wide range oscillator

ZMV Spiral antennas - An experimental antenna similar to the TAK spiral antenna was evaluated for SWR response over the frequency range of 7.0 to 7.3 MHz, or the 40-meter band.

Doube Zepp extended antenna - An extended double zepp antenna by F5ZV in french

CQ WW RTTY - Official web site of CQ World Wide RTTY Contest

CQ WW - CQ World Wide DX Contest

HDSCS Hospital Disaster Support Communications System - A group of ham operators in Orange County, California that has supported over 30 hospitals since 1980. Includes information on how hams can provide hospital support in their own areas.

Suburban Amateur Radio Repeater - Suburban amateur radio repeater is a wider coverage machine with six receiver sites in the chicago metropolitan area.

Solarcon Antennas - Solarcon custom designs and manufactures a wide range of standard and specialized antenna products, Patch Antennas, Loop Antennas, Helical Antennas, Yagi Antennas, Slot Antennas, UHF Antennas, VHF Antennas, Bluetooth antennas, Dipole antennas and many more.

Verdant - Designer and manufacture of Airborne Antenna & Radomes covering a range of applications. Products include vhf antenna ,uhf antenna,navigation antenna,comm antenna,blade antenna,vor/ils antenna ,L band antenna, direction finding antenna,DF antenna,vor,ils, IFF antenna on aircraft,aircraft antenna for airborne application.

US Communication antennas - UnderBumper diversity licence plate antenna system (front and rear license plates) become the antennas. Available in VHF, UHF, Dual Band and other frequencies. We also manufacture mobile antennas for HF VHF UHF wideband antennas

marnic.org - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.

Here Comes the Sun - Propagation and Sun - Solar activity can aid or hamper HF propagation beyond line-of-sight range, WA1SVF and N6BV answers to questions about Sun influence on radio signals propagation

IC-7000 Mods - IC-7000 TV Enable Reception, ) TVRO & MARS (US version), TVRO & MARS/CAP Mods by N5AC, IC-7000 RX range expand mod, IC-7000 Tone noise, How to fix the IC-7000 audio noise

Kenwood ts 570 s(g) or Icom 746 (non pro) - KC0WRG post about TS-570 and IC-746

Replacing Kenwood TS50 battery - Forum post about a failing battery on the Kenwood TS-50

Ten-Tec Orion 9 MHz IF Output - This article describe hot extract a wideband 9 MHz IF sample signal from a Ten-Tec Orion model 565 by VE7TK

FT-450 Mars Mods - Mars Mod for Yaesu FT-450 extending frequency range: 1.8-30 MHz

Yaesu VX170 Mod - Extend VX-170 frequency range on Yaesu VX-170

Yaesu VX-8R - Audio Problem Solved - Videos and details on a audio problems of yaesu VX-8R

Yaesu VX-8r Review - Review of the new Yaesu VX-8r

European monitor post - This blog is about utility and military monitoring in the HF/VHF/UHF range.

Medium and Shortwave Listener's Page - DXing listeining mediumwave AM Broadcast Band stations or shortwave radio stations worldwide.

International SWL-Registry - Easily obtain a free and unique International SWL Callsign and, if you wish, be added to the Worldwide Online SWL Directory. Official certificates are also available.

Cluster Client - A windows freeweare dx cluster client, allows you to monitor DX spots from users worldwide by M0PZT

5-band RF Power Amplifier - This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands

QRP AM CW transmitter - A simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator