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Collection of accessories that makes the Yaesu FT-817 more enjoyable.

Scannist Pages for Upstate NY

Microwaves articles, The Technology Voice of the Wireless World , need registration to access

Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products

Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.

Home Made CW paddles made from a printed circuit board and a teflon mounting block while contacts are made with simple brass threaded rods.

Manufacturer of Select-A-Tenna Products since 1971 AM Radio Antennas

A method of installing a PL259 coax connector, a complete tutorial on how to solder Amphenol 83-1SP connectors

KARSFEST, held at the Will County Fairgrounds. Sponsored by the Kankakee Area Radio Society. Large and well attended hamfest and computer show!

Examines the Icom IC-2100H 2-meter mobile transceiver, detailing its operational characteristics and user experience. The review highlights the clear, easy-to-read display with internal labels, the button-filled microphone's functionality, and the rig's physical construction, including its weighty heat-sink and lack of a cooling fan. It also discusses memory programming, the unique amber-to-green backlight color options, and the radio's performance against _intermodulation_ in urban environments, noting it performs "pretty darn good" compared to other rigs. The analysis delves into a significant low-voltage cutoff problem, where the microphone ceases to function below approximately **12.6 VDC**, rendering the radio receive-only or causing it to stick in transmit. The author describes testing the voltage cutoff, observing it fluctuate from _12.38 VDC_ to 12.69 VDC. An update from Icom involved a "factory update" to the CPU's control code, which is strongly recommended for early-serial number units to prevent operational failure in low-power emergency scenarios.

A large collection of crystal controlled scanners

Analyzing a decade of contest operations and QSLing from March 1993 to March 2003, K5ZD presents data on QSO totals by band and mode, QSL error rates, and DXCC progress. The article details the author's methodology of only answering incoming QSLs, which allowed for a study of call copying error rates, found to be between 0.8% and 1.7%. These error rates correlate with typical contest log checking reports (UBN/LCR). The data also tracks the percentage of QSOs confirmed by QSL cards annually, averaging 12.1% over the ten-year period, with a steady rate of 14-15% in earlier years. Specific statistics include a total of 215,653 QSOs logged, with 26,184 QSLs received. The article identifies the top 33 countries for incoming QSLs, accounting for over 87% of the total, with Japan, Germany, Spain, and Belgium being prominent. It also touches upon the potential of ARRL's Logbook of the World (LoTW) for instant confirmations, while noting potential error rate implications. The author's station, initially a barefoot setup with a Hygain multi-band vertical, evolved into a fully operational contest station by October 1993, utilizing DX4WIN for logging.

SWL QSL card museum with 170+ countries

Most people are not familiar with antenna tuners and what a antenna tuner actually does.

About the Icelandic Alfa Tango members,DX,Iceland and all what has to do with the hobby.

5-element antenna, with which G0JJL has worked lots of EU crossband, and won the RSGB Christmas Cumulatives 70MHz section twice in a row.

Dodgy plans to make Archimedean spiral antenna for RTLSDR software defined radio receiver. Made of two equal lengths of coaxial cable seems to be the easiest circularly polarized antenna to make that will cover a broad range of the rtlsdr dongles E4000 tuners

Activating a county for ham radio can be dangerous to your health!

The largest gathering of shortwave listeners (about 200) in North America, near Philadelphia in March.

G7LRR aerials's that work in small Garden of 20ft x 15ft with a 60ft mast

Reporting program that help you keep track of contacts and take care of the routing activity of creating reports and QSL cards. Require miLog logging program

Demonstrates the construction of a custom programming cable for Yaesu VX-7R and VX-5R handheld transceivers, enabling computer interfacing for memory management and frequency coverage adjustments. The resource details a six-transistor circuit design, powered by the computer's RS232 interface, utilizing readily available and inexpensive discrete components. It includes a complete bill of materials, specifying transistors like the _2N2222_ and _2N3906_, diodes, and resistors, along with a matrix board layout for compact assembly within a 75x50x25mm enclosure. The guide provides practical tips for working with matrix board, such as scoring and snapping, track cleaning, and component soldering order. It outlines the specific connection requirements for both the VX-7R (via Yaesu's CT-91 breakout lead with a 2.5mm stereo jack) and the VX-5R (via CT-44 or a four-section jack), detailing signal and ground pinouts. The author successfully tested three circuits, documenting the one with complete two-way communication, allowing users to program their rigs with software like _VX-7 Commander_ and achieve capabilities beyond commercial cables, including band adjustments.

The European PSK Club, or EPC for short, is an informal club of amateur radio operators dedicated to maintaining high levels of amateur radio communications on PSK modes. Its purpose is to promote activity and good operating practice on the PSK modes on all amateur bands

The Yaesu FT-1000MP Mark-V, introduced at Dayton 2000 Hamvention, features a higher RF power of **200 W PEP** and a Class-A amplification SSB mode at 75 W. Key enhancements include an _Interlocked Digital/Analog Bandwidth Tracking system (IDBT)_, a Variable Front-End Filter (VRF) preselector, and improved ergonomics, notably a multi-function shuttle jog dial. This model, a successor to the 1996 FT-1000 and FT-1000MP, was designed to compete with high-end transceivers, despite its retail price of $4200 initially. The transceiver's physical dimensions are 406 x 135 x 348 mm (16 x 5.3 x 13.7 inches) with a weight of 14 kg (31 lbs), making it substantial. Its rear panel offers over 20 connections, including power, external DSP speaker, BAND DATA I/O, ALC, and multiple interface jacks for DVS-2, Packet, and RTTY. The unit also provides two keyer inputs, a DB9M serial interface for CAT, and two PL female antenna connectors, plus additional receive antenna jacks. Despite its advanced internal architecture, including two independent receivers with their own IF filters and AGC loops, the display technology, utilizing fluorescent discharge rather than LCD, contributes to an older aesthetic. The control panel is extensive, featuring 92 knobs and buttons, alongside numerous LED indicators for various modes and functions.

Article describing how to homebrew a yagi antenna for 50 MHz, includes plans for a four and five elements yagi beam and details how how match impedence with a gamma match

The PAPA Amateur Radio repeaters are located on some of the best hill tops in Southern California!

Personal review of the Yaesu VX-6R handheld transceiver

Design and build custom electronics for clock enthusiasts, Juke Box collectors and the ham radio community. Produces radio interfaces, and radio upgrades.

Protecting the ham radio stations, using a good ground system

HF beacon monitoring. Check world-wide propagation, updated every 15 minutes.

Homemade Loaded Coil Dipole ( w8010 diamond ) for 10, 15, 20, 40 and 80 meter

Home of the Poor Man's Spectrum Analyzer

A New Way to build a 1/4 Wave Ground Plane Antenna

Martin Francis NDB K9AY mast project, with pictures and homebrewing details

Portable SSTV camera that takes a picture and transmit it with ham radio SSTV

The document titled 'Extending the Range of Your Handheld' by WG7S is a guide on how to extend the range of your handheld VHF UHF transceiver by using an external antenna. It provides information on comparing popular models, selecting the right antenna, and resources for amateur radio antennas.

"W2IK's Personal experience being the first responder at ""ground zero"" during the WTC 9/11 disaster."

Amateur radio shop in Barcelona Spain

Building a 1:1 balun, aka un-un, with an Amidon Ferrite toroid core T 200

Global Lightning Technology - Malaysia lightning Malaysia surge protection system

10 meter dx map

W8TTH Welding & Machining , tower plates, side mounts standoffs, house brackets, torque arms.

The Kenwood TS-570D(G) transceiver (I), by Thierry Lombry, ON4SKY

We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Ham radio blog dedicated to military radio equipment by EA3FOW

Only 2x 10ft wide, performance similar to full-size dipole, covers whole band with SWR better than 1:1.2.

The 2 metre fox-or transmitter is a small low power transmitter which mounts in a small plasic pipe and runs off two AA batteries. The board measures just 12mm by 70mm.

This article contains the measurements for building a full wave loop using wire and length of 1/4 Wave Coax Matching Transformer

Digital Signal Processor Kits

Online is a VT100/ANSI terminal emulator and Telnet client for Palm OS organizers. Connect to Unix systems, configure routers and reprogram embedded computers.