[Tom Hall], along with many hams around the world, have been hacking the Silicon Labs Si5351 to create VFOs (variable frequency ... used a Teensy 3.1 Arduino compatible board, to control the ...

April 30, 2025 /PRNewswire/ -- 360Quadrants has released its latest Variable Frequency Drive (VFD ... of which the top 3 were categorized and recognized as quadrant leaders.