trap 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

Six Meter Wavelength Band Antennas - Why 6 meter hams design the best antennas

80-10 Meters Doublets antennas - All band doublet antenna based on NB6Zep's design and an 88 foot flatop version

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

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

To Trap or Not to Trap - An interesting article on traps, pros and cons of trapping by W4RNL

The J-pole Antenna Revisited Yet Again - The dynamics of antenna design

Loop Antenna Design - Full-wave loops are very popular antennas. They are especially useful on 80 and 40 meters where they perform well at modest heights

An automatically tuned 7-30MHz mobile antenna - This is a base-loaded vertical antenna that mounts on the car's roof. The loading coil is designed as a variable inductor, with a three-legged chariot that travels up and down inside the coil, with grooved brass wheels running on the coil turns, and driven by a slotted rotor tube.

About trap antennas - Negatives sides of using trap antennas

Easy way antenna systems - Written by John M. Haerle, WB5IIR (SK). A must read for anyone considering building a good low cost HF multi-band antenna system.

CSVHFS Antenna Gain Measurements - The Central States VHF Society has conducted Antenna Gain Measurements since its inception in 1967. Comparisons between commercial and homebrew antennas, between different homebrew designs, and between different commercial designs. Mostly VHF UHF and up antennas.

Coaxial Traps for multiband antennas - A new perspective on the analysis and design of this popular antenna element. By Karl-Otto Müller, DG1MFT

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

High Performance Wire Antennas - Popularity doesn't guarantee high antenna performance, disadvantages of trap antennas

Tennamast - Tennamast design and manufacture a wide range of fabricated metal goods, Antenna masts, Wind-sock masts, and masts for holding such systems as CCTV, Loudspeakers, Lighting units

Tarheel Antennas - Our motorized antennas and stainless steel mounts are designed with the most avid HAM radio operator in mind, as well as commercial applications. They are made with the best materials and top of the line workmanship. Antenna mounts

Communication Concepts, Inc. - Provide components to the amateur who wants to construct their own gear and to the professional who wants to save money and time in prototyping their circuit design, Filters, HF Amplifiers, Splitter Combiners, VHF Amplifiers, ATV

NETCERTUS ampsequencer - Advanced microprocessor driven control board specifically designed to buffer CW key signals while switching the amplifier to transmission, it can also be used to provide proper TX delay timing for RTTY.

microHAM - Supply high quality accessories for your ham shack, including Band Decoders, various types of Antenna Switches, Antenna Stacking devices, special devices designed for the SO2R operator, USB Interfaces, Digital Mode Interfaces, Keyers and many others

Tashjian Towers - Towers by Tashjian, Engineering, Design and Manufacturing

The ROSE 80 CW Transceiver - Build a 5 watt, 80 meter QRP CW Transceiver Designed by N1HFX

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