30 meter antenna
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Antennas : 30M- SAFARI 40-30m vertical Antenna
- Roach pole vertical antenna for 40 and 30 meters band featuring good performance on short skips contacts compared to wire dipole
[ Hits: 310 | Votes: 0 | Rating: 0 ]
- 30m Half -Size Rotary Dipole
- A rotary dipole antenna for 30 meters band. Each arm is about 12.5 ft and is constructed from telescoping fibreglass flag/fishing poles and short lengths of aluminium tubing. Two short lengths of glass-fibre rod were used to insulate the arms from the supporting hardware.
[ Hits: 198 | Votes: 0 | Rating: 0 ]
- 40 meters band beverage antenna
- The author describes his experience building and using a Beverage antenna for the 40-meter band. Despite encountering some challenges, the antenna offered some improvements in receiving stations compared to a 3-element inverted Vee antenna. The Beverage antenna showed a significant daytime signal-to-noise ratio improvement and received signals better than the Vee antenna. However, the front-to-back ratio was not ideal, and the transmit power seemed to affect the Beverage antenna. Overall, the author concludes that the Beverage antenna might be more suitable for locations with higher noise levels. The total cost of the antenna was around 30 Euros.
[ Hits: 34 | Votes: 0 | Rating: 0 ]
- Short vertical for 6 meters
- A 30 cm antenna for the six meters band in japanese
[ Hits: 186 | Votes: 1 | Rating: 1 ]
- 160m Inverted Delta Loop
- This 160 meter Delta Loop antenna is made of Hard drawn copper wire AWG 10, the two upper side are 148.5 foot each base wire is 240.9 foot, the feed point at 30.69 foot to one corner, feed with 450 Homs balanced line to an antenna tuner on the ground, then with 50 homs coax to the shack.
[ Hits: 114 | Votes: 0 | Rating: 0 ]
- Multiband Dipole for 40 30 17 m
- A portable home made wire dipole antenna that works on 40 30 and 17 meters band.
[ Hits: 312 | Votes: 0 | Rating: 0 ]
- Portable magnetic loop antenna
- A portable loop antenna, made with a 3 meter loop resonates with the chosen capacitor from just below 7MHz to about 28.300MHz which makes it usable on the bands from 40m to 10m.
[ Hits: 167 | Votes: 2 | Rating: 9 ]
- Multi-Band 4 Foot Magnetic Loop with Gamma Match
- This antenna works on 17, 20, and 30 meters, with the best bandwidth on 20 meters. The bandwidth on 17 and 30 is quite small but usable. There is a 20 KHz bandwidth on 20 meters.
[ Hits: 139 | Votes: 2 | Rating: 10 ]
- K1FM Mini Magnetic Loop
- Original HF magnetic loop antenna designed by the author to work in conjunction with QRP transceivers like the FT-817 in portable operations. In this configuration the loop can operate from 30 to 10 meters. Using a two spires radiator of the same diameter it also covers 40 meters.
[ Hits: 118 | Votes: 1 | Rating: 8 ]
- 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: 238 | Votes: 1 | Rating: 7 ]
- A simple Attic Antenna for HF bands
- This simple antenna was installed on the attic. Antenna was matched with help an Automatic ATU in 40, 30, 20, 17, 15, 12 and 10 meter amateur Bands. The Antenna worked satisfactory on the above mentioned bands.
[ Hits: 317 | Votes: 7 | Rating: 6 ]
- 20-30m Vertical Antenna
- Homebrew project for a vertical antenna with a coaxial-cable trap, that works on 20 and 30 meters band.
[ Hits: 73 | Votes: 0 | Rating: 0 ]
- W6LVP Loop Antennas
- Magnetic loop receive antennas manufacturer. W6LVP loops cover 2200 through 10 meters (135 kHz through 30 MHz) with no tuning or adjustment.
[ Hits: 145 | Votes: 1 | Rating: 4 ]
- 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: 38 | Votes: 1 | Rating: 10 ]
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