air wound balun

Another Ugly Choke Balun - A home made balun build using a short length of 4 inch drain pipe and 18 foot of RG58 by G4APL

OH7SV Windom baluns - Windom baluns for kilowatt range made with two ferrite toroidal cores amidon ft-140-61 and another schema with two ferrite rods

Low Power 4:1 Balun - Build a Low Power 4:1 Balun , by Charles Greene, W1CG with full-color, full-resolution graphics from the pages of QRP Homebrewer

A 4:1 Balun  ^pop - A single-core 4:1 current balun of improved performance by Chris Trask N7ZWY PDF file

An Improved Multiband Trap Dipole Antenna - This improved multiband trap dipole introduces a new trap design and a change in trap location. The antenna features double-coaxial-cable-wound traps having lower reactance and a higher quality factor (Q) than earlier coax-cable traps by W8NX

W3HH Multiband antenna - A french pdf file that explain how to build a T2FD antenna in all its parts including balun

ZL1BPU Rotator Controller - A very simple controller circuit, with fairly smart performance! The ZL1BPU Rotator Controller has been designed as an add-on unit for the popular Kenpro KR-400 and Yaesu G-400 rotators. The controller consists of a small circuit board which fits inside the rotator control box (see picture).

A stealth HF antenna - A wire antenna matched with a 4:1 balun that can operate with the help of a tuner on all hf bands. By IW2EVK in italian

Camden Antique Radio Service Priority listing - Expert, affordable antique radio repair, all home and auto vacuum tube radios, located just south of Atlanta Georgia

Antique Radio Repair and Restoration - Classic Radio Restorations specialize in professional repair and restoration on all makes and models of antique radios and vintage phonographs. Since 1978.

N1KXR/B Ten-Meter Propagation Beacon - The N1KXR/B went on the air at 21:00 Hours EST on Saturday, November 22, 2008. This beacon is coordinated with the IARU Region 2 HF Beacon Coordinator and is located in Deerfield, Massachusetts USA

SOTA Awards - SUMMITS on the AIR Awards, award programme for radio amateurs

Triple A Amateur Radio Association - An American Radio Relay League affiliated Special Service Club, serving Beaver County, Pennsylvania which is 28 air miles Northwest of Pittsburgh, PA.

Yuma Hamfest & Electronics Expo - Yuma County Fairgrounds, Yuma AZ. On site RV/camping facilities. Seminars, Exams, Tailgating.

GlobalTuners - GlobalTuners provides access to remotely controlled radio receivers over the internet. You can listen to ham radio, shortwave radio, air traffic control, airband, ACARS, airports and much more. Tune remotely controlled receivers from all over the world with your browser and listen live.

Aircraft Spruce and Specialty - Offer Aluminium tubes for antenna parts

Cleveflex - Clevaflex is a manufacturer of flexible wound tubing that can be used in a variety of applications. our unique manufacturing process allows tubes to be designed and built with a multi-ply convoluted wall contour that creates a permanently bonded tube.

Big Hair's Antennas - High Performance, HF, CB, base and mobile antennas

YAESU FL-2100Z Amplifier Repairs - The FL-2100Z amplifier referenced in the following images is the 6-Band model covering 10m thru 160m (no WARC bands) and not the 9-Band version that included the WARC bands. Modifications, schematics and manual

Australian Vintage Radio - STC, AWA, Valve Radio, Airzone, Kriesler, Mullard, Western Electric, dating Australian radios

Ridge Equipment - Sells a broad range of Electronic Test Equipment as well as a full line of Cables, Connectors, Loads and Accessories for commercial or amateur antenna installation and repair.

Ham Club Membership - Ham club membership management software, designed to assist either the secretary, membership chairman, or any one else in a ham radio club to maintain accurate records about it's membership, vital documentation, or club assets by Alpine Software

AA Battery Solar Charger - This almost trivial circuit may be used to charge a pair of AA or AAA sized rechargeable battery cells from sunlight.

500mw CW Transmitter - A very quick and easy way to get on the air is to build a "Michigan Mighty Mite" CW transmitter for 160, 80, 40 or 30 meters. It can't get simpler than this. It has very few parts, costs almost nothing, and it works! Cost estimate $10 by VE6WTF

A single board no tuning 23 cm transverter - This transverter uses bandpass filtering with printed hair-pin filters. By KK7B