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- Technical Reference > Radio Frequency Interference > PLT
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Info on this discontinued HF Transceiver -
Contest Log Converter it's a Windows program that allow to convert data file between the most used Contest Log. The program allow you to convert 12 different type of contest, selected from the common contest managed from the Contest Log program. The follow program ,CT by K1EA, TR by N6TR and NA by K8CC are full supported with the conversion of the most famous world contests. -
Freeware Win98/NT/XP contest logging program, supports over 270 contests, Grid Square distance/heading routines, plus Grid maps by Dave Mascaro W3KM -
A project by G3SYC of a log periodic antenna for 6 meters band -
A modern version of the classic regenrative receiver designed and built by Charles Kitchin ARRL Article -
A reversable quad antenna for 40 meters band by N4JTE -
QSO Map Deactivated Due to a new pricing structure for Google Maps APIs (since March 1, 2025), the map function is no longer free to use. For this reason, the QSO Map has been deactivated. -
A Simple Nondirectional Antenna for Ten Meters QST February 1950, Easy to build J-Pole antenna for restricted space. -
A shortened and invisible wire antenna for 7 MHz -
The document is a PDF detailing the construction of the DBJ-1 VHF-UHF Dual Band J-Pole antenna for amateur radio use. It provides instructions on how to build a high-performance dual band base antenna for VHF and UHF bands using a single feed line for less than $10. -
An HF QRP CW RTX built around the Arduino open-source electronics prototyping platform -
AEA Technology Inc. is a pioneer and leading manufacturer of RF and cable test equipment for the wireless, Telco, CATV, NMR & MRI, RFID, telemetry, aviation, commercial, military, and two-way radio industries. Produces SWR Meters, Pre Amplifiers, filters, power meters and antenna testing products -
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A 20 meter quarter wave vertical antenna by jerry sevick W2FMI QST Article -
A free to download and print, amateur radio station log sheet in a paper US letter format -
Building guide for a two element quad antenna planned for 28 and 21 Megahertz -
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Comprehensive contesting software for SSB, CW, RTTY and PSK. For Windows. -
Open source Arduino based CW (Morse Code) keyer with a lot of features and flexibility, often rivaling commercial keyers. -
A homebrew project for a 2 meter 4 element yagi beam antenna by 2E0HTS -
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French manufacturer (F5MSU) of antennas and accessories since 1999 : Yagi, Delta-loop, dipoles, T2FD, verticales, EFHW, baluns, ununs, etc. -
Amateur Radio Call Log is a basic ham radio logging app for Android 1.5 and above. It stores Date, Time, Station, Freq, Mode, RST, and additional comments. Also has the ability to easily look-up callsign information from the FCC database. -
Log periodic antenna design excel sheet file download, in italian. -
Here are construction plans of a Turnstile antenna that I use for space communication on the 2 meter amateur radio band. -
The IK-STIC 2 is a vertical, all band, antenna that is over 25 feet tall yet weighs under 5 pounds. Based on a telescopic pipe or a fiberglass fishing pole, using a tuner it can easily cover the amateur radio HF bands from 40 - 10 Meters -
Simple gain antennas for the beginner, a 2 element HF yagi antenna -
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The K4VX linear-loaded dipole for 7 MHz, simple and practical way to make a short but efficient 40-meter dipole. -
KO4NR coax cable antenna switch construction by ve3cgc -
YPLOG logging software for Windows support Icom and Kenwood Radios, map programs and a program for coaxial trap design. -
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5 elements "vee" log-yagi for 10m band- boom lenght : 4mt. Gain : over 10 dBd , f/b =over 40 db (deep null) f/b= min 20dB for different polarization signals -
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A free to download and print, log sheet in A4 paper format for amateur radio stations -
Do your multiple-transmitter field day or contest efforts suffer from intrastation interference ? -
Quality logging software for the Radio Amateur & SWL, real-time and post-event QSO logging,log analysis and reporting, QSL label printing, country status display, rig control, import of logs, interface to CallBook CD-ROMs -
RFI/EMI RadioFrequency interference/electromagnetic interference by ARRL Technical Information Service page -
Good tools are priceless when you need them. Here's a piece of test equipment you've always wanted for your workbench -
An cheap homemade azimuth and elevation rotation system using an Arduino/AVR. -
10 to 20 meters band log-periodic antenna project with SWR Plots, boom lenght and element spacing. -
Database logbook for OM SWL BCL & CB with utility like DXCLuster DXtelnet PSK PSK-Pbbs (TNC or PC sound card) radio rotor CDbook interface and many other features. Free Update at homepage. -
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Log and Contest Program, Windows based, network capability, CW via COM/LPT, SSB/RTTY via soundcard, trcvr-Steuerung (2TX for SO2R etc.), DX-cluster via packet, internet or telnet, statistics(DXCC, IOTA, locators...), log import/export, QSL card handling(printing tool), grey land map etc. etc. and freeware! -
An interesting rotator interface that interfaces a pc to a rotor or rotator controller, emulating a Yaesu GS-232A/B and Easycom protocols, made with Arduino -
Get the most out of the shortwave listening hobby. Follow these steps to get started with your new radio. -
SD sets the standard for fast, simple logging and editing in the major international contests and in dozens of others worldwide. SD by EI5DI is a free HF contest logger for windows. -
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A multiband end-fed antenna that cover 3.5 to 30 Mhz using a 1:64 Balun based on a FT240-43 core