Yes, clearly the Raspberry Pi is the master. On boot to the desktop CLK1 is quiet, but starts up instantly when the sbitx process is initiated. When the sbitx process is terminated and I¡¯m back to the desktop CLK1 continues to produce an output at 40.0342 MHz, even after system shutdown, only to stop when the main power is shut off.
Jack
N6LN
John Terrell, N6LN