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Countries worked on 6 meters, ZF firsts on 50 Mhz, and links to resources.

Activities, legal infos, technical articles, photos, vendors, software, and links

CB radio club in El Progreso, Yoro, Honduras.

K8qik amateur radio club

QSL information for AX1AA VK1AA/M VK1AA/2 VK1AA/4 VK9LX VK9LX/MM VK9LX/9 H44XX H40XX

Dxpedition information site has dates, frequencies, operators etc. Planning a searchable data base for logs.

The construction principles for open-sleeve elements in antennas

WA1ION article on beverage and ewe antennas

Original article was in December, 1986 QST

Cool QSL - QSL Card printer

K9EID 75W power amplifier for the six meters

Aqui encontraras todo lo relacionado con la radioaficion de Puerto Rico

The ZR6YY Antenna for 6m by Maurius ZR6YY revisited by YT1VP

5 Elements 12,5 Ohm Yagi with a 6m Boom

Lewis County, New York

Corona & Norco in Southern California

A synthesized 2.3 GHz Amateur Television (ATV) transmitter design, conceived by Ian G6TVJ, is presented, targeting broadcast-quality video performance on the 13cm band and extending up to 2.6 GHz. The core of the design utilizes a commercial Z-comm Voltage Controlled Oscillator (VCO) that tunes from 2.2-2.7 GHz, providing a +10 dBm output and simplifying RF alignment. This VCO's stability, originally intended for narrowband applications, readily accepts high-frequency video modulation, contributing to the transmitter's robust performance. The exciter stage, incorporating a Mini Circuits VNA 25 MMIC amplifier, boosts the signal to +16dBm, while a Plessey SP4982 prescaler divides the output frequency for the synthesizer. The synthesizer employs a Motorola MC145151 CMOS parallel IC, favored over the common Plessey SP5060 for its superior video modulation characteristics and ease of programming without microprocessors. This choice addresses issues like LF tilt and distorted field syncs often seen with SP5060 designs, particularly when operating through repeaters or over long distances. The MC145151 divides the signal further, enabling precise frequency stepping, with programming handled by EPROMs for channel selection and LED display. The loop filter network, critical for video integrity, was developed through experimentation to prevent the PLL from reacting to video modulation, ensuring a clean transmitted picture. The transmitter incorporates a Down East Microwave commercial power amplifier module, delivering approximately 1.6W output, driven by the exciter through a 3dB attenuator. Construction involves surface-mount SHF components on micro-strip lines etched onto double-sided fiberglass board, housed within a tinplate box. The design boasts no AC coupling in the video path, preserving low-frequency response, a common failing in other ATV transmitters. Performance tests with a 50Hz square wave revealed no LF distortion, and a calibrated "Pulse & Bar" signal showed a near 100% HF response, demonstrating its capability for high-quality ATV transmissions.

Facilitates logging of amateur radio contacts directly within a web browser, enabling seamless operation across various devices including Windows, macOS, Linux, iOS, and Android. This web-based application stores all log data securely in the cloud, providing accessibility from any internet-connected location. It supports importing existing log data via CSV files, with future plans for _ADIF_ file import, and offers a robust QSL card generation feature, producing print-ready PDF files in standard 148mm x 100mm dimensions. The platform integrates with Japanese government databases to automatically populate callsign-related information such as station location and license issue dates, streamlining data entry. It also assists with JCC/JCG searches for accurate QTH logging. The service leverages SSL encryption for all communications and benefits from security oversight by certified information security professionals. Users can register using email/password or existing Facebook/Google accounts, and the beta version is currently available for free. The system has processed over **5,297,881** logs, with **28,369** logs recorded in the past 24 hours.

Dx-pedition in Lebanon on July 2004 by I1HJT - I1NVU - IK1QBT - OD5LN pictures and Log on-line it's available on web site. Qsl via I1HJT

Radio Society of Sri Lanka

L50W-Special callsign for the 50?anniversary of LU1WP-Radio Club Trelew

Ivo presents a list of LZ Awards and Bulgarian Lighthouses

This RF probe circuit allows RF to be measured in the presence of DC

IK2PII describe here a simple direct conversion receiver, thinked for QRSS and DFCW communications, as companion of ARGO or SPECTRAN programs.

D.I.C. Diploma Isole Campane from Italy

Vasantha VU2VWN VFO controlled 40m Tansmitter schematics

NHRC-2 Based Repeater Controller A perfect controller for a simple repeater or link, or portable/solar powered system.

Design for a quarter wave vertical antenna, for the top band in use at V31YN

This is a computer program for Amateur Radio transmission and reception using a computer and radio transceiver The program equips your computer with a one sentence at a time chat-mode for operation on the HF bands. You use it in the same way as you would Skype or cell-phone TXTing. This facilitates rapid-fire QSOs and especially makes nets easier by ZL2AFP

F2CW-ZL3CW African DXpedition Log Search Page

Interfacing the IC706MKIIG for Soundcard & TNC modes

Fall River Amateur Radio Club

Personal page with photos and info on used equipment

Find QSL managers using various QSL databases

If you like packet radio you will find me there.

The official home page of the Greenland EME DXpedition 29 May - 5 June 2000

EME, MS, Tropo from the island of Corsica

Provide quality QSL design and print by very attractive prices.

Amateur Radio Hobbies of K4MDB

LU Argentina Country CALL division Antarctic and South Atlantic prefixes and sufixes

This 6 meter 2 element yagi antenna is simple, compact and effective antenna for 50 Mhz. The design antenna was optimized with AO for best match to 50 ohms, no matching network. A choke balun is recommended to decouple feedline currents.

Home page della Sezione ARI di Gorizia

BKLog is a versatile log book and contest program designed specifically for amateur radio operators. Developed in VB.NET, it offers a user-friendly interface and a range of features that cater to both casual and competitive hams. Users can log their contacts, manage contest entries, and utilize automatic CW sending, making it a valuable tool for any operator. One of the standout features of BKLog is its integration with DX Cluster access, allowing users to stay updated on DX spots and enhance their operating experience. Additionally, it supports uploads to popular online QSL services such as QRZ, LoTW, and Club Log, streamlining the QSL process for users. With regular updates and improvements, BKLog continues to evolve, ensuring it meets the needs of the amateur radio community. Whether you're a seasoned contester or a newcomer to logging, BKLog provides the essential tools to enhance your ham radio experience. Its compatibility with Windows makes it accessible to a wide range of users, and its ongoing development ensures that it remains relevant in the ever-changing landscape of amateur radio.

Bienvenue sur ma page personnel ! Welcome to my personal web pages !

Dave N9EWO's view's and comments on the Vertex-Standard-Yaesu (V-S-Y) VX-2R also compared to the Icom IC-P7A

Antennas, Transmission Lines, Tuners - Myths, Mysteries and Qualifiers By Don Wilhelm W3FPR

Home page with links ham and more

RF/Microwave Simulator for Puppy Linux by WN2A

This simple project, based on the orginal CobWebb-Antenna model, is about an horizontally polarized, omi-directional antenna for the six meter band.