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Antennas : 10M
  • Homebrew a 10 meter dipole antenna - Build a 10 Meter Technician Class Dipole antenna. Get on 10 Meters fast with this basic 10 Meter Dipole project by hamuniverse
    [ Hits: 7184 | Votes: 18 | Rating: 7 ]
Antennas : Baluns
  • How to Make a Great 9:1 RX Transformer - There are lots of good designs for matching transformers for receiving antennas. Make it yourself it's cheap and easy, and very high performance. This is the design used in the TRX-9 transformers.
    [ Hits: 3142 | Votes: 0 | Rating: 0 ]
Antennas : End-Fed
  • End fed-Halfe-wave antenna - This type of antenna has same performance as a dipole, but requires only one single mounting point
    [ Hits: 7818 | Votes: 8 | Rating: 8.26 ]
Antennas : Feed Lines
  • The Coaxial Line - Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
    [ Hits: 888 | Votes: 0 | Rating: 0 ]
Antennas : Feed Lines : Choke
  • Noise Reduction on 40m - DF9CY implementation of W1HIS suggestion of inserting a common mode choke into a 40m antennas feed-line.
    [ Hits: 1383 | Votes: 0 | Rating: 0 ]
Antennas : Homebrewing Techniques
  • Home-brew Antennas - Notes on homebrewing antennas by Chris G4CYA, from gamma matching, to phasing antennas, splitters and combiners, baluns and measuring techniques.
    [ Hits: 3154 | Votes: 1 | Rating: 10 ]
Antennas : J-Pole
  • 20 Meter Jpole Vertical - The J pole vertical for 14MHz is built from a fifty-foot TV push up mast by Mike Higgins, K6AER
    [ Hits: 7836 | Votes: 6 | Rating: 6.5 ]
Antennas : Sloper
  • ARRL Sloper Antenna - Members only techical pages about Sloper antennas
    [ Hits: 3643 | Votes: 1 | Rating: 10 ]
Antennas : Theory
  • Polarization, lines of force - While polarisation may seem insignificant compared with other considerations in setting up a communications system, choosing the right type can make significant improvement in performance.
    [ Hits: 524 | Votes: 0 | Rating: 0 ]
  • Matching Waves, VSWR at work - When the radiation resistance (voltage to current ratio) of an antenna is the same value as the characteristic impedance of the transmission line (voltage to current ratio in the line), all of the electrical energy transmitted down the line is taken by the antenna and radiated into space in the form of a radio wave.
    [ Hits: 507 | Votes: 0 | Rating: 0 ]
Antennas : Theory : Antenna Gain
  • Antenna Gain to ERP - A radio's transmitting power can be concentrated along the horizon by use of a GAIN antenna. Although you may still be transmitting with four watts of power, your effective radiated powerwill be greatly increased. This table shows the effects of antenna gain on a transmitter with 4 watts of transmit power.
    [ Hits: 1385 | Votes: 4 | Rating: 4.5 ]
Manufacturers : Power Supply
  • Astrodyne - Dedicated to the design, manufacturing, technical support, and delivery of innovative and cost effective power solutions for worldwide applications. AC/DC switching power supplies and DC/DC converters.
    [ Hits: 684 | Votes: 0 | Rating: 0 ]
Operating Modes : D-STAR
  • What can D-STAR do for me? - Introduction to D-STAR features and advantages that this new technology can bring to you.
    [ Hits: 605 | Votes: 1 | Rating: 6 ]
Operating Modes : D-STAR : D-Star Clubs
  • Philadelphia Digital Radio Association - Experiments with, and implements various forms of amateur radio digital communications. The Association is dedicated to the advancement of amateur radio technology
    [ Hits: 339 | Votes: 2 | Rating: 5.5 ]
Operating Modes : Mobile
  • Mobile Radio Noise Elimination - If you're driving around town listening to the buzz and engine whine blues, pick up this free pub and help yourself enjoy the music. Includes troubleshooting techniques and helpful hints.
    [ Hits: 886 | Votes: 2 | Rating: 7 ]
Radio Equipment : Reviews and Comparisons
  • How QST evaluates new products - A look behind the scenes, learn how the ARRL laboratory evaluates new products, and what all those numbers mean to you by WA1SVF
    [ Hits: 645 | Votes: 0 | Rating: 0 ]
Radio Equipment : VHF-UHF Handhelds : Yaesu VX-6R
  • VX-6R Technical Supplement - This manual provides the technical necessary for servicing the VX-6R Yaesu Transceiver
    [ Hits: 1571 | Votes: 2 | Rating: 10 ]
Shopping and Services : Accessories
  • Ham Radio Deals - Dealer for Alpha Delta hf antennas, switeches, Outbacker and super antennas, morse code keys, coax cable and military products, managed by W8GEG from Medina Ohio
    [ Hits: 932 | Votes: 5 | Rating: 9 ]
Technical Reference : Attenuators
  • A Rugged compact attenuator - This attenuator is worth your attention. Built like the proverbial brick outhouse, it's one you can easily duplicate by N9SFX Pdf file
    [ Hits: 2428 | Votes: 2 | Rating: 8 ]
Technical Reference : Batteries
  • Batteries for Emergency Communications - The purpose of this paper is to provide a basic understanding of the different types of batteries available on the market today so the reader can make an educated decision about what type of battery will best meet their needs for Amateur Radio emergency communications Brett Hammond - KB3HGP
    [ Hits: 480 | Votes: 1 | Rating: 1 ]

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