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The Gain of an Endfire Array - This article looks at the maximum theoretically possible directive gain that could be obtained with an endfire array of given length or number of elements, and compares this with practical results in the literature.

Magnetic longwire balun - Magnetic longwire baluns 1:9 combined with ground, a 1:2 and 1:1 balun connections by ON6MU

QRP Magnetic longwire balun with VHF-splitter - This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

Balun for folded dipoles - A 1:4 balun suitable for folded dipole antennas

VHF/UHF Wideband Portable Dipole - A portable dualband dipole robust and compact antenna usable for horizontal and vertical polarisation by ON6MU

Antenna Tower costs - The costs to implement the N3RR Dream Tower

Icom AH-4 wide range antenna tuner - This document attempts to compensate for a rather sparse instruction manual by providing information on how to interface the AH-4 with any HF radio.

HF VHF mini antenna tuner - A small antenna tuner project that cover from 3 to 150 Mhz with a max power of 50 watts by ON6MU

Famous Hams and ex-Hams - The original famous hams and ex-Hams list by N2GJ and W2SG

Famous Hams : Rumors and mistakes - Rumors and mistaken identities at the original famous hams and ex-Hams list

WebSDR on 20m, 40m and 80m  ^{updated  pop} - On this page you can listen to and control a short-wave receiver located at the amateur radio club ETGD at the University of Twente. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio

Allocation of Radio Spectrum - This is the table of contents to a list showing how the radio frequency spectrum is allocated to different users in the United States.

Kansas City D-STAR Information Priority listing - Kansas City DStar Users Group

HELLoIP - CWirc Hellschreiber extension - HELLoIP is a CWirc extension to do Hellschreiber over the internet, using gMFSK

Radio Frequency Beacon Finder - This project is a radio frequency receiver that will help the user the trace the direction and distance of transmitter beacon(s) operating at 433MHz frequency by Cornell Univerity

Yaesu VX-2R technical supplement - The Yaesu VX-2R technical supplement manual delivered by radioamateur.eu in a 44 page pdf file

Yaesu VX-2R Manual - Operating Manual for Yaesu VX-2R pdf file size is 1417 KB

Kenwood TH-F6A TH-F7E Manual - The english version of the TH-F6A or TH-F7E VHF UHF handheld transceiver manual in pdf format

5 Amp power supply for portable usage - A 13,8v/5Amp 78H05 based power supply for portable use. In this example used to power up a Yaesu FT-817

South Australia Scanner & Radio Users Forum - The Discussion Forum for Scanner and Radio users in south Australia.

Amplifier for 15 and 17 meter band - The two linear amplifiers are ment for use with QRP SSB/CW/FM/AM transmitters on the amateur bands 15 and 17 meters can be powered from a 12 volt DC supply by ON6MU

Low Pass Filter Construction - Low Pass Filter Module Construction Manual

Bluetooth Audio and Amateur Radio - Bluetooth headsets are very common with cell phone users. As such, many amateurs may already own a Bluetooth (BT) headset. So why not use it with amateur radio?

Multi-functional Power Supplies - Two types of multi-functional Home-brew 6/8Amps - 20 Ampere variable power supplies by ON6MU

12/20 Ampere power supplies - Two types of home-brewed 12/20 Ampere 13,8volt power supplies, including detailed part lists by ON6MU