APRS AT Golden Packet 2016 NoVA Report

Using modest gear, station #6 of the Appalachian Trail Golden Packet exercise confirms 9600 bps works well for passing packets north and south.

Antenna pattern plots: Good intentions vs. good data

Just say no to handcrafted data graphs

In the 21st century should we believe antenna graphical gain data based on hope and hearsay? J-pole antenna gain drawings are a common bad example.

The dipole antenna, how industry defines it

All dipole antennas... according to the IEEE

Is a dipole antenna defined by its behavior alone or also how one energizes it? The answer exists in IEEE and historical literature.

Help Hamradio.me remove the ads

All, The time has come to change the way this web site operates and considering removing the ads plus completely revamping the format to include support for portable devices. I would never go the route of some web sites with numerous pop up ads and other very disruptive behaviors.  However, the revenue from advertising continues … Read more

Aluminum RF power splitters under test

Two RF power splitters

Two examples of square aluminum RF power splitters built from 1973 plans reveal a 15 MHz difference from the claimed design frequency.

Slim Jim vs. Traditional J-pole Antenna

Measured gain of SlimJIM and J-Pole

Real measurements of a Slim Jim antenna and traditional j-pole antenna reveal the truth about their respective gain and pattern.

Small Loop HF Antenna

With components from a variety of vendors, custom machining and a bit of trial and error, another variant of a small loop HF antenna is born.

KX4O 1B-Battery VA Field Day 2015

The 20m AHVD and 40m small loop antennas during KX4O 1B VA field day.

Despite a weak battery and few contacts, our 1B-Battery effort verifies a 40m small-loop and packet-radio NTS messaging using quick deploy antennas.