lf loop

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lf loop

40 links

Antennas : Loop
  • The K6STI Receiving Loop - This relatively unknown antenna does an amazing job pulling weak low band signals out of man-made noise backgrounds
    [ Hits: 2924 | Votes: 8 | Rating: 7.12 ]
Antennas : Magnetic Loop
  • Remote Loop Tuning - Lyle Koehler's article on remote use of LF loop antennas for receiving purposes.
    [ Hits: 8909 | Votes: 6 | Rating: 4.5 ]
  • GM3MXN Magnetic Loop Antenna - This article describes a loop usable from 7 - 21 mHz, using half inch copper tube 3 feet in circumference
    [ Hits: 2099 | Votes: 1 | Rating: 8 ]
  • Three or four foot box loop - Plans to build a three or four foot box loop for the AM broadcast band, will tune from 530 to 1710 kHz.
    [ Hits: 4137 | Votes: 3 | Rating: 7 ]
  • Active Loop Converter for LF - Active Loop Converter for the LF Band by Lloyd Butler VK5BR originally published in Amateur Radio, July 2000)
    [ Hits: 1839 | Votes: 0 | Rating: 0 ]
  • Thinking about Ideal Loops - Loop antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.
    [ Hits: 2270 | Votes: 6 | Rating: 7.33 ]
  • Magnetic Loop Antenna - Although a magnetic loop antenna(aka small loop antenna) is very compact, its efficiency is close to a half-wavelength dipole if carefully built.
    [ Hits: 1523 | Votes: 1 | Rating: 10 ]
  • Advanced active VLF Loop - Article on using loop antenna in very low frequencies
    [ Hits: 2390 | Votes: 3 | Rating: 7 ]
Antennas : Receiving
  • LF Receiving Loop - A really simple LF receiving loop antenna
    [ Hits: 1018 | Votes: 0 | Rating: 0 ]
  • The Octoloop - An LF/VLF Portable Loop Antenna N4YWK
    [ Hits: 1579 | Votes: 0 | Rating: 0 ]
Antennas : Shortwave
  • Receiving loop for long waves - Cancelling out unwanted noise sources by DL3FP
    [ Hits: 3986 | Votes: 5 | Rating: 5.4 ]
  • An easy loop for VLF - An easy VLF loop, 200Hz-20kHz reception without transformers by Renato Romero and Marco Bruno
    [ Hits: 7461 | Votes: 7 | Rating: 4.86 ]
Antennas : Sloper
  • A half slooper for 160 meters - Italian article includes picturer and plans to homebrew an half-slooper antenna for 160 meters band
    [ Hits: 8495 | Votes: 4 | Rating: 6.75 ]
Antennas : Theory
  • Sensitivity of Multi Turn Receiving Loops - Magnetism is manifested as a 'field of vectors', that is, any point in the magnetic field has not only a magnitude, but a direction in space. The four Maxwell equations describe how electric and magnetic vector fields behave and interact.
    [ Hits: 353 | Votes: 0 | Rating: 0 ]
Antennas : Wire
  • LF/VLF Portable Loop Antenna - The octoloop antenna is a length of 25 pair telephone wire inside an octagonal loop shield of 3/4 hard copper pipe
    [ Hits: 3571 | Votes: 11 | Rating: 5.08 ]
Manufacturers : Antennas : HF : Small & Stealth Antennas
  • Hy Power Antenna Company - Full size or shortened dipoles, Single band or Multi band, Half Square Antennas, Fan Dipole Antennas, Delta Loop Antennas, Antennas completely assembled Loading coil packages, delta loops
    [ Hits: 5451 | Votes: 8 | Rating: 9.13 ]
Manufacturers : Filters
  • Kiwa Electronics - Kiwa Electronics is a company that specializes in accessory equipment for the radio enthusiast. Our products include Filter Modules to improve receiver performance, a High Performance Medium Wave Air Core Loop Antenna for improved broadcast band reception, the Pocket Loop Antenna, the Earth Monitor, BCB Rejection Filter and Broadband and SW Preamps. We also offer numerous performance upgrades for popular receivers.
    [ Hits: 3065 | Votes: 5 | Rating: 8.8 ]
Operating Modes : Longwave
  • 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.
    [ Hits: 3422 | Votes: 5 | Rating: 5.4 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • 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.
    [ Hits: 7905 | Votes: 6 | Rating: 4.5 ]
  • QRM and noise reduction - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
    [ Hits: 5085 | Votes: 6 | Rating: 7 ]

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