The design Loftur published on the project site was built around two A4975SBT ic’s. Although they are available at digikey.com…
Continue Reading
Automatic Magnetic Loop Tuner – Rotary Encoder
The rotary encoder is the most expensive part of the automatic magnetic loop tuner. It’s a little more expensive than…
Continue ReadingAutomatic Magnetic Loop Tuner – Region 1 SSB Field day
CQ field day, CQ field day, this is ON5IA/P. The proof of the pudding is in the eating, as they…
Continue ReadingAutomatic Magnetic Loop Tuner – First QSO
On the 15th of March 2017, we were ready to test our final product. The Automatic Magnetic Loop Tuner was…
Continue ReadingAutomatic Magnetic Loop Tuner – Assembly
The PCB is soldered, we did the metal work and the paint job on the project box. Now we are…
Continue ReadingAutomatic Magnetic Loop Tuner – Metalwork
Now it’s time to put the soldering iron down for a while and pick up our metal working tools. Our…
Continue ReadingAutomatic Magnetic Loop Tuner – SWR Bridge In A RF Shielded Box
Since we are dealing with RF we have to keep it away from all other components and equipment in our…
Continue ReadingAutomatic Magnetic Loop Tuner – SWR Bridge
While reading the frequency from the radio, and having the “antenna characteristics” in the tuner’s memory, there is no real…
Continue ReadingAutomatic Magnetic Loop Tuner – Soldering Components
When all components were delivered, it was time to put them all together. The effort I spent writing custom references…
Continue ReadingAutomatic Magnetic Loop Tuner – Bill of materials (BOM)
The first thing we did on our first project meeting was having a look at the BOM. What components do…
Continue ReadingAutomatic Magnetic Loop Tuner – The Beginning
Somewhere in March 2016, I was in a QSO over our local Brandmeister DMR repeater with other club members. Every…
Continue ReadingSontheimer Bridge – SWR Bridge
For the Automatic Magnetic Loop Tuner project I needed an SWR Bridge (Standing Wave Ratio) which could handle 200 W.…
Continue Reading