ferite core

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

1:6 Balun for HF - PD2HFE project of a 1:6 Balun for HF Bands using a T-200 toroid core

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

Ferite Balus 1.8 - 30 Mhz - 1:1 and 4:1 baluns diagrams

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 balun project - CVARC 4:1 Balun Project Kit by AE6YC

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

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.

Misek Antenna Research - Publisher of The Beverage Antenna Handbook. Supplier of transformer cores, clips and FET's used in Beverage Antenna construction.

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

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.