coil design

coil design

Antennas : 20M : 20 meter Vertical Antennas

• The Vertical Buddi Beam for 20m - The Vertical Buddi Beam on 20m using no Coils. n this article I am going to describe a totally new way to construct and use a very old design the two element Yagi antenna. Unlike the traditional Yagi this design does not require a Tower or a boom, it is 100 percent portable and most important high- performance and easy to assemble using standard Buddipole components.
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• Coil calculator - On-line single-layer coil designer
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• Coil Designer - Mk 2 - This page lets you do calculations for single layer air cored coils using the solenoid formula
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• Coil Design - A page dedicated to antenna coil home brewing and coil design by VE6WZ
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• End-Fed Half-Wave Antenna for 20m 40m 80m - How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m. This Shorty 80m EFHW comprises a 49:1 autotransformer (to match the very high impedance at the end of a half-wave wire), a half-wavelength wire for 40m (also a quarter-wavelength for 80m), a loading coil and a short tail wire. The coil and the short tail wire (about 6 feet) make up the other quarter wave on 80m.
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• An automatically tuned 7-30MHz mobile antenna - This is a base-loaded vertical antenna that mounts on the car's roof. The loading coil is designed as a variable inductor, with a three-legged chariot that travels up and down inside the coil, with grooved brass wheels running on the coil turns, and driven by a slotted rotor tube.
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• CoaxTrap - This program let you design of antenna trap using length of coaxial line wound as solenoid on a coil former.
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• The KO6YD Screwdriver Antenna Memory - The Screwdriver Antenna Memory (SAM) product is designed to enhance the mobile antenna commonly called the "Screw Driver". It replaces your current control unit and provides an automated memory feature that eliminates the visual coil tuning method commonly used.
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• CWS Coil Winding Specialist - Manufacturer of transformers, inductors coils and chokes. Custom winding, EMI / RFI Filters, Antenna Windings on ferrite rod, Antenna Winding on phenolic. Any antenna coil designs.
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• Communication Coil - Communication Coil, Inc. designs and produces custom, high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids and Power Magnetics for communications
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• Electronic Products Design - Electronic Products Design Inc based in North Carolina, offers you custom design of transformers, coils, and telemetry control systems.
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• W3FF Antennas Buddipole - The Buddipole is a hi-tech, take-apart dipole designed for HF portable operations. The antenna uses a multi-band adjustable coil for all bands 40m - 2m.
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• HamCalc v1.3  ^{updated  pop} - HamCalc is a free collection of calculators for radio amateurs include Antenna ERP calculations, Attenuators, Audio Filter design, Coil Winding, Decibels, Great Circles map and calculator, HF Filters, HF Traps, Metric conversions OP Amps QRA Locator to Latitude/Longitude, Radio Horizon calculator, Resonance Satellite orbit calculator Timer calculations (555 timer)Zener Diode calculations Download zip By G4VWL
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• Mac Antenna Master - Dipole, Yagi, Vertical, Cubic quad, Log periodic, J-pole, coil, and transmission line design package for the Macintosh
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• Online Calculators for Radio & Electronic Design - Online calculators for toroid coil, air-core coil inductance, XL, XC, and more.
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• Inductor Calculator - Calculate inductance online, with the cylindrical Coil Inductor Design Equations Formulas Calculator
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