CM 160M LONGWIRE WITH 9:1 UNUN
CM Purpose: Demonstrate high-impedance random wire matching
CM Antenna: 200-foot non-resonant longwire @ 35 feet height
CM Unun: FT-240-43, 4:12 turns (9:1 impedance transformation)
CM Counterpoise: 30-foot ground wire (return path)
CM Expected: 450Ω→50Ω transformation, high takeoff angle for NVIS
CE
CM Longwire antenna (200 feet at 35 feet height)
GW 1 30 0.0 0.0 35.0 200.0 0.0 35.0 0.00641
CM Counterpoise (30 feet ground return, minimal height)
GW 2 10 0.0 0.0 2.0 30.0 0.0 2.0 0.00641
GE 0
EK
CM Frequency sweep: 1.8 MHz (160M)
FR 0 1 0 0 1.8 1.0
CM Voltage source at feedpoint
EX 0 1 1 0 1.0 0.0
CM Radiation pattern (high takeoff angle expected)
RP 1 91 91 1111 -90.0 0.0 1.0 1.0
EN