Fred's Blog about Ham Radio, Python, Unix and more...

Tips For Mastering Repeaters

Ham radio repeaters play a crucial role in extending the range and enhancing the clarity of your amateur radio transmissions. They act as relay stations, receiving signals on one frequency and retransmitting them on another, allowing for broader coverage and improved reception. Whether you're a seasoned ham radio enthusiast or …

The HF Bands

Often, ham radio operators who just got their general license are confused about which band to use. Here's an explanation of each HF band's typical usage and characteristics.

100 Countries in 2 weeks with 10 Watt

I wanted to see how long it would take to contact 100 countries using automated software and only 10 watts. For that challenge, I wrote a plugin that replies to any call from any country I haven't worked at least 4 times.

Tracking Weather Balloons

A radiosonde or weather balloon is an instrument with a series of sensors to measure the atmosphere parameter from ground level to an altitude of up to 35,000 meters (100.000 feet).

Common Mode Current Choke

A couple of weekends ago, I took my trapped vertical antenna apart to clean it up, ensure every component was in good working condition, and fine-tune it. While working on the antenna, I noticed that the Common Mode Current choke box had a crack due to the hot California summer …

Hustler 4BTV Cleanup & Tuning

The Hustler 4BTV For most of my HF traffic, I use a Hustler 4BTV antenna. The antenna is a vertical trap antenna capable of working the 40, 30, 20, 15, and 10-meter bands without using a tuner. I installed this antenna five years ago, and it has always worked fine …

Telegram Propagation Bot

Telegram is an instant messaging application like iMessage, Google Chat, or WhatsApp focusing on security and privacy. I have used Telegram for this bot because Telegram provides a very extensive API allowing ...

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