In stock
An Off-Centre Fed Dipole for
40M, 20M, 15M & 10M (no tuner)
30M, 17M, 12M (with tuner)
A traditional Dipole is a half-wavelength radiator, fed in the Centre with two equal length legs, the Off-Centre-Fed Dipole is a Dipole whose feedpoint is at a point removed from the centre of the antenna.
A traditional dipole is fed in the centre with 50-ohm coax, or more correctly through a 1:1 balun, whereas the off-centre fed dipole is fed through a 4:1 balun.
By moving the feedpoint of the dipole from the centre to off-centre, we create a multi-band antenna with multiple resonant points. We also change the feedpoint impedance and therefore need a carefully designed balun to provide a match to 50 ohms.
A centre fed dipole is only resonant at one single frequency, the off-centre fed dipole is resonant on multiple frequencies.
Your AS-HF-OCF-40 has been tested for resonance and is resonant on the 40M, 20M, 15M and 10M amateur bands and needs no ATU.
The antenna also offers a reasonable match on the 12M, 17M and 30M amateur bands but must be used with an ATU
By careful design of the balun and feedpoint of the antenna, your AS-HF-OCF-LITE has the following SWR from 0 – 30MHz:
Bands: 40M, 20M, 15M, 10M (without ATU)
30M, 17M, 12M (with ATU)
Power: 100W Max
OCF-Lite
Overall Length 63 9″
Overall Length 19.3548m