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- Technical Reference > 3D Printed Projects
- Technical Reference > Digital ATV projects
- Technical Reference > QRP Projects
- Antennas > 12M
- Antennas > 20M > 20 meter Dipole Antennas
- Antennas > 40M > 40 meter Delta Loop Antennas
- Antennas > 40M > 40 meter Loop Antennas
- Antennas > 40M > 40 meter Vertical Antennas
- Antennas > 40M > 40 meter Yagi Antennas
- Antennas > 6M > 6 meter J-Pole Antenna
- Antennas > 70cm
- Technical Reference > Antenna Rotator
- Technical Reference > APRS
- Technical Reference > Arduino
- Technical Reference > ATV
- Technical Reference > Batteries > Battery Charger
- Antennas > Bazooka
- Antennas > C-Pole
- Antennas > CobWebb
- Technical Reference > DTMF
- Technical Reference > Frequency Counter
- Antennas > G5RV
- Technical Reference > Headsets and Speakers
- Antennas > Log Periodic
- Technical Reference > Arduino > Morse Code
- Technical Reference > Morse Code Decoder
- Technical Reference > Power Supply
- Technical Reference > Receivers > Progressive Receiver
- Technical Reference > QRM Eliminator
- Technical Reference > QRP Projects > QRP CW Transceiver
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N3OX three meters Flex Vertical, a Short, Frequency Agile Vertical for 40 meters -
Simple 6 Metre DX Antenna based on an article by LB Cebick in QST May 2002 on a Quad Turnstile antenna. This antenna is basically two full wave loops mounted at right angles fed 90 degrees out of phase to produce an omni-directional horizontally polarized pattern -
M1HOG Direct Conversion Experiments -
A project with schematic to build a receiver for 80 meters band by VK1PK -
This transmitter was first constructed in 1987 and provided the author with his first real rig, capable of distances of more than about 100 metres.Use a 6GV8 tube. -
A collection of modifications and improvements to the Ameritron ALS-600 ham radio RF power amplifier -
The idea makes use of a very simple direct conversion receiver on the band of interest. -
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Modify a KPC-9612 to give a total of four analog input for remote monitoring and telemetry. -
FLMSG is a simple forms management editor for the amateur radio supported standard message formats. Form data can be transferred between computers either using standard internet email or via radio frequency broadcasts typically made by an amateur radio operator on your behalf. -
A battery voltage booster project with pictures and schematic by KD7W -
HF on a budget. Assembling a Softrock Software Defined Radio -
This converter uses the popular NE602 mixer/oscillator chip and allows reception of signals below 500 kHz on a 3.5 – 4 MHz HF receiver -
An HF vertical antenna by N3OX with a flexible capacitance hat -
AX.25 Packet Modem homebrew project on Arduino -
Make and automatic antenna tuner based on Arduino and using economic card. This ATU Project can be installed outdoors and controlled remotely by an rs485 link -
Heathkit SB220 refurbishing by PA5CA -
Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell N1HFX -
Two find dipoles one for 75/40/20 and the other for 20/15. These 2 dipoles are at right angles to each other and the 20/15 dipole is located about 6 feet below the 75/40/20 fan dipole. -
by K6LCS Clint Bradford - Amateur Radio and Commercial Communications. A few current projects, and a little insight into how Clint’s mind works. -
Some modifications for the Tigertronics Signalink USB sound card radio interface -
Log viewer for WSJT-X is an external utility to parse the WSJT-X log and check for duplicate contacts or making additional analysis. -
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Elecraft K3 vs. ICOM IC-781 vs. Kenwood TS-850: comparative Measurements and Experience -
The page provides detailed information on a compact two-element yagi antenna, also known as the Moxon rectangle, specifically designed for the 17 meters band. It includes construction details, evolution history, performance data, and comparison with a 1/2 wave dipole antenna. -
Converting a CB Radio for 10 meter use -
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Ian G6TVJ design for a synthesised ATV transmitter covering the 13cm band and beyond up to about 2.6 GHz. -
This circuit is very simple and has a fantastic range of potential uses. -
A collection of audio amplifier projects by N1HFX -
DragonOS is a linux distribution dedicate to Software Defined Radio. It leverages the portability, security, and power of Lubuntu Linux as a delivery package and operating environment for a pre-installed suite of the most powerful and accessible open source SDR software. DragonOS has verified support for a range of inexpensive and powerful SDR hardware, including RTL-SDR, HackRF One, LimeSDR, BladeRF, and many others. -
N1HFX project to improve PL tone encoder providing a more stable frequency -
This article was first published in CQ-TV issue 208. Author try to explain digital television in layman's terms and without getting too involved in mathematics. -
NHRC-2 Based Repeater Controller A perfect controller for a simple repeater or link, or portable/solar powered system. -
A Tape Measure Beam Antenna for Radio Direction Finding based on WB2HOL design. -
CAT & audio interface version 3 by pa5ca -
Some techniques on homebrewing yagi antennas by VK5AJL -
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LPI personnel have combined experience over many years in servicing customers throughout the world. Our experience covers projects in some of the most lightning prone areas. -
The workaday world of antenna & tower projects. Posted by K4ZA, Tower Works, Charlotte NC. -
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Crystal receivers, construction projects and plans, old-time crystal sets, hints, crystal receiver store. -
MultiPig+ CW Transceiver Kit Construction -
Balloon Projects, scheduled launches at amsat -
Battery-powered monitor designed to provide an audible indication of keying for those whose rigs lack a CW sidetone -
Amateur projects to investigate radiowave propagation - G3PLX's chirp project, ionosonde database, and more -
A stepper switch controller made with arduino by N3OX -
A Picaxe Morse Code keyer project with source code and links to useful resources by K6ACJ -
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Assembling the Elecraft KX1 Portable CW Transceiver Kit