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On-line resource that provides practical battery knowledge for engineers, educators, students and battery users alike. The papers address battery chemistries, best battery choices and ways to make your battery last longer.

iOS EchoLink client, this free app will allow licenced ham radio operators to use iPhone, iPad or iPod devices to connect to the echoLink system and connect to repeaters or other echolink users.

The Null-modem emulator is an open source kernel-mode virtual serial port driver for Windows, available freely under GPL license.Allows you to create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another.

Ikeda Shimin (Citizen) Amateur radio Club is the club which consists of Ikeda(JAPAN) citizens.``Sorry...japanese language only.

This retrofit of a GLA-1000 to GI-7B was done by Lawson, W4EMF, in 2002. Modifying The Dentron GLA-1000B for the GI-7B Triode

Amateur, scanner, wi-fi and land mobile antennas and accessories online store

Basic information about learning morse code

a forum for extra class operators to discuss cw, and extra class operation without the usual friction debates.

Penta Laboratories is a Manufacturer and Distributor of vacuum tubes, capacitors and electron tubes for Broadcast, Industrial, Marine and Avionics applications worldwide.

An end-fed-half-wave antenna matcher project based on a FT-82-43 core with a 100 pF and 45 pF capacitor in parallel

A collection of modifications and improvements to the Ameritron ALS-600 ham radio RF power amplifier

Janielectronics RF microwave devices online store

Forum thread about the Yaesu VX-170 at trainorders.com

FTB2070 is a memory management program for the VX-120 and VX-170 FM handhelds

Ham radio Blog, focusing on homebrewing and testing antennas, rig mods and contesting.

A sweep generator that produces a sawtooth waveform which sweeps the oscilloscope beam from left to right via its X input, and simultaneously the VCO frequency.

A project with schematic to build a receiver for 80 meters band by VK1PK

This article describe the principles of baluns when referred to devices used to balance unbalanced systems, like a coax cable and a dipole antenna

An amplifier made using an old HT-41 Hallicrafters Amplifier and adding the 160 meters band By W4NFR

Hone your Morse code skills with this entry-level project. Article includes the full schematic of the CW Trainer, describes the sketch and how to operate the morse code trainer.

Ekins offers an fc preparatory training class for grol and for all commercial licenses, permits and endorsements, including gmdss, stcw and the 70-hour coast-guard approved course.

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.

Solar Power for Your Ham Station, It is Easier Than You Think QST article April 96 by KE0OG via Repeater-Builider.com

Video on Baofeng uv-3r menus

A moxon antenna project by KD6WD

Authoritative group for Kenwood TS-480 operators 1300 users and growing!

Electronic distributor, specializing in capacitors

Meetings Schedule, study groups, circulars from the radio communication division at ITU

About operating the AO-27 satellite

Wiring a Balanced Microphone to the TS-590S Unbalanced Microphone Input

VK Contest Club (VK1CC) is a national organisation for all contest minded hams in Australia

Wondering whether to spend a fine day with the YL or with the antenna? This article may help you decide by W1GV

PL-259, Motorola & N connectors, Coax Seal, universal adapter kit, TNC, Mini-UHF, SMA, F & BNC connectors, audio connectors,antenna mounts and antennas

The 80 metre fox-or/test transmitter is a small low power transmitter which is designed to be used as an alignment aid for running up 80 metre foxhunt or ARDF receivers. It is also usable as a micro transmitter for fox-or-ing events.

The HarRe antenna series, multi element quarter wave resonant broadcaters band receiving antenna

Presents a construction project for a 1:1 current balun, specifically detailing the _Sorbie Balun and Bottle Choke_ design. The resource outlines the winding technique, employing 4+4 turns of mini coaxial cable on a large ferrite core, and provides insights into the physical assembly. It includes specific material recommendations, such as the type of ferrite and coaxial cable, crucial for achieving the desired impedance transformation and common-mode current suppression. The content covers the practical steps involved in building the balun, from preparing the coaxial cable to securing the windings on the ferrite toroid. It also discusses the integration of the balun into an antenna system, emphasizing its role in maintaining pattern integrity and reducing RF interference in the shack. The resource offers a clear, step-by-step approach, making the project accessible for homebrewers. Illustrations and photographs accompany the text, visually guiding the builder through each stage of construction. The article concludes with performance expectations and considerations for deployment, ensuring the constructed balun functions effectively across the intended frequency range.

The copper J-Pole antenna soldered in a couple of hours with an interesting method to setup the feeding point

PDF file of the Yaesu FT-991 manual

The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.

Instructions on how programming a regency scanner model R1060

Personal Blog devoted to ham radio topics, amateur radio issues, social impact of ham radio and opinion.

Open source project offers a solution to remote control of your Amateur radio station. Base for connecting other components and their remote control. The main advantage is low cost and adaptability

A source of knowledge for learning about and understanding antennas. The goal is to present a comprehensive tutorial on antennas.

About DRM, the DRM standard, emission types, upfrading your old HF RX to DRM

Provide new, used, and rare Gizmos

A full superhetrodyne SSB fox hunting receiver kit

A virtual museum of Collins Radios

The idea makes use of a very simple direct conversion receiver on the band of interest.

A well done introduction to Packet Radio by WB9LOZ

Here a comparison of Kenwood TS-590S used with MC-60A and the oringina dynamic microphone