30 meter band antennas
4 links
- Shortened 80m Antenna
- An antenna for 80 meters band for those who does not have enough space to setup a halwave wire dipole that is aprox 130ft or 40 meters. The antenna is an open-wire-fed shortened dipole
[ Hits: 419 | Votes: 1 | Rating: 1 ]
- Moxon Antenna for 2 meters
- A moxon antenna for 2 meters band featuring 6 dBi and a F/B of 30 dBi
[ Hits: 705 | Votes: 3 | Rating: 8.67 ]
- Short Antenna for 40-30-20 Meters Band
- This page describes an entirely simple, One-Knob matchbox that will match this antenna efficiently on 40, 30 and 20m, using a simple circuit that can be switched between series-resonant and parallel-resonant with just one banana jumper
[ Hits: 235 | Votes: 1 | Rating: 7 ]
- Propagation on 630 Meters and 2200 Meters
- This is a theoretical look at propagation on 630-Meters and 2200-Meters using ray tracing software. It expands on the brief discussion in the ARRL Handbooks.
The Earth's magnetic field affects 630-Meter and 2200-Meter band propagation. Lower ionization reduces absorption, aiding low-frequency propagation. Differences exist between bands, limited daytime sky-wave propagation. Sunrise/sunset show promise, yet mechanisms are unclear. Ducting possible at night in specific conditions. Negative ions enhance propagation. Inefficient antennas and high man-made noise are anticipated. Groundwave propagation is significant on 2200-Meters.
[ Hits: 30 | Votes: 1 | Rating: 10 ]
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