balun design

Line Launcher - The line launcher is a handy tool which is a must-have for anyone who uses wire antennas. It provides an easy way to mount the end of a wire antenna up into a tree. It basically consists of a fishing reel mounted to a slingshot, which is a tried & true design.

K5TR'S Antenna Designs - YO files - Antenna designs that K5TR have collected from various sources.

Portable Magnetic Loop Antenna Version 2 - A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres. For its size, the performance of the antenna always astounds me, although it is never going to replace a Yagi

Notes on building Yagis for 50 Mhz - Construction Details for 50MHz-Yagis in DK7ZB-Design

70cm Longyagis - 70cm-Longyagis in 28Ohm-DK7ZB-Design

K5UA 40 meter Phased Array - The intent of this site to share information about the design of a 40 meter horizontal phased array antenna.

Homebrew Balun Case - Balun case construction, tipically to host toroid cores. Size of case depends on power to handle. By DL5DBM

Balun construction  ^pop - PDF files describing how to homebrew a 1:2.5 balun

Build a 4:1 Guanella Balun - Step-By-Step Construction of a 4:1 Current-Type Guanella Balun by W1CG

HF Bazooka antennas - French page with bazooka antenna design information and bazooka calculator

Shortened Center-Fed Half-Wave Dipole - Design your owm HF shiortened dipole

LU9DPD Windom dipole - A multiband windom dipole antenna for 80 40 20 10 meters, feeded with a home made 4:1 balun, in spanish.

Multiband vertical antenna - An article with pictures on a 80-10 mt vertical antenna with an Unbalanced-Unbalanced balun in italian

Quagi antenna for 144 Mhz - A modified W5UN Quagi design optimized for 144.050 Mhz

Receiving Antenna Design - Learn basic theory on antennas, and notes on homebrewing efficient shortwave antennas

KC1XX Contest Station - Amateur Radio Station owned by Matt Strelow. The station is designed for competition in the multi-operator multi-transmitter category of high-frequency DX contests. Running with 7 towers 6 rotators, 8 beverage listening antennas, and 4 spotting verticals

Parabolic Discone antenna - This is the highest gain omni design the world may ever know having wide bandwidth

Tesla and Radio - Nikola Tesla created a basic design for radio

6m technical docuemnts - A collection of scanned diagrams and designs, documents and modifications for 50 Mhz ham radio equipment

WASP-NET - Complex CAD and Optimization Software for Waveguide, Coax, Combline and Antenna components design and antenna modelling

4CX1500 - This is a 4CX1500B grid driven amplifier that is built like a tank. The unit is considerably over designed as can be seen in the pictures documenting the construction

The Approx. Perfect Amplifier manuscript - Discussion of some design features that would be present in a perfect, or near-perfect, amplifier.

Introduction to amplifier design - These tutorials will teach you in very easy steps how to design A class amplifiers.

Band filters by PA9M - Band filters for PA6Z made by PA9M, designed by W3NQN.

9cm transverter - Designed for portable operation, it runs on 12v, and has an OCXO-based local oscillator.