How to find out if your common mode current choke really works

What is common mode current? It is the current that flows along the outer surface of your coax shield from your antenna back towards your radio. It can cause SWR problems, erratic behaviour of radio equipment and even RF shocks when you touch metal parts of your rig. A coax cable has three conductors! Due … Continue reading How to find out if your common mode current choke really works

Flirting with Radiation at Wasaga Beach Provincial Park

The first of November 2022 was an unusually warm day in Southern Ontario so the urge to go and activate a new-to-me park was irresistible. Wasaga Beach Provincial Park (POTA entity VE-0426) is about a one hour drive from my home in Owen Sound but it's a very pleasant drive along the south shore of … Continue reading Flirting with Radiation at Wasaga Beach Provincial Park

How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m

Field expedient antennas differ from home-based, permanent antennas. At a home QTH there is often plenty of room to install a larger, higher antenna. In the home shack, the radio is often capable of putting out a much more powerful signal than a field radio. Out in the field, for example at a campsite, space … Continue reading How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m

Grounds for Improvement

As I write this post my sophisticated home weather station shows the temperature has just edged over the 30 degree Celsius mark. I call it sophisticated because it synchronizes with the US national time standard in Fort Collins, Colorado by receiving VLF (Very Low Frequency) radio signals - without an antenna! Wait a Canadian corn … Continue reading Grounds for Improvement

80m Band Antenna Fits Into Just 1 Square Foot!

Incredible isn't it? But can it really work? "It must be a compromise antenna, or very low efficiency." "Why don't you just put up a good old-fashioned dipole? "One square foot? Are you crazy?" No, we'll yes, I may be a bit crazy but believe me, the performance of my "one square footer" is no … Continue reading 80m Band Antenna Fits Into Just 1 Square Foot!