fr ground

59 links

160 Meter Ground Plane - The 160 meter ground plane is constructed from #10 stranded insulated wire available in most hardware stores. The feedpoints / tiepoints use PVC pipe T-sections Article by W1TR
[ Hits: 862 | Votes: 1 | Rating: 9 ]

Delta Loop for 40 and 20 meter Band by UR0GT - This wire antenna for 40 and 20 meter band feature a good SWR. Horizontal side of the antenna is placed at two meters above the ground. Impedance of the antenna are depending by the height of the base from the ground and conditions of the ground
[ Hits: 535 | Votes: 5 | Rating: 7.8 ]

80m Vertical Antenna with Folded CounterPoise - A very efficient 80 meter Counterpoise antenna designed to reduce ground losses from inadequate radial systems beneath inverted L antennas, a project by DM2GM and DM4IM based on the original K2AV antenna concept.
[ Hits: 1090 | Votes: 2 | Rating: 7 ]
80 Meter Ground Plane - The 80 meter ground plane is constructed from #10 stranded insulated wire available in most hardware stores. The feedpoint uses PVC a pipe T-section Article by W1TR
[ Hits: 1271 | Votes: 5 | Rating: 5.8 ]
Top Loaded Vertical Antenna for 80 Meters Band - Top Loaded Vertical Antenna 3,5 MHz 80m and a 14 MHz Trap for the 20m band. The weight of this portable vertical antenna is less than 1 kg, including the ground network. The weight of the telescopic fiberglass fishing rod is another 1kg. The rod expands from 1.5 meters to 8 meters.
[ Hits: 268 | Votes: 0 | Rating: 0 ]

Ground Plane Antenna Calculator - This calculator is designed to give the vertical length of a quarter-wave ground plane antenna, and the length of each of the four radials for the selected frequency you have entered
[ Hits: 912 | Votes: 61 | Rating: 5.34 ]

20m Half-Wave End Fed - A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.
[ Hits: 1845 | Votes: 7 | Rating: 8 ]

Notes on Designing LF-MF antennas - A free book on designign LF MF antennas. The six chapters in the body of the book are limited to basic information which, combined with a little modeling or simple calculations, can be applied directly using graphs for special problems like inductor design.
[ Hits: 267 | Votes: 2 | Rating: 9.5 ]

Radials on Vertical Antennas - Experimental Determination of Ground System Performance for HF Verticals
[ Hits: 1404 | Votes: 9 | Rating: 6.67 ]
Field Day Vertical Antenna by KN5L - This Field Day Vertical Antenna project is the result of many years of attending various field day sites and realizing that what was needed is a simple, easy to assemble vertical antenna. The design of this Field Day Antenna is not very novel and leverages ideas from Butternut verticals and ARRL publications. The one essential requirement was that the antenna can be raised by just one person. The design of this Field Day Antenna is an above ground mounted ground plane vertical.
[ Hits: 214 | Votes: 3 | Rating: 7 ]

The K2AV FCP Single Wire Folded CounterPoise - Efficient Low Band Counterpoise for Restricted Circumstances Loss Avoidance Opportunities and Techniques for the Low Bands The short and linear FCP was designed to reduce ground losses from inadequate radial systems beneath inverted L and other vertical antennas.
[ Hits: 283 | Votes: 0 | Rating: 0 ]

LCARS - The Lake Country Amateur Radio Service consists of interested amateur radio (Ham Radio) operators from the Virginia and North Carolina counties that surround Kerr Lake and Lake Gaston. Our members have a variety of interests and backgrounds, bringing rich and varied experiences to the club membership.
[ Hits: 294 | Votes: 4 | Rating: 8 ]

Tecom - Tecom industries product line encompasses a wide range of highly sensitive active and passive antennas for use in airborne and ground applications, providing complete coverage of the 20 MHz to 40 GHz frequency range.
[ Hits: 355 | Votes: 0 | Rating: 0 ]

High Altitude Ballooning, From The Ground Up (and back again) - High Altitude Ballooning makes for a challenging project that sometimes turns into an engrossing hobby. Whilst it is not rocket science it does encompass a wide range of fields (sometimes literally) and there is a lot to learn before you send your first flight up into the sky.
[ Hits: 136 | Votes: 1 | Rating: 10 ]

How Satellite Doppler Tracking Works - The Doppler Effect allows the distance between a satellite transmitting from space and a radio receiver on the ground to be measured by observing how the frequency received from the satellite transmitter changes as the satellite approaches, passes overhead, and moves away.
[ Hits: 424 | Votes: 3 | Rating: 4.67 ]

Build your own ADS-B Ground Station - You can now build and run your own ADS-B ground station that can be installed anywhere and receive real-time data directly from airplanes on your computer
[ Hits: 843 | Votes: 2 | Rating: 10 ]

SimJT - SimJT is a simulation program. It generates audio-frequency JT65 and CW signals in a background of gaussian white noise, with user-specified signal-to-noise ratio.
[ Hits: 2777 | Votes: 2 | Rating: 1.5 ]

Notes on Ground Systems - A collection of frequently asked questions on ground systems
[ Hits: 416 | Votes: 1 | Rating: 10 ]

FCC OET -- Radio Frequency Safety - FCC Policy on Human Exposure to Radiofrequency Electromagnetic Fields
[ Hits: 352 | Votes: 0 | Rating: 0 ]

Locating Power Line Noise - RF interference from power lines is caused by arcing as high voltage electricity bridges a gap to a lower ground potential on the power pole. Corroded or loose connections, cracked insulators almost all of the hardware on a power pole can be the source of arcing.
[ Hits: 427 | Votes: 0 | Rating: 0 ]