ferrite core

Coil Designer - Mk 2 - This page lets you do calculations for single layer air cored coils using the solenoid formula

Core Baluns - About core baluns, measurementes, basic theory and calculations

1:6 Balun for the HF bands - 11 wdg bifilar on Amidon T 200-2 Toroid core

Air Cored 1:1 HF BALUN - An air cored 1:1 balun for 3.5 to 30.0 MHz

Balun 1:1 - 1:1 Ruthroff voltage balun using a T200-2 Toroid core

How to Build a UN-UN - Building a 1:1 balun, aka un-un, with an Amidon Ferrite toroid core T 200

4:1 Dual ferrite bead balun - The Dual-Ferrite-Bead 4:1 HF Balun, some preliminary measurements

The Dual-Ferrite-Bead 4:1 HF Balun - A pdf document about the dual ferrite bead 4:1 balun, some preliminary measurements

Balun 4:1 - 4:1 Ruthroff voltage balun design using a T200-2 Toroid core

Ferrite rod antennas - Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.

Ferrite Rod Antenna - Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.

CT1BOH Contest Results - Past results and scores of popular ham radio contests collected by CT1BOH

Pilup.ru - Unofficial Claimed Scores by Valery, R5GA

WY4Y Zebulon Contesting and Awards Club - The primary objective of ZCC is to promote Amateur Radio use by awarding members for achievements in the Awards section. Free membership and awards program. Scores and awards posted on our web site.

Taiyo Yuden - Ceramic capacitors, inductor ferrite products, high frequency dielectric components like chip antenna and filters.

Epcos - Manufacture capacitors, sensors, diodes, varistors, chokes, inductors, ferrites and accessories

Olympix - Performance RFI Filters that work right at the noise sources, ferrite cores.

Cobham Microwave Priority listing - Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.

QRP 1:1 Current-type Balun for Portable Use - A ferrite-loaded coaxial RF choke which just happens to yield the same result as a 1:1 current balun

Sovtube.com - Russian Radio components - Russian Tubes, Capacitors , Resistors , Ferrites Sockets and other components

FerroxCube - Manufacturer of ferrites

EMCoS Anntenna VLab - EMCoS Antenna VLab Student Version edition contains the full-functional MoM based 3D EM solver. It lets to solve task that fits into as big as 2GB memory for incore or out-of-core calculations. Both, 32Bit and 64Bit versions are available.

Coil32 Priority listing - Coil32 is a free coil inductance calculator, that allows to calculate: single layer and multi layer air core coils, toroidal air core coils, inductors on ferrite rings, in pot core, flat coils on the PCB, and also LC resonance parameters. The program have additional plugins to calculate another kinds of coils. The application is free for usage and distributing.

Connectors - There are scores of RF connector types, ranging from the \"cheap and cheerful\" to the extremely expensive types intended for use in professional and military applications.

Ferrite in EMC applications - Electro-magnetic compatibility EMC issues arise when electronic systems interact in an un-desired way