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Our company provides quality QSL printing service for affordable prices.

Amateur Television (ATV) operations, particularly within the Arizona region, require dedicated resources for technical information, operational guidance, and community engagement. This club provides a focal point for hams interested in transmitting and receiving video signals on amateur bands. Members engage in local ATV repeaters, participate in technical discussions, and share knowledge on video modulation schemes, antenna designs, and station configurations. The club supports activities ranging from local simplex contacts to wider area repeater usage, fostering skill development in this specialized mode. The organization maintains a roster of club officers and offers membership opportunities to local amateurs. It also curates offsite links to other ATV resources, expanding the knowledge base available to its members and the broader amateur community. The club's emphasis on ATV helps propagate interest and technical expertise in a mode that combines traditional RF engineering with video technology.

VHF Optimized Yagi Antenna for the 6-meter band (50 Mhz) by ON6MU

These pages are entirely devoted to the Kenwood TS570 series Transceivers. Specifications & Brochure, Pictures, Schematics, Reviews, Manual and Modifications.

Easy to use CW Trainer for Linux. Adaptable for both the Koch and Farnsworth method of learning CW. Makes random tests or can read text from a file

A useful tool to make PCB

Geog is a suite of programs written by Andy Talbot ( G4JNT ), some of which make reference to a database of UK terrain heights, to provide useful information for radio amateurs

3 Band vertical Marconi-antenna for the bands 40, 80, 160 meters with a ground net of wires as radials.

6x2 coaxial remote antenna switch, completed unit showing weatherproof relay box and station control unit.

This article refers mainly to the old Cushcraft 1/4 wavelength AV series of antennas (12AVQ, 14AVQ etc) hence the references to radials. The R series (R5, R7 etc) are 1/2 wavelength antennas, and the radials are NOT 1/4 wavelength resonant.

G3WZT design for a single stage bi-polar 100-150W Linear Power Amplifier for the 6M band.

no tune SSB/CW transceiver for 1296, 2304, 5760 and 10368 MHz

Antennas and homebrew ancilliary equipment

A 5/8 vertical groundplane antenna for 50 mhz

EI5FK tower project

The Contesters Choice

A micro processor interface that converts PC keyboard code into Morse code

Amateur radio club serving NEW YORK area. Club has fully equipped station,holds two hamfests a year,ve exam ,field day and contesting.

Contest adjudication software scores Cabrillo logs. Auto evaluates up to 2000 logs with duping, claimed score, actual score, cross checking, N-QSO rule, 5-min delta QSO rule. Support including code changes, non-scoring logs troubleshoot and summary output requests.

The Thracian Rose Club has been created in the Roses' City Kazanlak (Bulgaria) in 1993. Its main goal is to promote contacts within the radio community members (HAM, CB and SWL).

World's largest collection of amateur radio and broadcast stations' QSL cards and awards

The TU2T DXpedition log provides a critical resource for verifying contacts made during the 2011 operation from _Ivory Coast_. This online tool allows operators to quickly confirm their QSOs, which is essential for QSLing and award applications. Users can typically search by callsign, date, or band to locate specific entries, ensuring accuracy for their personal logbooks. Such online logs are indispensable for DXers pursuing awards like **DXCC**, as they offer immediate confirmation of rare or distant contacts. The ability to verify a QSO without waiting for a physical QSL card significantly streamlines the award application process. This particular log facilitates the confirmation of contacts with the TU2T operation, a highly sought-after entity.

144 Mhz portable 4 elements quand antenna by N1LO

A schematic design of the W3DZZ antenna in portugues with description of trap building

Ham radio software downloads including sstv, logging and morse code

A multi band version of the EH antenna by Emilio S. Campus IS0IEK

The K0RWU 75-meter mobile antenna design features a 7.5-foot overall length, incorporating a 2.5-foot loading coil wound with #20 enamel wire on a 1/2-inch fiberglass rod, subsequently covered with 1/2-inch shrink tubing to increase diameter to 3/4 inch. This configuration achieved resonance at 3965 kHz with a 5-foot stainless steel whip. The antenna integrates a matching transformer, identified by larger turns near the PL259 connector, and is constructed using a modified Radio Shack CB antenna base. Construction involves drilling and epoxying a 1/2-inch fiberglass rod into a PL259 connector, feeding #20 enamel wire through the rod, and winding 17 turns of #18 matching coil wire between the PL259 sleeve and the center feed point. The main loading coil fills the 2.5-foot rod section. The design allows the antenna to bend for garage clearance and emphasizes maintaining a 50-ohm feed impedance to prevent vehicle electrical damage. The author also discusses experiences with a Yaesu ATAS-100 motorized antenna and a 10-meter antenna project, noting issues with auto couplers and the ATAS-100's performance on 17 meters. Future modifications considered include adding a small servo for band spreading and increasing the fiberglass rod length for a 3-foot loading coil to improve bandwidth. The antenna's sharp tuning, between 3960 kHz and 3970 kHz, necessitates careful adjustment of coil turns for optimal VSWR.

QSL extra offers QSL informations for every ardent dxer, with over 30.000 entries.

Two 50 Mhz amplifiers and antenna switch

Collection of world wide radio amateur maps by SP8DA

How to setup a Remote control ham radio station with Yaesu FT-8x7 radios via LAN or via internet.

70cm-Longyagis in 28Ohm-DK7ZB-Design

1.2-30V 1.5A variable regulated power supply

The simple dipole is perhaps the best antenna for consistent performance. Basic page on dipoles by G3PTO

Open source libraries and utilities to support using digital signatures for Amateur radio QSL system information like eqsl and lotw. Available for windows macos e linux.

The largest hamfest in New Englang US

Portuguese page, from VLF to some GHz, antennas, projects, EME, NDB DX and more.

The 2 meters version of the HB9RU antenna in german

How to use packet radio using the WindowsCE operating system

Add Solar-Terrestrial data to your website, by adding a simple html code to your pages by Paul L Herrman

by Don Graham, VK6HK

Presents the detailed construction of the _FLA25HV_ antenna, a specialized array optimized for Earth-Moon-Earth (EME) communications on the 2-meter band. This resource provides schematics and practical insights into building a high-gain antenna system capable of reflecting signals off the lunar surface, a challenging but rewarding aspect of amateur radio. It covers the mechanical and electrical considerations essential for achieving the precise pointing and signal strength required for successful moonbounce contacts, often yielding **20 dB** or more gain. Amateur radio operators pursuing EME operations require robust antenna systems and precise tracking capabilities. The FLA25HV design addresses these needs by focusing on element spacing, impedance matching, and structural integrity to withstand environmental factors while maintaining critical alignment for lunar reflections. Such systems are crucial for making contacts over distances exceeding **768,000 km**. This personal page serves as a practical guide for hams interested in constructing their own EME arrays, offering a glimpse into the technical dedication involved in pushing the boundaries of VHF/UHF propagation.

Information on how to access the IRC #CQDX chat room for DXers. Also contains a live feed of DX spots directly from DX Summit.

Listen to HS0ZER/DL1ZAV radio station from Bangkok, Thailand

VHF/UHF DX site showing latest propagation, software, radio dealers, awards, maps etc.

DF3CB site, contesting, and software BV is a professional freeware software for the QSL Management and Label/QSL Printing under Windows developed and distributed by Bernd Koch, DF3CB, since 1989. It is mainly designed for the contester and QSL manager with high QSL quantities but useful for all other QSL'ing purposes as well. Includes logging features

Details the construction of a **17-meter Moxon Rectangle** antenna, specifically engineered for mounting on a mast beneath an existing beam. The design incorporates insulated wire calculations (0.95804 x generator length) to compensate for velocity factor differences, utilizing readily available materials such as crappie poles for elements, PVC for the boom and mast, and a Budwig HQ-1 dipole connector for the 50 Ohm coax feed. The project outlines a step-by-step assembly process, including mast construction from PVC T-connectors and pipe, element fabrication from crappie poles, and securing elements to prevent droop. Initial testing demonstrated an SWR of 1.3:1 on 17 meters, achieving a 5-8 signal report into Texas with 100 watts. Subsequent reinforcement and elevation of the antenna resulted in a 15 over 9 report from Florida. Comparative testing against an 88-foot center-fed Zepp antenna indicated superior performance, with the Moxon consistently outperforming the Zepp and receiving signals the Zepp could not. A notable DX contact with JA8NFV in Hokkaido, Japan, yielded a 5-9+ signal report both ways using 100 watts.

A small portable antenna tuner for HF and VHF bands by ON6MU

Based on DL6UW Yagi antenna's design-formula The forward gain is 13.6 dBi (about 11.5 dBd) and it's pretty small, about 1,5 m in length

Satellite Tracking/Orbital Prediction Program an open-source, multi-user satellite tracking and orbital prediction program written under the Linux operating system by John A. Magliacane, KD2BD. PREDICT is free software