PCB

Automatic Magnetic Loop Tuner – Another Soldering Session

I took some time to solder another PCB for an Automatic Magnetic Loop Tuner. I made some pictures of the…

6 years ago

Automatic Magnetic Loop Tuner – Printed Circuit Board (PCB)

Using the original schematic as a starting point, I reworked the electrical diagram and incorporated an A4988/DRV8825 module. You can…

6 years ago

Automatic Magnetic Loop Tuner – A4975STB, A4988 or DRV8825

The design Loftur published on the project site was built around two A4975SBT ic's. Although they are available at digikey.com…

6 years ago

Automatic 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…

6 years ago

Automatic 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…

6 years ago

Automatic 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…

6 years ago

Sontheimer Bridge – SWR Bridge

For the Automatic Magnetic Loop Tuner project I needed an SWR Bridge (Standing Wave Ratio) which could handle 200 W.…

6 years ago