cap antenna

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cap antenna

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Antennas : 40M : 40 meter Magnetic Loop Antennas
  • 40m Magnetic Loop Antenna - A coaxial cable tuneable magnetic loop antenna for 7MHz. This experimental antenna does not require a tuning capacitor
    [ Hits: 3584 | Votes: 4 | Rating: 8.75 ]
Antennas : End-Fed
  • Multiband End-Fed Antenna - A homebrew project for a multiband end-fed antenna made with a single FT140-43 and 50pf capacitor and 20 meters of wire.
    [ Hits: 3435 | Votes: 8 | Rating: 6.12 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • Yet Another EFHW Matcher - An end-fed-half-wave antenna matcher project based on a FT-82-43 core with a 100 pF and 45 pF capacitor in parallel
    [ Hits: 696 | Votes: 3 | Rating: 9 ]
  • End-Fed HalfWave Matching Unit for SOTA operations - An end-fed half wave antenna matching unit made of 3:24 turns ratio on a FT140-43 toroid with a 150pF capacitor across the input.
    [ Hits: 259 | Votes: 0 | Rating: 0 ]
Antennas : Magnetic Loop
  • Magnetic Loop Antenna Project - River City Amateur Radio Communications Society magnetic loop antenna project, design an capacitor homebrewing
    [ Hits: 914 | Votes: 2 | Rating: 2.5 ]
  • Coca Cola Loop Antenna - The Coke Loop is a Small Magnetic Loop Antenna tuned by a trombone-style variable capacitor made with standard soda cans
    [ Hits: 2644 | Votes: 9 | Rating: 6.33 ]
  • 30-10 Meter Loop - An home made magnetic loop antenna project using a military surplus 150pf capacitor by KF5CZO
    [ Hits: 1101 | Votes: 0 | Rating: 0 ]
  • Simple Coax Mag Loop Antenna - A homemade Magnetic Loop antenna from a spare 3m length of RG213 working from 30m to 15m with a 130pF tuning capacitor
    [ Hits: 3995 | Votes: 11 | Rating: 7.18 ]
  • Home made High Power Magnetic Loop Antennas - Magnetic Loop Antennas for The Radio Operator with Limited Space, a two part series of articles on how to construct a magnetic loop antenna, including directions on selecting high voltage tuning capacitor
    [ Hits: 896 | Votes: 0 | Rating: 0 ]
  • Magnetic Loop Antennas  updated - A complete guide to magnetic loop antenna construction, with analysis of multi-turn and single-turn magneti loops, and and insight on choosing the optimal capacitor, or homebrewing your own butterfly capacitor
    [ Hits: 1251 | Votes: 1 | Rating: 10 ]
Antennas : Theory
  • Designing Vertical Aerials - If you want to design vertical antennas you can find all theory and formulas used to model a vertical aerial calculating capacitance, reactance, building the inductor and calculating resistances. Includes an excel spreadsheet to calculate efficiency.
    [ Hits: 576 | Votes: 0 | Rating: 0 ]
Antennas : Towers
  • Antenna Safety - Elevated Work Platforms - Accessing antennas at great height poses many potential safety hazards. Essentially, climbing ladders or scaling towers, regardless of whether or not a commercial safety harness is fitted, is risky business indeed particularly for those hobbyists in their latter years or not as physically capable as others.
    [ Hits: 287 | Votes: 0 | Rating: 0 ]
Antennas : Tuners
  • QRP Z-Match Tuner 40-10m - The Z Match is really a basic L Match consisting of a series capcitor and variable shunt inductor, coupled to the antenna using the RF transformer action.
    [ Hits: 1799 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • G8JNJ Broadband HF Vertical Antenna - Broadband HF Vertical antenna which does not require a tuner, and which is capable of providing reasonable performance on all bands from 7MHz to 28MHz
    [ Hits: 1449 | Votes: 1 | Rating: 10 ]
Manufacturers : Antenna Tuners
  • HA8DU Antenna Tuners - HA8DU European manufacturer of quality amateur radio antenna tuners for HF Bands, from 10 meter to 160 meters band. Products includes manual and automatic antenna tuners, power handling till 3.5 KW. HA8DU produce even custom made variable capacitors and rotary switches.
    [ Hits: 396 | Votes: 4 | Rating: 7.5 ]
Manufacturers : Antennas : VHF UHF Microwave : Vertical Antennas
  • James Pole Antenna - Hand-tuned, J-Pole Antennas. The James Pole Antenna is constructed of 1/2 inch Type M copper pipe, soldered together and capped on both vertical elements. Each Antenna is tuned for center frequency.
    [ Hits: 218 | Votes: 0 | Rating: 0 ]
Software : Antenna rotor control
  • Moontracker - A moon tracking software capable to drive the rotation of your antennas in azimuth and elevation
    [ Hits: 951 | Votes: 1 | Rating: 6 ]
Technical Reference : Antenna Switch
  • CI-V based remote antenna switch - An home made remote antenna switch project capable to read the current working frequency from the radio and to change antenna accordingly
    [ Hits: 488 | Votes: 0 | Rating: 0 ]
Technical Reference : Arduino
  • AutoCap Tuner for mag loop Antennas - This article describes a loop tuning system that automatically keeps a contest-band loops properly adjusted as operator hop around each band, made with Arduino
    [ Hits: 894 | Votes: 2 | Rating: 6 ]
Technical Reference : SWR Meters
  • Serial/USB SWR Meter - A low-cost SWR meter project based on Arduino that works with AutoCap automatic antenna tuner for magnetic loop antennas
    [ Hits: 780 | Votes: 2 | Rating: 5.5 ]

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