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About operating the AO-27 satellite

Provide new, used, and rare Gizmos

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

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

Electronic distributor, specializing in capacitors

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

PDF file of the Yaesu FT-991 manual

Slim Jim Antenna projects by N9TAX

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

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.

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

This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.

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.

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

A virtual museum of Collins Radios

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

Brief overview of PSK31 and basic operating techniques.

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

Microcontrollers for many ham radio applications including repeater controllers, beacon transmitters, keyers, antenna switches, battery monitors, etc.

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

Personal web page

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

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

Instructions on how programming a regency scanner model R1060

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.

Home build a Kenwood PG-5A cable. This lead is the audio data cable for some of the Kenwood Mobile transceivers

A few pictures of an homebrew magnetic loop RTX antenna project, working from 30 to 12 meters with excellent results

Qsl card printing, filling, distribution. complete qsl service from Bulgaria

The Buddipole Deluxe, a portable HF/VHF antenna system, receives a practical assessment from IW5EDI after a month of field use. The author, constrained by antenna restrictions, highlights the system's crucial role in enabling portable operations, even managing sporadic digital activity from a balcony. Direct comparisons to a fixed 3-band dipole reveal surprisingly comparable signal reports on 15, 17, and 20 meters, underscoring the Buddipole's effectiveness in real-world scenarios. Tuning the Buddipole proves straightforward on bands down to 20 meters, though the review notes significant challenges with SWR on lower bands like 40 meters, where achieving better than 3:1 SWR was problematic. Observations also include SWR variations with dipole rotation and mast height, suggesting environmental factors play a role. The overall manufacturing quality of the antenna and its accessories, including the tripod and carry bag, is deemed good, despite a minor issue with a pole connector. Looking ahead, the author plans to construct a homemade Buddipole version, possibly optimized for the 30-meter band, specifically for PSK31 operations from an apartment. This personal project reflects a common amateur radio practice of adapting commercial designs for specific needs, further extending the utility of portable antenna concepts.

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

Two Way Radio Batteries, Rechargeable Batteries, Radio Batteries, Battery Chargers, factory direct with lowest prices available!

A 160W linear amplifier for 4 meters band based on GI0GDP

Operates Singapore's largest radio network with 11 FM stations and 3 shortwave stations providing sound entertainment and up-to-the-minute news and information locally and internationally.

A MacOSX antenna design and electronics/electrical tool package. It is a multipourpose application that allow antenna design and comomn calculations

Sunstone Circuits is your easiest source for quoting and ordering printed circuit boards online. We are three respected brands in one: PCBexpress quickturn boards, PCBpro.com full-featured and design-checked boards, and PCB123 design software.

A 2 elements delta loop antenna for 14 MHz with a MMana simulation file, dimensions, pictures of this aluminium tube based delta loop antenna, and matching system details.

Kennedy Safaris, cheap,well organized and ham radio friendly

WA7LAW.COM is a site to support the activities of the Snohomish County Hams Club and for the use by ALL amateur radio operators in and around Snohomish County, club members or not.

Spanish HexBeam antenna manufacturer, produce antennas kits, and part for HexBeam antennas

Using NEC4WIN for Jpole antenna modeling

Operating the _Icom IC-746_ HF/VHF transceiver often presents specific technical questions, and this resource compiles a comprehensive Frequently Asked Questions (FAQ) document in an ASCII text format. It details common inquiries and solutions related to the rig's functionality, accessories, and potential modifications. The content is structured into distinct sections addressing general information, power supplies, antennas, microphones, keyers, amplifiers, TNC integration, and optional IF filters. The FAQ provides practical guidance on topics such as configuring the internal automatic antenna tuning unit (ATU), selecting appropriate power supplies, and understanding microphone pin-outs. It also delves into advanced subjects like computer control via CI-V, wiring for PSK31 operation, and troubleshooting common issues like low S-meter readings on 2m FM or loose tuning shafts. Specific questions cover the installation of optional IF filters, comparing Inrad versus Icom filters, and optimizing filter combinations for various modes. Furthermore, the document outlines various hardware and firmware modifications, including those for increasing monitor volume, replacing LCD driver transistors, and implementing a "poor man's TCXO." It even touches upon untested modifications, such as replacing PIN diodes in the demodulator. The FAQ also lists manual errata and discrepancies, offering a robust knowledge base for IC-746 owners seeking to optimize their station or resolve operational challenges.

A well done introduction to Packet Radio by WB9LOZ

Design, build and supply Military Diesel Operated Tactical generator sets, diesel generator sets, custom generators, auxiliary power units, portable power generators and tactical quiet generators used by the U.S. Navy and Air Force.

Connecting rhythm and language with Morse Code by Phil and David Tulga

The W6NL Moxon Yagi is a high-efficiency two-element 40m Yagi that uses cross elements to provide both loading and Moxon coupling, addressing the challenge of deploying a directional antenna on the 40-meter band. This resource details the transformation of a _Cushcraft XM240_ Yagi into this Moxon configuration, replacing the original loading coil LCA sections with four new assemblies. The guide provides comprehensive instructions for building the boom and elements, including specific dimensions for new sections and tee loading elements, along with detailed drawings and a full parts list for the conversion. Performance data indicates the converted antenna achieves **10.73 dBi** gain at 7.050 MHz with 99.5% efficiency and a high front-to-back ratio. The VSWR bandwidth is over **300 kHz**, ensuring good performance across a significant portion of the 40m band. Construction involves reinforcing element sections, attaching tee loading elements with U-bolts, and implementing element guying using materials like _Phillystran_ to manage sag and maintain structural integrity.

How it's misused and misunderstood, and why it's not useful.

Free programming software for the Yaesu VX-5 and VX-5R

Amateur radio installation services and products for sale. Tower erection services, shack setup, antenna installation

This graphics-intensive program reveals the load on the output of a matching-network, based on measurements of the components in that network. Adjust the network (tuner) for a flat input, measure or look up the network component values and you will immmediately see the R and jX values of the load on the network, presented as both a schematic with the component values and as a Smith Chart normalized to the specified system impedance.