Vine Antennas UK HAM Radio Amateur Radio Accessories Antennas ATU's https://www.vine-comms.co.uk/product/vine-antennas-as-hf-ocf-40-hp/ |
Vine Antennas AS-HF-OCF-40-HP | High Power Off Centre Fed Dipole | LAMCO BarnsleyPrice: £149.95 SKU: Vine Antennas AS-HF-OCF-40-HP In stock: 2 Product Categories: VINE ANTENNAS AERIALS Product Tags: 40, as, cente, dipole, fed, HF, hp, ocf, off Product Page: https://www.vine-comms.co.uk/product/vine-antennas-as-hf-ocf-40-hp/
Product Summary
Product DescriptionVine Antennas AS-HF-OCF-40-HP | High Power Off Centre Fed Dipole
Vine Antennas AS-HF-OCF-40-HP What's an Off-Centre Fed Dipole? 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. Why Off-Centre Feed a Dipole? 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
Specification Bands: 80M, 40M, 20M, 15M, 10M Power: 1Kw pep Max OCF 40 Overall Length 63' 6" Overall Length 19.3548m
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