microphone pre amp

VK2ABQ Wire Beams - The VK2ABQ wire beam is described in Les Moxon's HF Antennas for all Locations which also contains the original references, but they are rather difficult to find. The VK2ABQ antenna is a planar wire beam that can be constructed from a single hub and four spreaders.

Quarter Wire to Copper Tube Slim-Jim - K0GKJ project of a copper tube slim jim antenna for two meter band

Phone line as a SW antenna - This article describes how to use a phone line as a shortwave receiving antenna, but be carefull telephone lines present a potential shock hazard, use at your own risk

AE7Q Amateur Radio Database Query Tools - Lookup callsign histories & applications, available Amateur Extra callsigns, vanity callsign predictions, and more. Updated from FCC data several times a day.

The Daily DX - The Daily DX is the pre-eminent Internet DX bulletin. You will receive DX news that is instantaneous and unreliant on the US Postal service. Your DX news will be automatically delivered to your home or office by e-mail Monday through Friday, 50 weeks per year. Unlike other bulletins which may take 2-5 days to reach you, The Daily DX news arrives before the information is out-of-date.

Canadian amateur radio clubs - A comprehensive list of Amateur Radio Clubs in Canada

HamPage.com - Amateur radio start page (or "jump page") with categorized links on one screen-size page, making HamPage.com a time-saving default browser page for ham shack computers.

Hampton Police & Fire Dept - Live dispatch audio from the Hampton Police and Fire Department by www.hrconnect.com

Empower RF Systems - We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.

Integrated Tower Systems-ITS - Premier OEM of portable tower systems, Communication-Site-on-Wheels (COWs), heavy-duty fixed foundation telescopic structures commercial and military, worldwide sales and leasing

How to select an amplifier - Thierry LOMBRY, ON4SKY, develops in three long articles all you need to know about amplification, and how to seletc an HF and a solid-state amplifier, with pictures.

MultiKeyer - MultiKeyer is a computer keying program that supports both CW and Phone messages: CW EME Auto mode sends timed CW messages for EME and Meteor Scatter operation CW "Contest" mode sends Auto CQ, plus preprogrammed messages Sequenced Phone mode transmits prerecorded .wav files for Meteor Scatter operation Auto Phone mode transmits prerecorded .wav files for contest operation

Adventures in GPS antenna construction - Adventures in amplified GPS antenna construction; an experiment

Giles SkyWarn - Giles SkyWarn KI4CFK is an ARRL affiliated club dedicated to preparedness in case of severe weather or any emergency which requires emergency communications on 146.775

YagiCAD - A freeware software package for Yagi design. This webpage also contains many sample and standard antenna downloads for experimentation.

World DX Prefixes for Ham Radio eBook - JFile of amateur radio dx prefix list for palm os

RadioLink Propagation Prediction - Calculate path losses of a point-to-point radio link. Create terrain profiles using digital elevation models.

SIGVIEW spectrum analyzer - Complete real time signal analysis software with wide range of powerful FFT spectral analysis tools, statistics functions and comprehensive visualization system.

SP5GJN - HF Power Amplifiers  ^pop - HF home meade power amplifiers by SP5GJN

W7IUV HF Preamplifier - Schematic and pictures of a W7IUV preamplifier

2m Band VHF antenna pre-amplifier - Homebrew pre-amp for 144-146 MHz amateur band and OSCAR Satellites, using BF981 Dual-gate MosFet. Gain ~15 dB, NF=1dB.

VHF UHF preamp - ON6MU project for a vhf uhf preamplifier

6m Preamp - A dead easy 50 mhz preamp by VK3CJS

Garex VHF preamp - It is available for spot frequencies in the range 40 - 250MHz, where a typical gain of 26dB can be achieved

144 MHz preamplifier with BF981 - Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.