cobra 19 dx

Hybrid Antennas - Antennas that use a combination of vertical and horizontal polarisation.

The Gain of the Axial-Mode Helix Antenna - by Dr. D.T. Emerson, National Radio Astronomy Observatory (NRAO++). Antenna Compendium Volume 4, pp 64-68, 1995, published by the ARRL.

Short Vertical Antennas and Ground Systems  ^pop - This article describes how an effective ground system can be produced for a short vertical antenna.

Projects and Info Center - Antenna projects and info center by KP4AO, including The Optimized Wideband Antenna (OWA) Yagi and Skyhawk, a state-of-the-art trapless tribander

N. American Data Communications Museum - Telephony technology from telegraph to digital transmission

BRASIL-DX International - International Brazilian DX Group

Charly Alpha Dx Group - Spanish web site of Charly Alpha Dx Group (Italy)

TI¤RHU Radio Club Heredia Costa Rica - TI¤RHU Radio Club Heredia Costa Rica with ROMEO HOTEL, DX group.

Surfing my World - Something aboutme where I come from with interested links and about the Charlie Sierra DX-group.

Contest Club Finland - Finnish Club dedicated to contest, with awards and reflector

Mongolia DX Association - Mongolian DX club with a lot of dx info and an online DX newsletter

RA0FF LogSearch Collection - DXers and Contesters logs. Interactive Logs, Log Search, Logbooks collections.

DX & IOTA News Bulletin - Subscribe now to get CB DX & IOTA News bulletin every 2nd week for free.

The Cumberland Valley Amateur Radio Club - Since 1956, the CVARC has been supporting Ham Radio in South Central Pennsylvania.

Grey Line Map - Earth view, with satellite data provided by The Living Earth.

Grey Map - Gray line map in black and white

Optoelectronics - DTMF, RF, decoders receivers and accessories icluding computer interface boards, frequency counters, tone decoders, spectrum sweeper and nearfield receivers

Moon Calendar - Current moon phase and monthly moon calendar

AMSAT Colorado - The Colorado AMSAT Net Page

Monitoring Times  ^updated - Monitoring Times, SWL, BCL, montly reports, Broadcast band, satellite television, long-wave coverage, Reviews of new products and radio-related software.

Universal Radio  ^pop - Online Catalog. All about Radio comms, HF VHF Scanner CB radios, antennas and accessories

British DX club - Information about the BDXC and how to join, including a club-compiled list giving time and frequency details for all English language dx and media programmes

Weather Satellite FAQ - A comprehensive guide to receive Weather Satellites signals in wefax mode

Antenna Visualization - UNIX Application developped at the University of Texas Department of the Computer Sciences, permit to display the radiation pattern and the current magnitude.

GcmWin : Great Circle Map  ^pop - GCM is a freeware great circle map plotting software for windows, you can choose colours, scale, meridians, fields and or squares from the maidenhead locator system.