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Antennas : 160M
  • Short Vertical for 160 meters - A top band shortened vertical antenna project. This project includes drawing and MMANA-GAL output screens.
    [ Hits: 307 | Votes: 2 | Rating: 9 ]
Antennas : Tuners
  • L-Match Tuner Build for QRP Operation - An L-Match tuner is a device that can add either inductance (L) or capacitance (C) to the antenna, bridging that gap between 5000 ohms and 50 ohms, thus matching it to the radio. The L-Match tuner is an extremely useful device that every QRP operator will want to have.
    [ Hits: 185 | Votes: 0 | Rating: 0 ]
Antennas : Wire
  • The Squid Pole Wire Antenna Re-visited - The author explores enhancing the performance of a 7-meter fiberglass squid pole wire antenna for amateur radio. The wire, resonant at 10MHz, poses impedance challenges on various bands. Experimenting with direct coax feed and UN-UN transformers, the LDG Z11-Pro2 auto-tuner is found effective but may show deceptive SWR readings. The author employs adjustable UN-UN ratios and introduces a custom "porcupine" coil to optimize the antenna's efficiency.
    [ Hits: 87 | Votes: 0 | Rating: 0 ]
DX Resources : Beacons : Beacon Monitoring
  • NCDXF Beacons Transmission Schedule - Whatch at beacons transmitting in real time. This page contains a self refreshing table that displays every 10 seconds the current transmission schedule of the international beacon project. Tune your radio and check the beacon you are hearing.
    [ Hits: 323 | Votes: 0 | Rating: 0 ]
DX Resources : Contest Calendars
  • CDXA Periodic Table of Contests - A yearly contest calendar with most interesting amateur radio contests and QSO parties collected by Carolina DX Association
    [ Hits: 299 | Votes: 1 | Rating: 1 ]
DX Resources : Contest : Resources
  • RTTY Contesting, A to Z - Getting started on RTTY contesting. A PDF by ED Muns, presented at CTU conterst university, about amateur radio RTTY Contesting
    [ Hits: 569 | Votes: 1 | Rating: 10 ]
Ham Radio : Clubs : North America : USA : Kansas
  • W0CW Kansas City DX Club - Established in the mid 1970's The Kansas City DX Club is an ARRL-affiliated amateur radio club open to anyone interested in DX or contesting. Our club callsign is W0CW. Many of our club members are from the Kansas City metropolitan area, on both sides of the Missouri/Kansas state line, but our roster also includes members from all over the United States.
    [ Hits: 52 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : Texas Ham Radio : Clubs : North America : USA : Wisconsin Manufacturers : APRS
  • APRS Radio Shield for Arduino - The Radio Shield is an add-on kit for the Arduino development board that provides AX.25 packet radio send and receive capability, a prototyping area, and an HD44780-compatible LCD interface.
    [ Hits: 748 | Votes: 1 | Rating: 2 ]
Operating Aids : Logbook Operating Aids : Maps
  • World Grid Square Map PDF  updated - This free PDF file contains two Worldwide grid square maps. The first map displays the fields (first two letters of a maidenhead locator) while the second includes also squares (third and fourth digit) and it can be useful to determine what is your ham radio grid square. PDF file can be enlarged and scaled to A3 and higher dimensions.
    [ Hits: 3269 | Votes: 14 | Rating: 7.15 ]
Radio Equipment : HF Transceivers : ICOM IC-756
  • Display Transplant into an Icom IC-756 - This article is about replacing the LCD display in a Icom IC-756 classic. The displays in these radios have not been supported by Icom in several years.
    [ Hits: 234 | Votes: 1 | Rating: 10 ]
Shortwave Radio : Broadcasters : Time Signal Radios
  • Radio Station WWV - NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD time code, and geophysical alerts
    [ Hits: 52 | Votes: 1 | Rating: 10 ]
Software : Signal Generator
  • 16 DTMF Tone Generator Keypad App - This app will give you a 16 tone DTMF keypad and the ability to generate custom DTMF sequences, and set the duration and tone to silence ratio. Includes the characters 1234567890*# and the menu tones ABCD. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability. This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators
    [ Hits: 724 | Votes: 4 | Rating: 7.75 ]
Technical Reference : Antenna Rotator
  • LCD Touch Screen Antenna Controller - In this article, K8CU describes his custom design that uses an embedded controller and touch screen LCD panel.
    [ Hits: 456 | Votes: 1 | Rating: 10 ]
Technical Reference : Headsets and Speakers
  • Computer headset adapted for Ham Radio Usage - Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram
    [ Hits: 178 | Votes: 0 | Rating: 0 ]
Technical Reference : Homebrew
  • Homebrew Spectrum Analyzer - Project for DXers and experimenters alike. An old article publishes by 73 Amateur Radio magazine in PDF format, where all the components required to build your own HF spectrum analyzer may be found in a well-stocked junk box.
    [ Hits: 770 | Votes: 0 | Rating: 0 ]
  • Experimental HF 6-band SSB transceiver - An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front panel backlight.
    [ Hits: 709 | Votes: 14 | Rating: 9.86 ]

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