Search results

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.

Quagi 8el 70cm improved 13.77dBi by IK1HGE

Ham radio related catoons

VHF, UHF page, technical articles, projects, datasheets

ON6MU Optimized 10 and 6 and 4 element UHF Yagi Antenna

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

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

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.

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

An RF power amplifier, providing 7 Watts output in HF bands, schematic by ON6MU

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.

Pictures and calculated values for this home made magnetic loop antenna for the 160 meters band by HB9MTN

KC22TX receiving loop antenna for 160 meter band

How to create a simple but effective half wave dipole, illustrated instrucions on how to build wire antennas

Grid Square and Distance calculator by w3km

For two purposes a Cross-Yagi can be useful Satellite work or if you need both vertical and horizontal polarization for terrestrial contacts

Electronic circuit and components layout fot this VHF Preamp

Icom IC-9100 pre release product infomration

Homebrewed jpole antenna for 50 mhz by IW0BZD, include pictures and schematics, in italian.

RF Choke to prevent hf currents on the feedline or...1:1 Choke Balun, sometimes called the "UGLY BALUN"

EI7BA describes a nice selfmade Hexbeam project for a single band version.

A portable dualband dipole robust and compact antenna usable for horizontal and vertical polarisation by ON6MU

This Yagi has a constant element-distance of 1,50 m. You must only correct the lengths of the elements for QSY, see table down. For the bands 10 m and 12 m the Yagi is working as a reflector-radiator-Yagi, for 15 m and 17 m as a beam with radiator and director.

Add some gain over your rubber dummy load with this full size dipole on your HT.

Wideband VHF/UHF/SHF monolithic PreAmp based on MARx-series by ON6MU

Homebrew with CF300 DGMF with about .24 dBD gain

The starting idea was to build a battery charger for Pb battery used in car and moto...

Licensing, cost, practical applications, emergency and personal uses and famous hams.

A novel approach to aerial evaluation with diagrams and graphs by G3CWI

2 meters band VHF dipole with gamma match system

MARS CAP Mod for TS-570

This resource catalogs a significant collection of historical military radio equipment, detailing various sets from World War II and the Cold War eras. It presents information on British, German, Japanese, USA, and other nations' wireless apparatus, including specific models like the _WS-19_, R1155, and WS-18, alongside clandestine spy equipment. The content covers the preservation and restoration of these historical items, with research results published on the site. The site provides dedicated sections for different national origins of equipment, such as "British sets," "German sets," and "North American sets," allowing for focused exploration of specific military communication technologies. It also features specialized pages on topics like the _Enigma machine_, PARASET builds, and historical events such as Arnhem and D-Day, contextualizing the use of these radios in significant military operations. The collection includes detailed descriptions and images of transmitters, receivers, and associated gear. The museum, located in Kidderminster, Worcs, U.K., organizes physical exhibitions and actively seeks new equipment for its collection, emphasizing its role in preserving military radio history.

How to keep from being out of band

20/22 Ampere or 30/32 Ampere 13.8 volts power supply RE-PSF14A20 or PSF14A30 by ON6MU

Article on the HF dual band antenna with construction details and how to add 160 meters to the HF2V

144 and 432 Mhz GS35b High Power Amplifier

ON4VT SSTV and personal page, includes a large software review, introduction for beginners and webcams showing sstv on the net

21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade

A free windows SSTV receiving program specially designed for SWLers. This sstv decoder does not support SSTV TX. Automatic saving of images, based on MMSTV enigne, support multiple sound cards and advanced quality settings. This software is just capable to decode SSTV a good choice if you need to receive slow scan TV.