Low Frequency radio operations VLF ELF, longwave linksHome : Operating Modes : Longwave
Antenna Noise and Signal Cancelling at LF - By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.
An easy loop for VLF - An easy VLF loop, 200Hz-20kHz reception without transformers by Renato Romero and Marco Bruno
VLF Loop Antenna - A project on building a VLF loop antenna
Longwave Home Page - The World of Radio Below 500 kHz by the Longwave Club of America
Antennas for 136kHz - A very long and exaustive documentation on building antennas for 136 khz. Includes links to antenna design software for longwave
A VLF loop by IK0VVE - This antenna was born from the demand to use a loop for vlf operations in portable posting, avoiding the aid of long wires to stretch.
Long Wave Radio - Dedicated to 136 Khz band by G3YXM includes news, links and software useful for LF working.
VLF-LF And the Loop Aerial - The article discusses the theory of loop aerials for receiving and how they reduce the level of local noise. A Loop Aerial is described suitable for use on the LF and VLF bands together with a circuit of an interface loop tuner and preamplifier. The discussion extends to the problems of amplifier noise and the advantages of tuning the loop.
A LF power amplifier - A Low Frequency (LF) RF Power Amplifier by VK5BR it operates in a linear mode and can handle CW, AM and SSB.
LF MF Antenna Tuner - W5JGV antenna tuner for 150 - 500 Khz band
Introduction to Longwave Radio - A brief introduction to longwave radio
Antennas for MF and LF - Long Waves, Short Antennas, designing antennas for MF and LF communications
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