x 7 antenna

442 links - and 1 categories

The Cobra Antenna - A folded wire antenna for 160 meters as appeared on 73 amateur radio magazine june 1997
[ Hits: 2139 | Votes: 4 | Rating: 5.75 ]

70 MHz Delta Loop - A simple delta loop antenna for the four metre amateur radio band
[ Hits: 537 | Votes: 6 | Rating: 7.17 ]

6m Jpole antenna - A J-pole antenna plan for 50 MHz based on the DK7ZB design
[ Hits: 481 | Votes: 0 | Rating: 0 ]

Portable Vertical Antenna for 40 and 75 - Portable Vertical Antenna for 75m and 40m featuring Low radiation angle for DX, easy to install and to match 50 ohms
[ Hits: 3933 | Votes: 7 | Rating: 7.14 ]

15m Four Square antenna - A 21 MHz Four Square Beam Antenna This popular antenna for the lower bands, can also work well on 15 meters, QST Article
[ Hits: 1358 | Votes: 0 | Rating: 0 ]

ZS6BKW vs G5RV - An exaustive comparison of the two antenna models including antenna Patterns/SWR at 40 ft center height, 27 ft end height ~148 Degree Included Angle
[ Hits: 1399 | Votes: 4 | Rating: 7 ]

Mixed Mode Helical Antenna - An experimental omni-directional antenna for 70cm which has both horizontal and vertical gain
[ Hits: 1006 | Votes: 3 | Rating: 8 ]

A Dual Band VHF/UHF J Pole - This antenna provides continuous coverage of the 2 metre (144-148MHz) and 70cm (430-450MHz) bands and is an excellent choice for base station use.
[ Hits: 2284 | Votes: 17 | Rating: 6.83 ]
The Copper Cactus J-Pole - Original article published on February 1992 on 73 Amateur Radio Today about the 2m and 70 cm copper cactus J-pole antenna
[ Hits: 1718 | Votes: 2 | Rating: 10 ]

HF Resonant Loop Antenna - The antenna was built to be used for shortwave listening with a Tecsun PL-660 radio receiver. Later it was used with Yaesu VX-6 handheld transceiver and with Yaesu FT-817ND for shortwave listening.
[ Hits: 1037 | Votes: 3 | Rating: 9.67 ]

A 20 meter Moxon Antenna - Moxons work great, and they take up less space than full size two element Yagis
[ Hits: 2371 | Votes: 3 | Rating: 6.67 ]

Hula Loop MW DX Antenna - An excellently presented article on the design and construction of a medium wave DX Antenna
[ Hits: 1240 | Votes: 1 | Rating: 1 ]

Why does ice on a wire dipole affect the SWR? - Effects of ice an snow in a wire dipole antennas
[ Hits: 337 | Votes: 1 | Rating: 1 ]
Designing Vertical Aerials - If you want to design vertical antennas you can find all theory and formulas used to model a vertical aerial calculating capacitance, reactance, building the inductor and calculating resistances. Includes an excel spreadsheet to calculate efficiency.
[ Hits: 576 | Votes: 0 | Rating: 0 ]

VHF 10 element Yagi - A ten element ultra-lightweight yagi beam antenna for 144 MHz based on YU7EF design concept
[ Hits: 831 | Votes: 7 | Rating: 6.29 ]
W8JK Beam Antenna - The W8JK is a famous and effective DX antenna, first built by John Kraus, W8JK, in 1937. A Beam antenna with two parallel dipoles driven with opposite phase, with a close spacing of an eighth of a wavelength.
[ Hits: 5151 | Votes: 21 | Rating: 7.19 ]

Some Useful ZS6BKW Modifications - The ZS6BKW antenna evolved from an optimization of the G5RV antenna. The SWR on 80m is too high and the 40 ft ladder line matching section is a little too long on 17m and a little too short on 10m
[ Hits: 1025 | Votes: 3 | Rating: 4 ]

Mod for Acom 1000 amplifier - The problem originates by improper TXOUT-to-RF timing (RF transmission exists still after a TX-EN prohibition), combined by too long decay of their CW pulses.
[ Hits: 511 | Votes: 0 | Rating: 0 ]

TransWorld TW2010L Review - A brief review of the TW2010L Backpacker Antenna. This is a portable vertical antenna covering 10,12,15,17 and 20m
[ Hits: 424 | Votes: 2 | Rating: 9.5 ]

Arduino based antenna rotator controller - Inspired by Milan OK7GU, the goal is to build an universal antenna controller - for different types of rotor, different motor, encoder
[ Hits: 1200 | Votes: 3 | Rating: 6 ]