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• 40m QRO End Fed Half Wave Antenna Coupler - A medium power End Fed Half Wave Antenna coupler, specifically tuned to the QRP frequency of 7030 kHz. Constructed from coil stock and capacitors, it achieves an impedance ratio of 64:1. The coupler has proven effective for power ranges from 2 to 100 Watts on the 40m band.
  [ Hits: 104 | Votes: 0 | Rating: 0 ]

• ARRL - About Feed Lines - The feed line (also called the transmission line) is the RF power conduit between your radio and your antenna. The quality of your feed line is critical to your station. ARRL Article that explains differences among various commonly used feed line systems
  [ Hits: 88 | Votes: 2 | Rating: 6.5 ]

• The VHF UHF Eggbeater Antenna Revisited - A new, simple way to build the Eggbeater Antenna. This document introduces a new, simpler way to build the Eggbeater antenna. It also introduces a technically proper way to construct the Eggbeater antenna in order to achieve the best result.
  [ Hits: 536 | Votes: 4 | Rating: 6.5 ]

• Build a W3DZZ Antenna - The purpose of this construction is to enable the realization of an HF antenna called W3DZZ with minimal equipment and low cost. It allows traffic on the bands 3.5 / 7/14/21 and 28MHz.
  [ Hits: 219 | Votes: 1 | Rating: 1 ]

• TX6D Tahiti DXPedition - Our next DXpedition will take us to Tahiti, French Polynesia. From October 2 to October 15, 2023 we will be active with the callsign TX6D. We will be active with up to five stations from 160 m through 10 m on CW, SSB and digital modes.
  [ Hits: 62 | Votes: 1 | Rating: 10 ]

• HW44A Log Online - Online Log and OQRS for H44WA DX Pedition to Solomon Islands 2023
  [ Hits: 24 | Votes: 1 | Rating: 1 ]

• DXR Electronics Bits - Electronics and Technical resources from indian amateur radio ham D.Prabakaran with callsign vu3dxr
  [ Hits: 55 | Votes: 5 | Rating: 8.6 ]

• Schoharie County Amateur Radio Association - The Schoharie County Amateur Radio Association (SCARA) was established by a group of Schoharie County amateurs, along with a few from just over the County line in 1946. That date is based on the best we can find from old club records and recall of conversations with some of the original group, now all SK.
  [ Hits: 9 | Votes: 0 | Rating: 0 ]

• Ribbit digital text messaging mode for HF/VHF/UHF - Ribbit is a novel digital text messaging mode for VHF/UHF communications for recreational and emergency use which radically increases the density of information transmitted by spectrum used. It leverages the computing power of the modern smartphone to increase the capabilities of any Handy Talkie without requiring any additional hardware or cable. A Ribbit message is fixed in duration at 1250 milliseconds. It is sent over audio modulation with a 2kHz bandwidth centered on 1.5kHz. It is preceded by 400ms of white noise to open analog squelch circuits.
  [ Hits: 133 | Votes: 1 | Rating: 10 ]

• Receiving NOAA Weather Satellite Images - Receiving NOAA weather satellite images using a Raspberry PI with a RTL dongle and a Turnstile crossed dipole automatically.
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• Ham Crazy - HamCrazy provides various personalized hats, name badges, those light up call sign displays, decals for cars, even case plates for Apache cases
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• BktTimeSyncPhone - BktTimeSyncPhone synchronizes the PC time using the smartphone GPS connected via Bluetooth. Great for use with digital modes like FT8, JT65, JT9, JS8Call and others, especially when you do not have internet connections. To run this program, you need to install BktTimeSyncServer on your PC and the BktTimeSyncAndroid app on your smartphone. The program works with all versions of Windows 32 or 64 bit and requires Java version 8 or higher. The app requires an Android smartphone version 4.4 or higher.
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• Hamlog.online  ^updated - Hamlog is online cloud platform for active amateur radio operators. It supports various on the air activities of various clubs, associations and national amateur radio organizations, allows them to create award programs and deliver awards to those who earned them. Hamlog also has a built-in real-time logger, which allows operators to enter QSO in the system as they make them. It supports multiple callsigns, multiple locations, multi-station activities, etc. Soon it will allow to connect transceivers and other ham radio devices right to the browser, allowing easy online logging virtually anywhere.
  [ Hits: 52 | Votes: 1 | Rating: 10 ]

• QRZ.sh - This script queries the QRZ.com callsign database and returns the result to the command line. A XML subscription plan with QRZ.com is required for full functionality. QRZ.com callsign data query script written in Bash
  [ Hits: 60 | Votes: 0 | Rating: 0 ]

• Python Telegram bot for QRZ.com lookups - This is a Telegram bot written in Python that does ham radio call sign lookups via QRZ.com. This bot requires a paid QRZ.com account with XML access, in order to use the QRZ.com lookup feature of this bot a token for a Telegram bot
  [ Hits: 35 | Votes: 0 | Rating: 0 ]

• SWLog - Shortwave and Amateur Radio Log (SWLog) is a modern suite of applications that provide logging and remote control for amateur radio and shortwave, utility, and broadcast listening. SWLog has been continuously improved and expanded since it was first released in 1988. SWLog is a suite of products that provides logging, radio control, GPS synchronization, QSL management, reporting, and propagation prediction. Program schedules from HFCC, ILGRadio, AOKI, ADDX, SWSkeds, EiBi, and others are leveraged for broadcast reception. Call sign lookups and remote logbooks are integrated with ClubLog, eQSL, QRZ, Ham365, HamQTH, and LoTW. SWLog provides Android and iOS applications for logging on the go as well as web servers for logging and remote control from anywhere. SWLog works on Windows, Linux, iOS and Android
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• Fully automatic antenna switch project - Cheap and simple fully automatic antenna switching that permit to automatically select the proper antenna based on transceiver status activity.
  [ Hits: 88 | Votes: 0 | Rating: 0 ]

• Band Decoder Arduino - Arduino/ATtiny Based (Ham Radio) ICOM CIV to Yaesu BCD Band Decoder. Build a ICOM CIV to Yaesu BCD Band to automatically band switch the Yaesu Quadra Amplifier.
  [ Hits: 63 | Votes: 0 | Rating: 0 ]
• Arduino Digital Transceiver Project - Arduino Digital Transceiver (ADX) is a low-cost HF transceiver for digital modes. This Arduino-based project, inspired by QDX, features four bands, including 80m and 20m, supporting FT8, FT4, JS8call, and WSPR. Designed for simplicity and affordability, it uses an Arduino Nano, SI5351 module, and CD2003GP receiver. The ADX project emphasizes easy procurement, construction, setup, and operation, making it an accessible option for QRP enthusiasts. The firmware update enhances functionality, including CAT control support.
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• Mini Satellite-Antenna Rotator Mk1 - This project is a portable device used to automatically point a directional antenna towards an orbiting satellite. It takes all the effort out of little kids holding the antenna and figuring out where to point it. It allows students to talk through Amateur Radio satellites or download weather satellite images. Note: This is a complex DIY project for the advanced kit constructor.
  [ Hits: 287 | Votes: 1 | Rating: 1 ]

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