baofeng uv 200

The Curtain Quad - The Curtain Quad is a broadside array of 7 to more than 200 elements using a very powerful but seldom used method of power distribution

Simple HF Baluns for 50/75 ohm coax - Show diagrams, winding methods and tables of some 1:1 and 4:1 baluns for 1.8 - 30 MHz suitable for use up to 200W (400W peak) on systems using 50 or 75 ohm coaxial cable input where SWR should not exceed 1.6:1.

TowerTalk: CobWebb discussion - Discussion on cobwebb experiences on towertalk mailing list

Home Brew Loading Coil for AD5X Vertical - How to make a loading coil for the AD5X portable vertical antenna

Adding to an Arrow Satellite Antenna - By adding a tripod for mounting, bearing indicators, and a pre-amplifier, you can create an impressive antenna system for picking up FM signals from AO-51.

The humble Yagi or should that be Uda - Article about Yagi-UDA antennas

LZ open contest results - Results of LZ open contest for current and previous years

F5ZUU Beacon - From June 2006 on 28.2415 MHz

TI9 DX-pedition 2008 - Isla del Coco DXpedition TI9K 2008

60 Great Things About Ham Radio - In celebration of CQ magazine’s 60th anniversary in 2005, the CQ staff came up with 60 great things about ham radio, written up by CQ Editor Rich Moseson, W2VU

About Digital Smart Technologies - A general guide to D-STAR. The purpose of D-STAR is to allow HAM Radio operators to speak further and clearer using digital voice while sending data from 1200 BPS on up at the same time.

Icom ID-1 and D-STAR features - 1200MHz Digital Transceiver features and d-star informations from the Icom website

DStar- is anybody else worried about this? - D-Star is being promoted as a new digital voice transmission mode "For the second century of Amateur Radio" - but does it really fit into the spirit of the hobby?

ARRL Experimenting with Icom D-Star Digital System - ARRL has embarked on a project to learn firsthand what D-Star digital technology has to offer and to assess its capabilities in a real-world Amateur Radio environment.

D Star - Vancouver - The idea of this site is to exchange information about the DStar technology.

Low Frequency Transmission Modes - Article by W1TAG on operating modes used on low-banding. The 2200 meter band (135.7 - 137.8 kHz) is only 2.1 kHz wide, so voice work on SSB or AM is out. Find out the best modes on LF

Working AO-51 Calls for Courtesy, Common Sense - AO-51 Operating guidelines and introduction

Portable AO-51 operations - AO-51 satellite LA/PA3GUO/P operations from Norway

The ARS Lab Reviews the Yaseu FT-817 - Yaesu FT-817 ARS review by Russ Carpenter, AA7QU For the ARS Lab

222 MHz Transverter for the FT-817 - As seen in January 2003 QST

Daraz Frequencies - Australian scanning frequencies

SPLAT! for Windows - This free software is useful for visualizing terrain and performing Longley-Rice path loss and coverage prediction using the Irregular Terrain Model. A Windows port of the Linux-based SPLAT by John Magliacane.

WinRad - Winrad is a software program designed to implement a so-called Software Defined Radio (SDR), meant to run under Windows XP, Windows 2000, or Windows 98SE

iLocator for iPhone - A small application for Apple iPhone that calculate grid locator from gps, wifi or gsm cells by IW2BSQ

Interdigital bandpass filter designer - Fill out the form to design a bandpass filter as described in the January 1985 issue of Ham Radio Magazine. These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength