The Macon OCF-3K75 is an off-center fed dipole that has been optimized for 75-meter SSB operation. A standard off-center fed dipole will have its resonant freq at about 3.5 MHz. The OFC-3K75 uses a coaxial capacitor on the long side of the antenna wire, to raise the resonant frequency to about 3.8 Mhz which is about the midpoint of the SSB portion of the band. All the other bands (40/20/17/12/10) are not affected. They will be resonant at the same frequency as the standard off-center fed dipole. This antenna is the same as our OCF-3K80 except for the 75-meter resonant frequency.
Specifications:
Operating bands 10, 12, 17, 20, 40 & 75 meters without a tuner .
Bandwidth 10m – 2000kHz, 20m – 500kHz, 40m – 400kHz, 75m 200kHz typical, (VSWR < 2.0:1)
Max Operating Power
3000 Watt PEP SSB with a 25 % duty cycle
2000 Watt PEP SSB with a 50% duty cycle
1000 Watt PEP SSB continuous duty – 1000 Watt CW – 500 Watt FT 8 and RTTY
Typical impedance 40 ohm – 60 ohm (depending on installation height and configuration)
VSWR 1.5:1 (typical)
Total length Dipole 133 feet.
