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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 Meter
- Technical Reference > Power Supply
- Technical Reference > Receivers > Progressive Receiver
- Technical Reference > QRM Eliminator
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Contains digimodes, antenna projects, DX info and lots more -
KG4JJH moxon assembly plan for the 50 Mhz in a pdf file -
This strange looking antenna is a combination of Coupled-Resonator principle by K9AY and a quarter stubs to achieve low angle radiation pattern. Designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands -
A 144/440 dual band open stub J-Pole Antenna project by NT1K -
Sometimes amateurs like to home-brew their power supplies instead of purchasing one off the shelf at any of the major ham radio retail dealers. -
Enabling IC 706 for 4 meter band modification in italian. -
W6/PA0ZN CATV tuner based Spectrum Analyzer Building Project -
The page is about the 144 Mhz Dirty Beacon project, a VHF beacon keyer by 9A4QV. It provides technical information, project details, and resources for amateur radio operators interested in beacon keyers. The content is useful for those looking to build or learn about VHF beacon keyers. -
An inexpensive condenser microphone with excellent performance can be easily constructed with easily available parts. -
PA is a JAVA software package containing several programs, SW/VHF/UHF Logbook (imports format from RADIOMAN, VMT), Log conversion to HTML format, Import and export functions for RADIOMAN, CT RES files, BV QSL Labels, CSV etc. Internet DX-Cluster support, Keeps track of your worked Callsigns, Checks your worked Grid Squares per band, Databases for worked Grids and Callsigns Uses K1EA CQWW.CTY country file, Easy command line version for terminal operation Moontracking as clock, Pathloss calculation -
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Due to my job I have top travel a lot around the world, in order to find a way of making radio I decided to build a Magnetic Loop after some comments of other colleagues for working between 20 and 80 meters mainly. -
K9AY 160M / 80M Receiving Loop Antenna System by K7SFN -
Design Guidelines for Bipolar Transistor Audio Preamplifier Circuits By Mike Martell N1HFX -
50 MHZ Moxon antenna based on the KG4JJH design with some slight modifications in the construction -
A simple accurate power splitter for the 70cm uplink to Oscar 13 -
A simple TRAP-dipole project for 20 and 40m bands includes EZNec simulations -
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An Arduino APRS project based on the real time OS BeRTOS -
An interesting home made project of an L Network Antenna Tuner Project with pictures and schematics by K7SFN -
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Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX -
A lower power desktop linear with integrated 120vac power supply. This, very compact, dual 811 version will deliver about 300 watts output. Covers all bands including WARC bands. -
xdx is a dedicated Linux network client for amateur radio operators who want to exchange DX (long distance) radio information -
N1HFX article on adjustable voltage regulator -
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Some rules of thumb for beginners, with a QRP approach, by James R. Duffey KK6MC/5 -
G8JNJ Fat-Max HF Antenna - 6m to 40m - a poor man’s Steppir -
A Lindenblad Antenna for 145 MHz and 435 MHz with an integrated 50 MHz J-pole -
Paddles made from readily available materials, like double sided PC board material and cost almost nothing to build. -
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Build An Inexpensive Repeater Controller from a Basic Stamp 1 or 2 By Roger Cameron -
This is a design for a stealthy HF multi-band vertical wire antenna using a tree as a supportby G7AQK -
This article document a 2 element half wave collinear J-Pole antenna by KC9EOT and KB8OJH -
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This homemade tube oscilloscope is based on the WaterMan Pocket-Scope 0510A, a 3 tube oscilloscope made in 1946. -
Displays the actual transmitting beacons of the NCDXF/IARU Beacon Project. -
A New Twist on Portable Multiband HF Dipoles, a Multi-band Spiral Dipole Off-Center-Feed match (OCF) antenna solution. -
Digital Voice Transceiver Project This Project began to explore the use of the DVSI AMBE 2020 voice compression chip and also the ADF7021 single chip VHF RF Transceiver from Analog Devices. -
This article explain how to homebrew and use an HF antenna analyzer by simply adapting a Windows PC, micro-controller and a DDS evaluation board by K6BEZ -
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A combination of Fldigi and Flmsg for portable devices running Android used for NBEMS -
Homebrew a 4 bands parallel fan dipole covering 80,40,20 and 10 meter by VE2XIP -
The digital wattmeter project was created for the purpose of measuring power in the range of 300nw to 30w. -
This article describes how to make a simple receiver Out adapter cable for the Kenwood TS-590S, so a second receiver can be connected and used as a pan-adapter -
A controller for the miniVNA using an Arduino UNO and touch screen color graphic LCD display -
Amateur radio open source log program written in PHP. Put your log online for visitors to browse in real time. Access your log from any web browse, can run under windows linux and macos with apache, mysql and php -
How to build an excellent key for very little cost with homebreweing description and detailed pictures -
Rotator controller, azimuth & elevation control of rotators (automatic antenna turning) based on commands from computer. A project by Pavel VACHAL and OK1DX - KF9VM