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Antennas : 160M
  • Vertical antenna for 160 meter - This high antenna require a large ground composed by 40 radials. It's not very handy expecially in windy situations but is very powerfull in pile-ups. In italian
    [ Hits: 4136 | Votes: 1 | Rating: 10 ]
Antennas : Feed Lines
  • Magic T combiners splitters - The magic "T" combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads. It is not a magic bullet.
    [ Hits: 1316 | Votes: 2 | Rating: 8.5 ]
Antennas : Portable
  • DCTL Portable Antenna - A Low -Power, Distributed Capacitance Twisted Loop , indoor portable HF antenna by Monty Northrup, N5ESE
    [ Hits: 2158 | Votes: 2 | Rating: 10 ]
Antennas : Theory
  • RMS power - How it's misused and misunderstood, and why it's not useful.
    [ Hits: 677 | Votes: 3 | Rating: 6.67 ]
Antennas : Tuners
  • W8ZR High-Power Antenna Tuner - This homebrew legal-limit antenna tuner is based on the famous "Ultimate Transmatch" introduced by the late Lew McCoy, W1ICP. The Ultimate Transmatch was described in the "Beginner and Novice" section of the July 1970 QST (Page 24).
    [ Hits: 11495 | Votes: 10 | Rating: 8.1 ]
  • Getting the most from your tuner - Here is how to adjust this popular tuner circuit so it transfers maximum power to your antenna without going snap
    [ Hits: 2825 | Votes: 3 | Rating: 6.33 ]
  • Emtech ZM-2 Antenna Tuner Kit - The Emtech ZM-2 Antenna Tuner is a nifty little portable transmatch for QRP (low power). It utilizes the well-known Z-match circuit, which is especially useful for balanced antennas (like dipoles and loops).
    [ Hits: 3431 | Votes: 6 | Rating: 5.33 ]
DX Resources : Contest : Resources
  • Getting started in contest - A PowerPoint presentation by Bruce Draper, AA5B on how to get started in contesting, no matter if you are a big gun or a little pistol
    [ Hits: 951 | Votes: 1 | Rating: 1 ]
Manufacturers : Antenna Parts : Aluminium Tubing
  • Lashen Electronics - From connectivity for the home or small office and home theater cabling solutions to power management and protection as well as home and office sound and video solutions, lashen electronics has the tools and technology you need to do the job right.
    [ Hits: 669 | Votes: 3 | Rating: 10 ]
Manufacturers : Microwave
  • Maxdao Technologies - Maxdao: offer you 7/16, N coaxial connectors, jumper cables, feeder clamps and grouding kits, surge arresters & brackets, wall entries and microwave components used in base tower, power dividers, couplers
    [ Hits: 546 | Votes: 1 | Rating: 10 ]
Manufacturers : Test Equipment : Frequency Counter
  • Madell Technology Corporation - Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products
    [ Hits: 1102 | Votes: 4 | Rating: 5.5 ]
Operating Modes : Meteors
  • F5VLB amateur radio astronomy station - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.
    [ Hits: 1618 | Votes: 4 | Rating: 10 ]
Propagation : MUF Indicators
  • Near-Real-Time F2-Layer Critical Frequency Map - This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space. The map shows the radio auroral zones as green bands near the northern and southern poles.
    [ Hits: 5270 | Votes: 24 | Rating: 4.84 ]
Software : Circuit Design
  • JavaScript Electronic Notebook, K7MEM - It consists of a group of JavaScript driven web pages that are intended for use as a quick reference for Ham Radio operators or just anyone interested in electronics. Offer calculators for Resistors, capacitors, inductors, power supplies, filters, attenuators and antennas
    [ Hits: 3222 | Votes: 16 | Rating: 7.62 ]
Software : Logging
  • Aether - Aether is an ham radio logging for the Mac. Aether gives hams logging software that is as powerful, easy to use, and good looking as the operating system it runs on. Designed from the ground-up using Apple's Cocoa, Aether supports the latest Mac OS X technologies, and provides the experience that Mac users expect.
    [ Hits: 3054 | Votes: 10 | Rating: 8 ]
Technical Reference : Amplifiers : HF Amplifiers
  • LA7MI 40W RF Amplifier for 80m - 40W Linear Power amplifier with FETs for 80m Some notes about saturation in ferrite- and iron-cores. Written by LA7MI Stein Torp, N-5005 Bergen
    [ Hits: 3024 | Votes: 2 | Rating: 1.5 ]
  • A 20m monoband Power Amp - The 20m monoband 4-1000 amplifier, by Jelmer (pa5r), Herman (pa0ten) and Frans (pa5ca)
    [ Hits: 2890 | Votes: 2 | Rating: 9.5 ]
Technical Reference : Arduino
  • HamShield for Arduino - HamShield is a powerful VHF UHF transceiver that lets your Arduino talk to far away people using ham radio bands
    [ Hits: 1083 | Votes: 2 | Rating: 4 ]
Technical Reference : QRP Projects
  • QRP 12V Power Pack - A perfect companion for your Elecraft K1 or any other (not power hungry...) QRP rig
    [ Hits: 1600 | Votes: 1 | Rating: 1 ]
  • Low-Power Transceiver Kits You Can Build - A Comprehensive roundup of the most popular QRP transceiver kits on the market in recent years in PDF format
    [ Hits: 2417 | Votes: 1 | Rating: 10 ]

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