50 ohm attenuator

WARC 3 band dipole - A dipole antenna for 12 17 and 30 meters band

The zeppelin antenna for 50 Mhz - A end fed antenna used on the big zeppelin airships (thus the name ZEPPELIN antenna) of the 1930's where the wire trailed behind the dirigible.

50 Mhz J-pole antenna - A project for a jpole antenna for the six meters band. Includes dimensions building instructions and pictures of the assemblig phases. In Italian

X-Beam for 6m 2m and 70cm - X-Beam antenna by K0EMT for 50 Mhz and VHF UHF bands

Dipole Calculation - Determining your proper length for the open half-wave dipole antenna

Loop antenna for NDBs - Nondirectional Radio Beacons, NDBs, can easily by received with this loop. Resonant in the 200 – 500kHz range, the loop antenna is directional, sensitive, and quiet.

Handheld Yagi - This is the handheld yagi can be used for working satellites when mobile. Offer 420 - 450 MHz 70cm bandwidth and the worst SWR is 1.3:1

WWVB Loopstick Antenna - A loop antenna for receiving WWVB based on the Amidon R33-050-0750 Ferrite rod.

Magnetic antenna fo ULF - Detection and recording of Schumann resonances and other electromagnetic phenomena at frequencies below 50 Hz By Hans Michlmayr

Wire receiving loop antenna - A quick and easy to build loop antenna for shortwave listeining can tune from 5 to 18 Mhz

LF MF Antenna Tuner - W5JGV antenna tuner for 150 - 500 Khz band

6 Element Yagi for 432 Mhz  ^updated - U6YRN 6 element yagi antenna for 430-450 Mhz in spanish

OZ7CQ - The CQ Contest & DX Group, main activities is - participating in contests. Mainly in the Nordic Activity Contest at the 50 MHz, 144 MHz and 432 MHz, though the group holds a full licence, have we not participated in a HF contest yet.

S50G Contest station

Contest University - After a year of preparation, 150 students and 11 professors participated in 10 hours of intense Contesting instruction covering some 22 topics, with over 400 pages of text

A71A/B - 50,006.0 MHz from LL55SH by Qatar Amateur Radio Society

WD2XSH The 500 KC Amateur Radio Experimental Group - The ARRL 600 meter experimental group

KN2MET NYC Metro - NYC METRO is a not for profit 501(c)(3) publicly supported organization, supporting the Amateur Radio Communities Emergency Services.

Ham Radio Cartoons - Some funny amateur radio cartoons

Web and ATV Camera Frauenstaffel - Webcameras, Frauenstaffel - Waidhofen - Austria, ATV-Webcam on a 150feet high radiotower.

VHF/UHF Propagation - In the past few years there has been a growing movement from VHF frequencies (50-300 MHz) to UHF (300-900 MHz). Many, however, have found the move fraught with difficulties.

Offset Attenuator for Radio Direction Finding - Instead of acting directly on the incoming signal, an offset attenuator works by adjusting the strength of an offset signal

Active attenuator - This active attenuator works as a simple mixer by WB2HOL

Simple adjustable passive attenuator - This adjustable passive attenuator works as a "waveguide beyond cutoff." It can be constructed in about ten minutes from parts available locally.

Small Unregulated Power Supply Project - Here's a simple power supply that can be used in many applications. It is not regulated , so keep that in mind for voltage sensitive devices , and of course you will need to understand how to select the correct amperage and voltage for the AC transformer.