Build a small space HF Antenna

A number of people within our hobby have restrictions on antenna placement for a number of reasons. Maybe our gardens are too small, maybe there are planning restrictions. Whatever the reasons most of us who fit into this category are always looking for an antenna to get us out there. We will never match the … Read more Build a small space HF Antenna

Build a 4:1 UnUn

Bifilar toroid

What is an UnUn ? Unbalanced to unbalanced- simple? An unun is an impedance transformer, usually 4:1 or 9:1, that will match an unbalanced antenna to a feed line. To buy or not to buy ? The question was “ Do I pay £35+ for a ready made unit, or do I make it myself?” I have taken … Read more Build a 4:1 UnUn

Build a Raspberry PI ADS-B SDR Aircraft Receiver/Feed

What is ADS-B Automatic, Dependant, Surveilance – Broadcast ADS-B is a system in which electronic equipment onboard an aircraft automatically broadcasts the precise location of the aircraft via a digital data link. The data is used by other aircraft and air traffic control to show the aircraft’s position and altitude on display screens without the … Read more Build a Raspberry PI ADS-B SDR Aircraft Receiver/Feed