In a previous post I wrote that I would be adding SSB and Data capabilities to my recently constructed plastic "ammo case" go-box for operations out in the Big Blue Sky Shack. Those modifications were completed much more quickly than I had anticipated. I am primarily a CW operator and have no immediate intention to … Continue reading Is a 20m Antenna also Resonant at 2.4GHz?
Author: John VA3KOT
I'm a Canadian amateur radio operator based in Owen Sound, Ontario. I hold an Advanced license and I am passionate about two things: operating outdoors and CW. My blog is focused on the experimental aspects of the hobby. I love to try out new ideas and, being retired, I have the luxury of time to spend doing so. Please like, comment and follow if you enjoy what you read here.
A DIY Antenna Launcher – for pennies
There are countless methods of launching a wire antenna into a tree that have been written about online. For example a PVC pipe air pressure machine. Sounds downright dangerous to me. Maybe they work just fine, but what if one of the joints isn't glued properly and the darned thing explodes in your face? Besides, … Continue reading A DIY Antenna Launcher – for pennies
A New FT-891 Ammo Case Go-Box for POTA
My inner voice recently told me to stop building, re-building, re-engineering and modifying my outdoor operations kit and just go get on the air with it. I told my inner voice to hush-up; I need to do this. Each iteration of my design feels like the ultimate build - until it has been out to … Continue reading A New FT-891 Ammo Case Go-Box for POTA
How to Self-Spot Off-Grid for SOTA/POTA Using HF
FT8 - the Marmite Mode Over in the UK grocery stores sell a product called "Marmite". It is a dark, sticky, yeast-based product with a very strong flavor. Aussies have a similar product called "Vegemite". These products are either loved or hated; so when the adjective "Marmite" is attached to something it means people are … Continue reading How to Self-Spot Off-Grid for SOTA/POTA Using HF
Can Just 1 Radial Really Be Better than 8, or More?
If you follow the advice often repeated on Internet forums you will learn that to make a vertical antenna as efficient as possible you will need as many radials as possible. After all, the AM broadcasters can't be wrong - they use hundreds of radials at the base of their towers. That advice may be … Continue reading Can Just 1 Radial Really Be Better than 8, or More?
9:1, 4:1, 1:1 or None:None?
When using a Random Wire antenna (also known as an End-Fed Random Wire - EFRW), the impedance at the feed end of the wire is usually higher than 50 ohms. In order to maintain a good match with a transceiver some form of impedance transformation is required to minimize SWR losses in the antenna system. … Continue reading 9:1, 4:1, 1:1 or None:None?
A 200ft Wire Antenna Up Zero Feet – How Does it Perform?
One of my local stores was offering 100ft reels of 16ga insulated wire on sale for a good price. I have bought this wire before and was very pleased with its flexibility - an important factor for field portable use where the antenna is subjected to constant winding and unwinding. The wire extends 200ft across … Continue reading A 200ft Wire Antenna Up Zero Feet – How Does it Perform?
Ditch That Automatic Tuner!
I was on the brink of pulling the trigger on the purchase of a new automatic antenna tuner for my portable rig recently, when something unexpected happened that slammed the brakes on the acquisition. For a few weeks I have been operating my Yaesu FT-891 with an LDG Z-11 automatic antenna tuner, but there are … Continue reading Ditch That Automatic Tuner!
How Does a Ground Tuning Unit Work?
I have spent many hours in my reclining thinking chair, posting ideas on the back of my eyelids while contemplating this very question. How indeed does a Ground Tuning Unit (GTU, aka Artificial Ground) actually work? I have a fairly reasonable comprehension of the theory behind antenna tuners, but tuning an entire planet? Now that's … Continue reading How Does a Ground Tuning Unit Work?
Ham Radio? What’s that?
Now we have moved into the summer season I have been getting quite a few folks stopping by while I am operating in a public park. Frankly, I prefer to be left alone to get on with my activation, but if somebody stops and starts to ask questions I feel I really should respond. Who … Continue reading Ham Radio? What’s that?
Ham Radio Outside the Box 