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30 links about lf system on dxzone.com

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Antennas : 15M
  • 21 mhz half wave GP Antenna - 21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade
    [ Hits: 2069 | Votes: 3 | Rating: 2.00 ]
Antennas : 160M Antennas : Antenna Calculators
  • Online Antenna Calculator - Java script antenna calculators for ground planes, half wave verticals, quad antenna, 5/8th wave vertical antenna, dipole and inverted vee antennas
    [ Hits: 4057 | Votes: 7 | Rating: 6.15 ]
Antennas : End-Fed
  • Feeding an End-Fed Antenna - End-Fed antennas are NOT balanced systems; but neither are verticals, ground planes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.
    [ Hits: 18192 | Votes: 19 | Rating: 7.69 ]
  • End Fed Half Wave Antennas - An interesting article on end fed half wave antennas
    [ Hits: 5440 | Votes: 2 | Rating: 7.00 ]
Antennas : Feed Lines
  • Balanced Self Matching Feed Line System - KE4UYP designed this Balanced Self Matching Feed Line System for people who want the very best feed line they can have on a Monobanded antenna
    [ Hits: 1127 | Votes: 0 | Rating: 0.00 ]
Antennas : Homebrewing Techniques
  • Antenna Gain Comparison System - This device goal is to optimize homebrew antenna for the V/UHF band. This tool, is based itself on the simultaneously comparison between two antenna, directly in dB. by IK0BDO
    [ Hits: 1988 | Votes: 12 | Rating: 5.58 ]
  • Radial System Design - Are the lengths of antenna radials related to the height of a vertical? By N6LF
    [ Hits: 665 | Votes: 1 | Rating: 5.00 ]
Antennas : Portable
  • An End Fed Half Wave Antenna - This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. Being a half wave, no radials or counterpose wires are needed.
    [ Hits: 4023 | Votes: 0 | Rating: 0.00 ]
Antennas : Theory
  • SWL antenna distribution system - A methodology for connecting multiple LF/MF/HF receivers to a single antenna via readily available and inexpensive 75-ohm TV cable. Custom made baluns and splitters provide impedance matching and prevent interaction between receivers.
    [ Hits: 1207 | Votes: 1 | Rating: 8.00 ]
  • Earth Systems - In order to resonate at a particular frequency, an antenna needs to be at least one half wave length long. Antennas below a 1/2 wave are dependent on a ground system for resonance as well.
    [ Hits: 865 | Votes: 1 | Rating: 3.00 ]
  • QEX Ground System Experiments - N6LF series of experiments on ground systems for vertical antennas. That series of reports was converted, with some modifications, into a series fo seven articles in QEX magazine.
    [ Hits: 537 | Votes: 1 | Rating: 8.00 ]
Antennas : Vertical CB Radio : References
  • Citizen Radio Network - An intiative to use unlicensed radio services as alternative communications system during extreme emergencies and disasters.
    [ Hits: 1918 | Votes: 9 | Rating: 6.45 ]
Ham Radio : Clubs : North America : USA : New Jersey Manufacturers : Alternative Power : Solar Panels
  • AltE Store - Providers of solar panels, photovoltaic systems, Solar Cells and Solar Renewable systems and education for the Do-It-Yourselfer
    [ Hits: 537 | Votes: 4 | Rating: 6.00 ]
Manufacturers : Cable and Connectors
  • Response Microwave, Inc. - Microwave Signal Processing Components and Subsystems, from design to manufacturing.
    [ Hits: 215 | Votes: 0 | Rating: 0.00 ]
Manufacturers : Towers and Accessories
  • The One Man Tower - Complete tower system incorporates rotator mount, and lateral support collars. You never have to climb again - and forget the hassle of tilting over to work on large arrays. The "One Man Tower" is the strongest dmall footprint free standing self erecting tower in the world
    [ Hits: 5145 | Votes: 23 | Rating: 9.48 ]
  • AN Wireless Tower Company - AN Wireless is a manufacturer and distributor of Self Supporting Tower Systems for Wireless Communications, Wireless Internet, Wireless Networking, Microwave, Paging, Broadcast, Two-Way Radio and Amateur Radio.
    [ Hits: 1598 | Votes: 3 | Rating: 7.67 ]
Operating Modes : DSP
  • Mfsk - MFSK is an easy-to-use chat mode for real-time amateur contacts, nets and bulletin transmissions, but not intended for contesting or Bulletin Board System (BBS) use. It is a half-duplex non-Automatic Repeat ReQuest (ARQ) forward-error-correcting (FEC) mode. It performs well on long-path fading conditions and in the presence of interference
    [ Hits: 375 | Votes: 0 | Rating: 0.00 ]
Operating Modes : Longwave
  • Antenna Noise and Signal Cancelling at LF - The fact that the phasing between a wanted signal and an unwanted signal can be different on different antennas is put to advantage. With this condition, the unwanted signal can be cancelled out by controlling amplitude and phase. The heart of the system is some form of phase control circuitry.
    [ Hits: 457 | Votes: 0 | Rating: 0.00 ]
Operating Modes : MFSK
  • Mfsk - MFSK is an easy-to-use chat mode for real-time amateur contacts, nets and bulletin transmissions, but not intended for contesting or Bulletin Board System (BBS) use. It is a half-duplex non-Automatic Repeat ReQuest (ARQ) forward-error-correcting (FEC) mode. It performs well on long-path fading conditions and in the presence of interference
    [ Hits: 623 | Votes: 0 | Rating: 0.00 ]
Operating Modes : Stealth Amateur Radio
  • HF Antennas for restricted space - Arrl document about invisible antennas and indoor systems. It is important to consider that few compromise antennas are capable of delivering the performance one can expect from the full-size variety. But the patient and skillful operator can often do as well as some fellows who are equipped with high power and full-size antennas. The "cliff-dweller" may not be able to "bore a hole" in the band as often, and as easily, but DX can be worked successfully when band conditions are suitable.
    [ Hits: 6993 | Votes: 6 | Rating: 4.83 ]
Shopping and Services : Antenna Tower Erectors
  • Antenna Systems & Solutions, Inc. - Antenna Systems & Solutions, Inc. carries antenna mounts, antenna guyed towers, antenna self-supporting towers, four legged towers, BX towers, poles, tower hardware, and wall mounts.
    [ Hits: 537 | Votes: 1 | Rating: 10.00 ]
Technical Reference : Grounding
  • Grounding system - Perhaps one of the most over looked aspects of setting up a listening post is a ground system
    [ Hits: 12159 | Votes: 11 | Rating: 4.18 ]
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