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These yagis and groups were designed with YO7.23 from K6STI and checked with EZNEC from W7EL. With a gain of 14/17/20dBd they have a good relation between gain and mechanical problems.

2 meter or Dual Band J-pole bicycle antenna

A gallery collection of funny qsl cards received by PE2PE

Elelement yagi beam antenna for 2 meters band by ON6MU

Descriptions for 144-MHz- , 70 MHz- and 50-MHz-Reflector-Hentennas

Easy circuit that provide good gain to weak audio signals

N5IW ideas to build your own antenna in a restricted lot, or a stealth antenna. Includes PPT files of HF and VHF stealth antennas.

How to build a high gain vertical antenna for the UHF amateur or CB Bands, by radio experimenters handbook

What is hallicrafters? Let these photos illustrate the soul of hallicrafters. by LA5KI

2 Element Cubical Quad Antenna for 28 MHz by DL7JV in german

Tunes symmetric/coax/longwire antenna's between 1.8-50MHz

Several projects which will allow you to build your own RF design test equipment.

One of the best antenna values on the market is the LightningBolt Quad. At about half the cost of a tri-band yagi, you get five band coverage with a single coax feedline and excellent performance from a light, low wind load antenna.

A near-copy of the PIC-E running the GPS-2E firmware

Index of logs hosted on DX.QSL.NET

80m hexfet power amplifier by W7ZOI

3 to 30 Mhz antenna analyzer schematic by YO3DAC / VA3IUL

SerialKey is a Freeware DOS Morse code keyboard that uses the serial port, by Jeff Rowberg (KF6RLU)

Faqs on six meters band, designed to help encourage hams to use and enjoy this band

For amateur radio operators seeking to confirm two-way radio contacts, a QSL card serves as a traditional, tangible verification. ON5UR QSL Printing provides a service for designing and printing high-quality, full-color QSL cards, including options for full-color backsides. The service offers various paper weights, such as 250, 280, 300, and 400 grams, allowing hams to select a card stock that meets their preferences for durability and feel. Pricing structures are detailed for different quantities, with 1000 cards starting at 96.00 Euro for 300-gram stock with gloss laminate, inclusive of design costs. The service includes free QSL cards with larger orders, such as 500 free cards with a 2000-card order, or 500 free cards with a 7000-card order. Shipping costs are categorized into six zones, primarily covering Europe, with specific pricing for countries like Belgium (Zone 1) and a request-based system for other regions and export conditions outside Europe. Testimonials from operators like M0URX highlight the design quality and quick turnaround, which are crucial for DXpedition QSL managers needing efficient processing.

Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.

The DSP Satellite Transceiver is a conceptual transceiver designed as a dedicated unit for amateur satellite operators. The initial concept was brought about by the lack of satellite functionality on modern amateur radio transceivers, and the specialized requirements of the ham radio operator who utilizes OSCAR amateur satellites.

An interface for amplifier to TS-850S

Winding Toroids can be a real hassle for those of use who are left-handed or not so dexterous as we once were.

Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics, IMD, gain data and more. Six articles about amateur radio.

The purpose of this page is to capture and document the Yaesu FT-101 series radios during the 1970's

Iambic keyer with simple paddles and simple electronic circuit.

Amateur radio programs to download, locator , log, etc... for Psion Aprs maps for PC (ui-view)

I4FAF etrode Tube Linear Amplifier experience

Quagi 8el 70cm improved 13.77dBi by IK1HGE

PocketPC freeware that track satellites, and display their position on a map of the world. It also has a display that shows other relevant information useful to Ham Radio operators to allow them to work them.

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.

Ham radio related catoons

VHF, UHF page, technical articles, projects, datasheets

ON6MU Optimized 10 and 6 and 4 element UHF Yagi Antenna

OE1MWW monopole antenna made with common RG 58 or RG 213 coaxial cable

Includes links and documentation on wifi antennas, 2.4 GHz Coffee Can Feed Antennas

This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT

Answers to frequently asked questions for newcomers to the sport of amateur radio contesting.

A 1:1 to 4:1 switchable balun by N1LO

A Versatile Innovative Portable Multi-band Tunable Antenna can work HF VHF and UHF ideal as portable or balcony antenna

RF Choke to prevent hf currents on the feedline. 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.

Modifying the _ICOM IC-706MKII_ transceiver for out-of-band transmit capability involves specific surface-mount device (SMD) removal on the main circuit board. This procedure enables transmit functionality from 0.5 MHz to 200 MHz, excluding the commercial FM-Wide broadcast band, significantly expanding the radio's operational frequency range. The modification requires careful handling of small components and a fine-tipped, low-wattage soldering iron. Prior to beginning, all programmed memories and initial setup configurations must be noted, as the modification process will erase them. The instructions detail the necessary tools, preparation steps, and the precise location of the two SMD diodes to be removed. These diodes are situated near an oblong crystal can and a test point labeled _CP3_ on the main board. Successful completion returns the unit to its default configuration, necessitating manual reprogramming of memory channels and initial settings. This project is suitable for operators with experience in SMD work and fine soldering.

Pictures and circuit diagramm to build this power amplifier for 2 meters

ON6MU optimized 6/9 element vhf yagui antenna with antenna schematic plan and pictures of homebrewed samples.

Clips of DX audio, some dating back to the late 70's to early 80's and up to March 2001

Various tests and designs, with photos of home made EH Antennas,simple and networked, and also sone CAN Antennas.

This VHF 145 MHz antenna is easy to build and with no radials. It shows equal gain of 5/8 lambda. It is light weight, you can hang it somewhere (on a tree may be) and work.

Free program that interfaces most ICOM radios with the ILG radio frequencies database and lets you click a station in the database to tune your radio to the station, or scan the list looking for stations that are on the air.

HF QSO/QSL/Award managment, ADIF Import/Export, full version free to everybody. Requires Access 97 or Access 2000 (with JPEG and TIFF filter installed), screen resolution 800x600/1024x768