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Antennas : 80M- Umbrella Antenna for 80 Meters
- An umbrella antenna is basically just a vertical monopole antenna that is top-loaded with a large end-hat. The hat consists of a number of radial wires that slope away, downward from the top of the antenna.
[ Hits: 925 | Votes: 0 | Rating: 0 ]
- Antenna Theory : Baluns
- This article describe the principles of baluns when referred to devices used to balance unbalanced systems, like a coax cable and a dipole antenna
[ Hits: 706 | Votes: 2 | Rating: 9 ]
- 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 ]
- K7CSW - Saltlake Peaks Amateur Radio Club
- SPARC The Saltlake Peaks Amateur Radio Club, founded by employees of L-3 Communications located in Salt Lake City, Utah at the Communications Systems West Division.
[ Hits: 165 | Votes: 0 | Rating: 0 ]
- Argent Data Systems
- Small company based in Santa Maria, California, designing and manufacturing electronic products for amateur radio, education, and commercial users. Product line includes APRS devices for real-time vehicle tracking, weather monitoring, and remote telemetry, as well as the ADS-SR1 Simplex Repeater, the ADS-WS1 Weather Station, the SSTVCAM slow-scan TV camera, and GTRANS protocol translator for Garmin FMI.
[ Hits: 208 | Votes: 0 | Rating: 0 ]
- Portable Zero LLC
- Portable Zero LLC is a small company dedicated to the goal of creating unique products that enhance and promote portable amateur radio operations. Tactical Carrying System, Tactical Battery Pack Systems, aluminum carrying case systems for Yaesu FT-857,FT-817,ICOM IC-706/703
[ Hits: 509 | Votes: 1 | Rating: 10 ]
- Small Panel Kits
- High performance, IPX7 waterproof small solar panels and battery packs to power radios, sensors, and other portable devices. Solar panels are UV and scratch resistant for long-term use in the field.
[ Hits: 331 | Votes: 0 | Rating: 0 ]
- ASELSAN
- Established in 1975, ASELSAN, has become a high technology, multi-product establishment by introducing state-of-the-art products and systems solutions for both military and professional applications.
[ Hits: 328 | Votes: 1 | Rating: 10 ]
- RADIO DATA
- A privately owned company, has a proven and successful record in the design and reliable implementation of Professional Mobile Radio (PMR) equipment and systems for voice and data communications.
[ Hits: 225 | Votes: 0 | Rating: 0 ]
- Duracomm Power Supplies
- Power Solutions for Durable Communication Systems. Founded in Sep. 1992, DuraComm Power Supplies is a worldwide recognized leader in ultra-reliable AC-to-DC switch mode power supplies commonly used in the communications industry.
[ Hits: 140 | Votes: 0 | Rating: 0 ]
- Alpha Power Systems LLC
- Alpha Power Systems, LLC is committed to offering the highest quality of surge protection and power quality products, such us Backup UPS available with service second to none
[ Hits: 131 | Votes: 0 | Rating: 0 ]
- Ganymede - QRSS TX
- Designs for QRSS TX and other Arduino based systems
[ Hits: 379 | Votes: 0 | Rating: 0 ]
- Working 160M From a Small Lot
- A 109 pages presentation in PDF File by Jim Brown K9YC on techniques in operatint the top band from a small lot.
[ Hits: 689 | Votes: 4 | Rating: 9.75 ]
- TE Systems 1452G Product page
- Official product page of the 1452G RF Amplifier by TE Systems
[ Hits: 408 | Votes: 0 | Rating: 0 ]
- Repairing a TE-Systems 1452G
- Slides of a TE systems 1452 reparation including the schematic diagram of this monoband VHF RF Power amplifier
[ Hits: 488 | Votes: 4 | Rating: 7.25 ]
- TE Systems 1452G Reviews
- eHam reviews of the TE Systems 1452G 2m mobile power amplifier
[ Hits: 207 | Votes: 0 | Rating: 0 ]
- Audacity
- Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. The interface is translated into many languages.
[ Hits: 734 | Votes: 0 | Rating: 0 ]
- Ham Radio TVI in the 21st Century
- Ham radio transmissions can interfere with television reception. This is called television interference, or ham radio TVI. Consumer adoption of cable television has significantly reduced ham radio TVI. But the introduction of IPTV, or television over phone systems, has brought ham radio TVI back, often with a vengeance. Here's why
[ Hits: 322 | Votes: 0 | Rating: 0 ]
- Open Repeater
- The Raspberry Pi Repeater Controller Project goal is to develop a low cost, low power, but feature rich duplex repeater controller suitable for setting up a temporary or emergency repeater systems with radios that can be run on portable power
[ Hits: 2028 | Votes: 18 | Rating: 7.39 ]
- Crystal Radio Set Systems
- The main purpose of these Articles is to show how Engineering Principles may be applied to the design of crystal radios. Measurement techniques and actual measurements are described.
[ Hits: 277 | Votes: 0 | Rating: 0 ]
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