ferite core

OH7SV Windom baluns - Windom baluns for kilowatt range made with two ferrite toroidal cores amidon ft-140-61 and another schema with two ferrite rods

Balun construction - problems with iron cores - Lots of information and measurements relating to HF baluns and transformers constructed using Iron Powder cores

Transformer for Ground-Independent Receiving Antennas - Transformers theory and calculator of turns on binocular cores. Comparison with toroid cores.

Guanella 1:1 VHF choke balun - A model of a Guanella 1:1 VHF choke balun using a FT140-61 core

A 4:1 Balun  ^pop - A single-core 4:1 current balun of improved performance by Chris Trask N7ZWY PDF file

4:1 balun for 160 to 10 meters  ^pop - Articke By Clay Wynn

Chokes Explained - A "choke" is the common name given to an inductor that is used as a power supply filter element. They are typically gapped iron core units, similar in appearance to a small transformer, but with only two leads exiting the housing

Ham Radio Contest Score Rumors - Contest Score Rumors maintained by N7WA With space graciously donated by Scott Neader, KA9FOX

ARRL Int. DX contest results - International ARRL DX Contest score records, phone recods

Ham Radio Contest Maps - US Contesters maps generated based on ARRL online score data by WM5R

MicroMetal - Manufacture high quality low cost powder cores with a wide selection of shapes

Wire Harness Assemblies - Printed Circuit Board, Custom Overmold Cable Assembly, Box Build, System Integration, Sheet Metal

Balloon or kite antenna? Why not - Balloon antennas, mainly about using 2 balloons instead of one for a vertical antenna.

Chushcraft A3S - Simple Balun Support - A method for supporting a balun on a Chushcraft A3S antenna. This allows the balun to be isolated from the boom, thus reducing the effect of introduction of reaction with the balun core.

DX-Wire - German internet shop for difficult-to-find components, which are used by radio amateurs. Antenna parts, masts and mounts, cables connectors, wires, rf-chockes, toroids cores, twin-lead, teflon -strand, insultators

Universal Score Uploader - A free Windows application which allows you to post ham radio contest scores to getscores.org portal

KC9L PSK - KC9L PSK is a free PSK31 program based on AE4JY’s PSKCore DLL. It supports 5 RX channels, full duplex operation, and more. Even if it's development has been dismissed, is a good tool for windows 95/98 pc.

SvxLink - Echo Link client for Linux and general purpose voice services system for ham radio use. The svxlink server consists of a core that handles the connection to the tranceiver. The core can be configured to act as a repeater controller or to operate on a simplex channel

Antenna Selector - This project was built to be able to experience with more of an antenna and also in turn to be able to have a system that offers security to the receivers, carrying out the discharge to ground of the antennas

Coil Inductance Calculator - Calculate the inductance of a single-layer, air-core coil.

Toroid data - Information on toroids, binocular cores, iron powders, ferrite

Inductor Design Software - RF toroid - A free too designed to assist in the selection of iron and alloy powder cores. RF toroid calculate the location of the Self resonate frequencies for series and shunt inductors.

Tutorial on ferrite balun cores - Toroid cores, ferrite rods a good electrical tutorial on baluns

Winding Toroids - A Guide to safely wind toroidal cores by vu2fd

Ferrite for RFI - Ferrite cores for RFI Suppression