long

348 links - and 5 categories

160m Short Vertical Loft Antenna - This is a very small vertical 160m antenna that fits in the loft of even my small house. It was built as a way of getting a signal out on 160m for local AM contacts, but the local noise level was far too high to allow it to be used at night for this purpose. However, on WSPR it did a pretty good job with WSPR spots from a very long way across Europe being received when running 2.5W out.
[ Hits: 208 | Votes: 1 | Rating: 7 ]

DL6WU Yagi Antennas for 1200 MHz - Dubus article about DL6WU long yagi antennas for 23 cm band Article is both in german and english. Yagi antennas are valid alternative to dishes for troposcatter operations. This article explains design and mechanical data for 1296 MHz Yagi Antennas
[ Hits: 320 | Votes: 1 | Rating: 10 ]
Yagi antenna for 23 cm - Homebrew 23 cm 12 element Yagi Antenna based on the DL6WU design. This articles include several pictures of the yagi antenna along with detailed element size and spacing.
[ Hits: 161 | Votes: 0 | Rating: 0 ]

Ham radio 40-meter dipole: your first antenna - How to home made a custom home made dipole antenna for the 40 meters band, just 66 feet long. Enjoy the band openings during the evening and play morse code or digital modes on this magic band.
[ Hits: 198 | Votes: 0 | Rating: 0 ]
40m loaded dipole - This is an short dipole for 7 MHz. Total length of this dipole is just 10 meters, 33 feet. Missing lenght is balanced by a coil made of 49 turns of a 40mm diameter pvc pipe. The use of a choke balun is recommended, as always, to adapt the unbalanced coax cable to the balanced antenna, and to prevent RF feed back along the coax shield.
[ Hits: 194 | Votes: 4 | Rating: 8.75 ]

G3JVL Vertical Antenna for 50 MHz - The G3JVL 6M ground plane vertical is a compact antenna that is ideal for portable operations. It packs away into a small bag only 1.3 metres long which is an ideal size for hand-baggage on aircraft.
[ Hits: 246 | Votes: 2 | Rating: 9.5 ]

6el LFA Yagi for 50MHz - This six element LFA Yagi for six meters has a 1.5 inch square boom with a 1.5 inch secondary boom beneath the first. This ensures the 7.3 metre long boom will not sag and will not require any guying. This antenna has 12.3 dBi Gain and just over 23dB F/B.
[ Hits: 117 | Votes: 2 | Rating: 4 ]

80m Inverted-L 12m Spiderpole - An Inverted-L with its long leg sloping to the ground. It will still work very good, even if the horizontal wire has to be sloped diagonally to the ground, as long as you have enough horizontal space to keep it at about a 45 degree angle or more from the pole.
[ Hits: 150 | Votes: 0 | Rating: 0 ]

Testing End Fed Long Wire Antenna - Testing a 27.2 metre end fed long wire antenna,used for SOTA activations placed as an inverted V. The author reports in this article an on the field practical result.
[ Hits: 168 | Votes: 0 | Rating: 0 ]

History of the Hexbeam Antennas - The original HEXBEAM was developed by Mike Traffic, N1HXA, in the early nineties. It is true that an M over W configured yagi antenna that resembled a butterfly was earlier tried successfully. But the advanced electrical design, the characteristic nesting concept and central terminal post that enable the multi band functionality along with the basic hardware design were all developed by Mike Traffie.
[ Hits: 130 | Votes: 2 | Rating: 7.5 ]

Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
[ Hits: 192 | Votes: 0 | Rating: 0 ]

Balcony Vertical HF Antenna - The simple balcony vertical HF antenna made with plastic fishing pole. Just along the pole I install copper wire in 7 meter length. Then was installed ATU. It was used home brew tuner. For each band was used one counterpoise in length 0.8 x lambda/4
[ Hits: 238 | Votes: 0 | Rating: 0 ]

5 Band Pipe Vertical Antenna - A simple, cheap and easy to build 26 feet long vertical antenna that works DX on 20 - 10 meters including WARC Bands, it is designed for portability for field days, camping, or permanent installation, cost, and to achieve at least 1/2 wavelength on the WARC bands.
[ Hits: 554 | Votes: 5 | Rating: 6.2 ]
40m center loaded vertical antenna - A 5 metre center loaded vertical for 40m combined with a 4 wire ground plane.
[ Hits: 297 | Votes: 0 | Rating: 0 ]

MOTA Mines On The Air - Like SOTA, Summits On The Air, Mines On The Air (MOTA) is an opportunity for Ham Operators to get out, enjoy our hobby and bring others (spotters) along for the ride. It is meant to promote the hobby, enjoy the world around us and bring a bit of history into our lives.
[ Hits: 124 | Votes: 0 | Rating: 0 ]

Longmont Amateur Radio Club Website - Serving the Longmont Colorado area
[ Hits: 129 | Votes: 0 | Rating: 0 ]

Maidenhead square Calculator - You can use this tool to calculate the maidenhead square by entering the longitude and latitude.
[ Hits: 146 | Votes: 1 | Rating: 8 ]

Tropospheric Ducting - In the spring and during certain climatic events, radio waves can travel long distances due to an atmospheric phenomenon called Tropospheric Ducting.
[ Hits: 123 | Votes: 0 | Rating: 0 ]

How to calculate Bearing and great-circle distance between two points - Calculate distance, bearing and more between Latitude/Longitude points. This page presents a variety of calculations for latitude/longitude points, with the formulas and code fragments for implementing them.
[ Hits: 197 | Votes: 3 | Rating: 3.33 ]

NewLogOSH - Program for Amateur Radio use, features Digital modes such as FT4 FT8 currently implemented along to RTTY, PSK modes, DXCLuster and Radio interfacing. The database is built in the Sqlite environment.
[ Hits: 570 | Votes: 2 | Rating: 8.5 ]