A Signal Amplifier Module For HF

In building QRP HF radios, having an RF signal level amplifier building block is handy. You want 50 Ohm output impedance, some reasonable gain, supply voltage of the usual 10-14V and ease of building using standard parts from your parts bin. Some searching around the interwebs came up with a good idea for circuit from… Read More »

Downloading QST Magazine In PDF Format

I don’t do Microsoft Windows. I don’t do Apple, either. Android and Linux are My Things. I subscribe to ARRL to get the digital version of their excellent QST magazine. Unfortunately, their support for offline reading in Linux is zero and their Android app is so poor as to be unusable. So I want to… Read More »

Clearing A favicon.ico From FireFox’s Cache

You know the problem – you’re a web developer and you’ve changed the favicon but can’t see the darned change, whatever you do. At the time of writing (spring 2015), version 36 of Firefox still needs to you to jump through a whole bunch of hoops to make this happen. I’ve seen a few recipes… Read More »

Django On Ubuntu 14.04 With Python 3

Django is fast becoming one of the top choices for web application frameworks. It’s based on a much better language than PHP, a much less-weird language than Ruby and a lighter-weight environment than Java. Unfortunately Python suffers from a horrendous 2.x to 3.x incompatibility in the language and environment. I took the philosophical decision to… Read More »

TDR Pulse Generator For Testing Coax

I saw an excellent YouTube video from Alan W2AEW and thought I’d have a go at making a prettier version of the tool myself. After all, checking 50 Ohm coax cables is a common task for an amateur radio enthusiast.