air core baluns

RF Balun Transformers - This application note is designed to help the reader understand how balun transformers can be used in today’s RF/Microwave communication applications.

Magnetic longwire balun - Magnetic longwire baluns 1:9 combined with ground, a 1:2 and 1:1 balun connections by ON6MU

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

Baluns by Dan N5AR - There is considerable confusion about the various types of baluns, this article try to make it clear.

Les baluns - About different baluns types. Samples and schematics for several ratios baluns in french

Baluns and Transformers - Notes on homebrewing baluns and transformers by G8JNJ

Zenith Transistor Radio Repairs - This site is devoted to the repair of zenith transistor radios

Oren Elliott Products - Variable capacitors - The largest domestic manufacturer ofair-dielectric variable capacitors located in edgerton, ohio.

K7FFF 10M Beacon - K7FFF Beacon on the air at 28.287 MHz

PS8RF/Beacon 24 hours in air - PS8RF beacon tx in 7.035 Mhz with 3 W

SEM soudage - Soldering a desoldering products, SMT repairs, accessories and consumables

Solar Activity and 3-day Predictions - Prepared jointly by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and the U.S. Air Force.

AA4DF's Consumer Electronics Repair - Look for free manuals (download) in amongst paid offerings for test equipment manuals. The freebies page also has mostly ham material. We do also sell major ham collections at pretty much close to our production and distribution costs.

2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM

EB5AGV Kenwood TS-850S repair - TS-850S typical faults and solutions

Live VLF Natural Radio - A collection of VLF natural radio live streams. Where possible, streams are synchronised to provide stereo pairs with baselines of up to 4000 miles.

Bob's Electronics - Bob’s Electronics serve a wide market of customers throughout the Midwes, supports brand names such as Bendix King, ICOM, Relm, Uniden, Antenna Specialist, Antennex, Cushcraft, DB Products, Maxrad, Sinclair, and numerous others.

All-Spec - Products for electronic production service repair and testing

AMP Lady - Authorized factory sales and service center for Emtron. Repair service on all tube type amps HF Vhf Uhf from Palm Bay FL

AirLink Express - AirLink Express is a user friendly digital mode software package for the Amateur Radio Operator. The software is compatible with Microsoft Windows XP and Microsoft Windows Vista. It offers PSK, MFSK and RTTY digital modes with logging and macro capabilities. If you have ever used the Digipan software you will be immediately familiar with Airlink Express. The user interface is almost identical by Alex Krist, KR1ST

FreqLoader: iPhone companion for the mobile ham - FreqLoader is the perfect iPhone/iPod Touch companion for amateur radio operators, monitoring enthusiasts, shortwave listeners and anyone with an interest in the air waves. Whether you're an active licensed ham or an avid scanner listener, FreqLoader will allow you to find what you're looking for, keep track of your stations, maintain complete logs and share your finds with friends, groups and the world.

KENWOOD TL-922 Modifications - Allow 9 bands and 1300 Watt output on the TL-922 amplifier with this document by PA0FRI

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.

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