3mhz 5mhz 7mhz 9mhz 11mh

137 MHZ QHF Quadrafilar APT Antenna - This version of the 135mHz quadrafilar antenna for APT reception is an adaptation from Bill Sykes and Bob Cobey's article Taming the QFH which appeared in the March 1997 RIG magazine.

7Mhz Vertical antenna  ^pop - The secret with this antenna is to install as many radials as you can around the base of the antenna, they can be anything from 1/8 wave or longer.

An antenna for 7MHz local contacts - This article describes the design of an antenna for local contacts on 7MHz, including a simple and efficient matching system that presents a 50 ohm load to the transceiver.

Short Dipole for 80 Meters  ^pop - May be of interest to anyone wishing to get on 80M (3.5MHz) that have limited space available.

Short 40m dipole - The GM4JMU Shortened 7Mhz Dipole

Antennas by IZ7DJR - Includes EH antennas, 7Mhz vertical monopoles, 5 elements vee log-yagi for 10m and more

Super J-Pole for 435MHz - The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a folded matching stub by vk6ysf

Antennas for HF mobile operation  ^pop - The following description should give you guidance on how to build a mobile antenna for HF bands yourself, using a very cheap CB-mobile whip antenna base. Antennas for mobile operation 7Mhz ,10Mhz, 14Mhz, 18Mhz, 21Mhz, 24Mhz,28-430Mhz

Antenna system in a shopping trolley wally - Multiband portable antenna system edited by Andy Foad G0FTD, consisting of an old cb antenna with it's 27Mhz matching coil, an antenna tuner, car battery and a transceiver

Pedestrian mobile HF antenna - This antenna allow transmission and reception on all bands between 7Mhz and 28 Mhz. Similar in concept to the Miracle Whip by VK3YE

Semi-vertical trap antenna  ^pop - The G3NGD Semi-vertical Trap Antenna for 1,8 3,5 and 7MHz

14CPI080-DT263 Christophe - personal page

27 Mhz CB radio information - Here you can get the information when you are a starter or if you just do not know to much of Cb radio

27MHz DX-Pagina - Dutch web site dedicated to freebanding on 27 mhz.

WJ5O Beacon - TX on 28.289MHz since 1992

Pacific Seafarers Net - The Pacific Seafarer's Net operates from 02:30Z to 04:00Z, 7 days a week, 365 days a year on 14.313MHz and sometimes on 14.300MHz. Between 02:30Z and 03:24Z we perform general traffic handling, and then at 03:25Z the rollcall portion of the Pacific Seafarer's net begins.

PC-Controlled 2m Receiver - This VHF receiver(118-173MHz) is fully controlled by PC(LPT port).Receiver presents a complete dual conversion.

A low power 3.5MHz ARDF transmitter - This low power transmitter is developed for ARDF exercising purposes but of course can be used as super QRP transmitter either. With 1 or 2 meter wire as antenna and a ARDF receiver with ferrite-rod antenna the range is about 100m but with better antennas and a 'real' receiver the range is probably much larger.

Online repeater in Los Angeles - An amateur radio web site serving the notorious 147.435Mhz Repeater in Los Angeles. Listen to the Shoutcast Live Streaming Audio.

49MHz Hobbyists Site - A website and email reflector for hobbyists in the unlicensed 49MHz low-power band.

ATPDEC - Atpdec is an open source program that decodes images transmitted by POES NOAA weather satellite series. These satellites transmit continuously, among other things, medium resolution images of the earth on 137Mhz. These transmissions could be easily received with an inexpensive antenna and dedicated receiver. For more information about receiving POES satellite images consult the rig site.

JA3MHV Amplifiers - 4CX1000A x2 AB1GG Power Amplifier, 21MHz 15W and 3.5/7MHz 20W SSB Transceiver by JA3MHV, 50/144/435MHz 80W Linear Amplifier

Lowpass filter for 5MHz - The following lowpass filter was built using the tables in the arrl manual, it is a 5 section one and seems to work ok

Radio QRP - The Art of Low Power - QRP is The Art of Low Power Radio where the challenge is to operate and/or build AM radio transmitters usinga bare minimum of components, money and construction skill.

40 Meters QRP AM/CW transmitter - VU2VWN project to homebrew a CW for 40 meters band