaxial as in oct.81 HAM RADIO, May '81 QST and Dec. ' 84 QST. These work fine at powers up to 800 watts or so, but run "hot" at " full legal power"!!

The latest design uses regular L/C traps with the "L" being #10 wire and the "C" made from lengths of R/G 213U (approx 30pf/ft.) The mechanical construction is a little complicated, but not difficultly (The coax cap. fits inside of the aluminum mast sections. A single approx 3' for 40 and parallel approx 4' sections for 80) The 40 meter trap uses 13 T on 11/2 CPVC.