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357 links - and 7 categories

2m Big Wheel Antenna - A Useful Horizontally Polarised Omni-directional Antenna with Gain for 144 MHz
[ Hits: 1323 | Votes: 4 | Rating: 7.75 ]
A Portable Quad for 2 Meters - Backpacking, boating or mountaintopping ? Invest your time and pack this novel directional gain antenna on your next expedition
[ Hits: 1577 | Votes: 7 | Rating: 6.86 ]
Tape Measure 2M Beam - A Tape Measure Beam Antenna for Radio Direction Finding based on WB2HOL design.
[ Hits: 571 | Votes: 0 | Rating: 0 ]

Six Meter Quad Turnstile Antenna - Simple 6 Metre DX Antenna based on an article by LB Cebick in QST May 2002 on a Quad Turnstile antenna. This antenna is basically two full wave loops mounted at right angles fed 90 degrees out of phase to produce an omni-directional horizontally polarized pattern
[ Hits: 702 | Votes: 2 | Rating: 9.5 ]

How to make a HB9CV - The HB9CV is a well known two element antenna of a directional beam type with a forward gain of 4 to 5 dBd. This one is for two metres but it can be scaled, from the dimensions in the diagram, for other bands I have also made them for four and six metres
[ Hits: 1476 | Votes: 9 | Rating: 4.45 ]

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

Build your own Hexagonal Beam - A web site dedicated to hex beam homebrewing. The hexagonal beam has become a wildly popular antenna. It is a directional antenna that provides great performance and does not require a full scale, expensive tower.
[ Hits: 1174 | Votes: 2 | Rating: 6.5 ]

Home made High Power Magnetic Loop Antennas - Magnetic Loop Antennas for The Radio Operator with Limited Space, a two part series of articles on how to construct a magnetic loop antenna, including directions on selecting high voltage tuning capacitor
[ Hits: 896 | Votes: 0 | Rating: 0 ]

2m Band Moxon - Moxon is a rectangle shaped directional antenna, originally designed by Les Moxon G6XN. There are couple of advantages of using this antenna. It is small in size, Easy to mast, Balanced to 50 Ohms, Near 1:1 SWR, Excellent Front to Back (F/B) ratio, Large bandwidth
[ Hits: 583 | Votes: 1 | Rating: 6 ]

WiFi Spider Antenna - Quarter wave omni-directional spider antenna for 2.4GHz 802.11b
[ Hits: 1010 | Votes: 8 | Rating: 7.5 ]

Contest Online Score Board - Contest Online Score Board server, collect real time contest scores directly from the most popular Contest Log programs and displays aggregated live scores on contest pages. Support several contest and many contest log software.
[ Hits: 524 | Votes: 2 | Rating: 9 ]

K8UR Phased Array Switchbox - A Phased Array Switchbox by ComTek founder K8UR, switch your 4-Square in 8 directions and control it remotely over the internet
[ Hits: 318 | Votes: 2 | Rating: 5.5 ]

IC-7300 Yahoo Group - This group is devoted to the new IC-7300 direct-sampling SDR HF/6m transceiver, which was announced at Tokyo HamFair 2015.
[ Hits: 1520 | Votes: 4 | Rating: 6.25 ]
Review of the Icom IC-7300 - A very informative review of the Icom IC-7300 direct RF sampling transceiver, including audio samples, recordings and a comparison vs the Elecraft KX3
[ Hits: 525 | Votes: 3 | Rating: 10 ]

Diamond CP22E Review - Diamond Antenna CP22E VHF base station antenna review. This antenna has a remarkable design achieving 5 dBi directivity in a slim low-profile design.
[ Hits: 478 | Votes: 0 | Rating: 0 ]

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 ]

Arduino SWR and Power Meter - The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler
[ Hits: 1586 | Votes: 3 | Rating: 6.67 ]

Raspberry Pi Weather Station - A complete DIY Raspberry Pi Weather Station including software, capable to read wind speed, wind direction, rain gauge and with a temperature and humidity sensor along to a camera.
[ Hits: 1375 | Votes: 5 | Rating: 4.6 ]

30m direct conversion receiver - A schematic diagram of a homemade direct conversion receiver for 30 meters band
[ Hits: 384 | Votes: 0 | Rating: 0 ]

A Modern Directional Power/SWR Meter - Every ham needs an RF power meter. Here is a high performance unit to build at home.
[ Hits: 1564 | Votes: 2 | Rating: 5.5 ]