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Categories
- 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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This free windows application is used for simply triggering PTT via DTR/RTS COM port pins. It supports remote PTT triggering with ptt2dtr as the server. -
40mm diameter grey PVC pipe with a length of 9.5cm -
An Antenna Rotator Project. The rotor design is based on sandwiching the gears and gear supports between two 5/16 inch 6061 T-6 aluminum plates -
This Arduino project decode ICOM CAT frequency information and switch antennas according to preset values. RX and TX antennas can even be different, a project by ON7EQ -
Described here is a simple omnidirectional, vertically-polarised dipole for two metres -
Build a 5 watt, 80 meter QRP CW Transceiver Designed by N1HFX -
HF power amplifier project by YB0AH -
Don't buy or build a semi-vertical trap antenna until you read this article! If you can use a drill, saw and screwdriver this is a simple project. -
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The original purpose was to provide a radio system that could go anywhere, yet be stored easily in a compact space. This project morphed into a portable radio shack to be used for EMCOMM, Field Days or home base station by K7RFH -
The 20m monoband 4-1000 amplifier, by Jelmer (pa5r), Herman (pa0ten) and Frans (pa5ca) -
Beginners making inexpensive, low-power shortwave transceivers from kits. -
This program simulates a HF link, using sound card and WIN95 by Michael Keller, DL6iAK -
6x2 coaxial remote antenna switch, completed unit showing weatherproof relay box and station control unit. -
A short wave regenerative receiver project by Charles Kitchin, N1TEV -
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This antenna allow transmission and reception on all bands between 7Mhz and 28 Mhz. Similar in concept to the Miracle Whip by VK3YE -
A homebrew fishing-rod vertical using a very nice design from EB5EKT. This antenna works 20, 30, and 40M bands by selecting the tap points using alligator clips -
The W6AMT Beacons is a Windows program which automates the collection of radio propagation data. HF data is collected by monitoring the worldwide network of NCDXF / IARU HF beacons. -
A schematic design of the W3DZZ antenna in portugues with description of trap building -
A low-level voltage meter and could even be used for audio purposes. -
Build this simple and cheap 70 MHz Exciter and start to transmit Digital Television by Jean-Francois Fourcadier -
An amateur observatory using a 4 GHz TVRO antenna. -
1.2-30V 1.5A variable regulated power supply -
This simple hack turns your Raspberry Pi into a powerful FM transmitter -
UM58 a regenerative receiver project -
A project to build a cross band repeater using a pair of Baofeng UV5R handheld transceivers. -
Open source libraries and utilities to support using digital signatures for Amateur radio QSL system information like eqsl and lotw. Available for windows macos e linux. -
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The St. Louis Vertical Revisited by Dave Gauding, NF0R here are a few ideas and observations on the St. Louis Vertical -
Signalprocessing for SSB - Direct Conversion Receiver using Phasemethod for Sideband Supression, does all necessary signalprocessing for Direct conversion Receivers using IQ-mixer for demodulation. -
If your local repeater has got you singing the PL tone blues, then read on. For less than $10, an inexpensive PL tone generator can be constructed that will bring new life into that old non-PL rig. -
Local and DX contacts from tight spaces, it works from 40 to 17 meters -
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An inexpensive and easy to build Quad antenna project edited by AA1PG -
Circuit diagrams to homebrew different baluns by vk2awx -
An active antenna amplifier schematic works from 1 to 30 Mhz -
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80 metre ceramic resonator VXO CW Transmitter by VK1PK -
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Yet another G5RV antenna plan to build a G5RV Antenna for 80 to 10 meters usage -
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Excellent poster representing the electromagnetic spectrum from 31.2 mHz to 6.52 EHz, PDF file poster designed by Anthony Tekatch -
Remotely controlled antenna switch that can switch between 5 antennas -
A pdf file with schematics of an ssb and cw filter AF amplifier -
Build An Offset Attenuator by Joe Moell K0OV as featured in Homing In for May 1998 -
A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency. -
Spek helps to analyse your audio files by showing their spectrogram. Spek supports all popular lossy and lossless audio file formats. Spek is free software available for Unix, Windows and Mac OS X. -
This vertical antenna consist of a 18 meters telescopic pole and allow operations from 160 to 30 meters band, project by Daniel Zimmerman N3OX
