auto antenna

69 links

Advanced Antenna Modeling Book by ON5AU - A new book about modeling antennas with EZNEC and in particular in conjunction with the AutoEZ application for a total of 584 pages. The book include more than 3000 accompanied downloadable EZNEC model files
[ Hits: 451 | Votes: 9 | Rating: 6.23 ]

Slim Jim Antenna Calculator by M0NWK - Easy to use online Slim Jim antenna calculator. Input your frequency to automatically calculate the lengths of the different antenna parts.
[ Hits: 189 | Votes: 4 | Rating: 8.5 ]

EFHW autotransformer comparison - Two different ways to create autotransformer for end fed half wave wire antennas, by using ferrite or air core.
[ Hits: 526 | Votes: 3 | Rating: 2 ]
End Fed Antenna with a 1:64 Matching Network - In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet
[ Hits: 872 | Votes: 15 | Rating: 6.73 ]
End-Fed Half-Wave Antenna for 20m 40m 80m - How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m. This Shorty 80m EFHW comprises a 49:1 autotransformer (to match the very high impedance at the end of a half-wave wire), a half-wavelength wire for 40m (also a quarter-wavelength for 80m), a loading coil and a short tail wire. The coil and the short tail wire (about 6 feet) make up the other quarter wave on 80m.
[ Hits: 141 | Votes: 1 | Rating: 4 ]

An automatically tuned 7 to 30 MHz mobile antenna - For every radio amateur who loves to travel by car, a mobile installation soon becomes a necessity. While in inhabited areas there is usually some coverage of VHF repeaters, in many other places VHF radios are useless. In these very places, HF can provide reliable contacts, and a lot of fun, from anywhere.
[ Hits: 260 | Votes: 1 | Rating: 10 ]

A simple Attic Antenna for HF bands - This simple antenna was installed on the attic. Antenna was matched with help an Automatic ATU in 40, 30, 20, 17, 15, 12 and 10 meter amateur Bands. The Antenna worked satisfactory on the above mentioned bands.
[ Hits: 317 | Votes: 7 | Rating: 6 ]

An Automatic Antenna Tuner - An homemade antenna tuner project that should be small, easy to build and cheap. This automatic antenna tuner can work as locale or as remote. The tuner has EEPROM memory for store settings for faster tunning and four interfaces
[ Hits: 493 | Votes: 3 | Rating: 9 ]
Semi-automatic antenna tuner project - Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
[ Hits: 291 | Votes: 0 | Rating: 0 ]

HA8DU Antenna Tuners - HA8DU European manufacturer of quality amateur radio antenna tuners for HF Bands, from 10 meter to 160 meters band. Products includes manual and automatic antenna tuners, power handling till 3.5 KW. HA8DU produce even custom made variable capacitors and rotary switches.
[ Hits: 399 | Votes: 4 | Rating: 7.5 ]

LDG Z100 Autotuner - Review of the LDG autotuner model Z100 a simple to use and operate amateur radio antenna tuner
[ Hits: 373 | Votes: 1 | Rating: 10 ]

FT-817 Cheat Sheet - A simplified operating guide for the Yaesu FT-817
[ Hits: 158 | Votes: 0 | Rating: 0 ]

AutoEZ - Automated use of EZNEC. AutoEZ is an Excel application that works in conjunction with the EZNEC antenna modeling programs and allows you to use variables to control diverse aspects of the model. You can then run multiple EZNEC test cases while AutoEZ automatically changes one or more variables between runs. Commercial version and free demo available for download.
[ Hits: 515 | Votes: 1 | Rating: 7 ]

Autonomous Satellite Tracker - This two-axis tracker tracks satellites with high accuracy entirely by reference to built-in spatial sensors in conjunction with a 9-DOF (degrees of freedom) sensor attached to the antenna boom and a GPS receiver.
[ Hits: 1716 | Votes: 6 | Rating: 8.5 ]
Mini Satellite-Antenna Rotator Mk1 - This project is a portable device used to automatically point a directional antenna towards an orbiting satellite. It takes all the effort out of little kids holding the antenna and figuring out where to point it. It allows students to talk through Amateur Radio satellites or download weather satellite images.
[ Hits: 552 | Votes: 0 | Rating: 0 ]

Building a SainSmart USB Antenna Switch - Building an automatic 8ch USB Relay switch using an existing Ameritron RCS-8V Remote Control Coax Switch and an externally mounted 5-way switch.
[ Hits: 155 | Votes: 0 | Rating: 0 ]
Automatic Arduino Antenna Switch - A Programming-Free Automatic Arduino Antenna Switch project published on NCJ
[ Hits: 454 | Votes: 0 | Rating: 0 ]

Arduino Antenna Tuner - Arduino-based Automatic Amateur Radio Antenna Tuner
[ Hits: 303 | Votes: 3 | Rating: 9 ]
Automatic HF Antenna Tuner with Arduino - Make and automatic antenna tuner based on Arduino and using economic card. This ATU Project can be installed outdoors and controlled remotely by an rs485 link
[ Hits: 571 | Votes: 3 | Rating: 9.67 ]

Raspberry Pi and Automatic NOAA Satellite Reception - How to receive automatically NOAA wather satellite images with a Raspberry Pi and a RTL SDR. This project requires a Raspberry Pi 3 Model B a common NooElec SDR Dongle and a QFH Antenna in the attic. Article explains how to setup and configure software but no instructions on antenna.
[ Hits: 520 | Votes: 4 | Rating: 4.75 ]