ferrite core

Making a simple current balun - Baluns using ferrite rod and ferrite ring by M0SCG

Low cost 1:1 balun - A balun don't depend on use of ferrite beads, but use steel wool to attenuate any RF on the outer braid

The Guanella 1:4 balun - A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.

T2FD, The Forgotten Antenna - The terminated. tilted, folded dipole T2FD is a little known antenna that performs excellently. Compact in size compared to a half­-wave dipole the T2FD provides signal gain, wide frequency coverage, and exceptionally low noise characteristics.

How to make a Simple Dipole Antenna - It is very easy to create a simple 1/2 wave dipole, all you need is some lengths of wire such as the core of some mains flex or even a straightened out metal coat hanger, some co-ax cable and a connector for your scanners antenna input

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

The K9AY Terminated Loop - A compact directional receiving antenna

Antentop: Loop Antennas - Article on radiation patterns of small loops, equivalent circuits of loop antenna, small loops as receiving antennas, ferrite loops

Hula Hoop Loop antenna - The concept of the "Hula Loop" came after many years of building medium wave loops of varying size, shape and performance. Usually these loops are constructed on a square wooden frame, with wire being wrapped around the periphery

WWVB Loopstick Antenna - A loop antenna for receiving WWVB based on the Amidon R33-050-0750 Ferrite rod.

Ferrite receive antenna - A very compact receive antenna made with ferrite bars by PA0FBK

The Ferrite Rod Antenna - Theory of the ferrite rod antenna

Live Amateur Radio Contest Scores - This website accept live Amateur Radio Contest Scores from contesting logging programs, and produce web output showing the real-time status of participating stations. by W1VE

3830 Score Submittal Forms - Use these forms to submit your major contest scores to the 3830 Reflector in a standardized format that allows N7WA to easily summarize the results.

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

Cleveland Wireless Association - The Cleveland Wireless Association was formed in 1927 during the early years of amateur radio. The club constitution was signed July 1930.

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

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

Mini Ring Core Calculator - The easy way to calculate toroid cores.

Online Calculators for Radio & Electronic Design - Online calculators for toroid coil, air-core coil inductance, XL, XC, and more.

Toroid Winding Calculator - Choose Iron Powder or Ferrite and calculate required turns

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.

Simple anti-static device - With all the wire you have out, you may run into a problem with static buildup on the antennas. This static may try to make its way into your receiver, causing you major problems and damage that can run into a lot of money.