Category: HamRadio

Followup on: where are all the hams?

A few months ago, I wrote a blog post asking the question "Where are all the hams?". For that blog post, I generated heat maps of regions of the world showing WSPR1 activity. A few days ago, I sent an email to Philip Gladstone, from the PSK Reporter's …


Programming the radio module SA818

Before you can use it, the SA818 radio module needs to be programmed. This is a guide to program the SA818 radio module.


Connecting your TYT on a Raspberry-Pi

Over the years, I have made several Allstar, Echolink, and APRS nodes1. A few months ago, my friend JC (W6IPA) told me he wanted to build an Allstar node. I gave him this piece of advice: if I had to make a new Allstar node, I would create a …


Antenna Presentation

Over the last few months, I have participated in an increasing number of discussions, either on local repeaters or in zoom meetings, about newly licensed hams interested in operating in the HF bands. Two main questions kept coming back: what radio to buy and what antenna to use. It is …


Remote Controlled Antenna Switch

A few months ago, I installed a new 40 and 80-meter dipole. My shack and my antennae are on opposite sides of the house. My feed line goes through narrow spots inside the house and runs underground from the house to the antenna. Installing a new feed line for this …


Where are all the hams?

When I build or install a new antenna, I always run a series of tests. Like everyone else, I look at the resonant frequency and SWR. But to see how the antenna is performing, I run WSPR1 for a few days. Then I use the data collected by WSPR …


80-meter NVIS antenna

I live in the middle of Silicon Valley in a suburban setting with small front and back yards. My property does not have tall trees to take advantage of when installing an antenna. Given these conditions, my best option was to use a vertical antenna. I got a Hustler 4BTV …


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