balun design

Antenna Baluns: What they are - Baluns what do they do, in a pdf file by W7EL

Balun and Transformer Core Selection - Occasionally errors are made regarding core selection. This especially includes baluns, where on occasion some very strange ideas surface.

Transmitting Baluns - One of the most popular Ham-lore rumors is a balun's performance can be tested or evaluated by grabbing the coax and watching for an SWR change. This is probably one of the worse test-rumors circulating

RF in shack with vertical and longwire antennas - Why a vertical antenna or longwire antenna might require a balun

A better antenna-tuner balun  ^pop - Which balun to use? The hybrid balun promises advantages over both voltage and current baluns by ZS1AN

WB6ZQZ 3 in 1 Balun - Builing a triple ration balun, that match resonant antennas from 9 ohms to 75 ohms with 1.5:1 or less SWR

Installing a balun - The correct way to install a lowngwire antenna with a balun

Longwire Antenna Balun Project  ^pop - Home brew a long wire balun

Baluns in theory - A complete reference on building baluns

The 9:1 balun  ^pop - Antenna special on hard-core-dx.com

Balun Information - Baluns for HF application resource page

Balun compilation - Collection of many home made baluns

W1CG Low Power Balun Kit - Contruction manual to build a 4:1 balun, it has good performance from 160 through 10 meters.

Balun single core 4:1 analysis - Real 4:1 Transmission Line Balun with Balanced Load

Choke balun  ^pop - Essentially, a choke balun is designed to 'divorce' your antenna from the feed line. if your feed line is coaxial cable then you don't want it to be part of your antenna. you want to be able to deliver all your power to the radiator itself, i.e. 'the antenna'. a choke balun does this admirably

EA6VQ - Open wire feeding and baluns - Discussion about open wire feeding and baluns took place in the Moon-Net reflector.

HF Mobile Antenna HB9ABX - Most efficient hf mobile antenna, This mobile antenna is designed for all HF bands from 10 to 80 meters an proved to be very efficient in my travels in South America on 15 and 20m for contacts to Europe and within South America.

Crank-up Tilt-over Tower  ^pop - A home made tower, with project design and pictures

2.4GHz Cubic Quad Antenna  ^pop - The Cubic Quad antenna is a commonly homemade antenna in the range of about 150 odd MHz. Our little project was to design one of these for use in the 2.4GHz range for 802.11 wireless LANs.

CWS ByteMark - CWS ByteMark's Baluns (Balanced to Unbalanced) and Ununs (unbalanced to unbalanced) transformers are developed jointly with Dr. Jerry Sevick, W2FMI, who is known worldwide for his work on transmission line transformers

F5VLB amateur radio astronomy station Priority listing - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.

Technical resources for design engineers using batteries and power supplies. - Resources for custom battery chargers and power supplies from powerstream

Avoid pitfalls when recharging batteries to ensure long life - Portable design - avoid pitfalls when recharging batteries to ensure long life - secondary batteries can be simple devices, but improper charging can be devastating to the user experience.

Winding style of toroid chokes and baluns - Dispels myth about choke balun winding method

Common-Mode Noise - Receiving Common Mode Noise shows how lack of a balun can contribute to system noise