Scanning disk television

[tubesrule]

Congratulations on getting your first images on your set!

It is my understanding that all but a few original mechanical sets used some form of frame synchronization. This was usually in the form of a synchronous AC motor that would be on the same power grid as the transmitter, or a small synchronous motor (typically called a phonic coil) that brought the main AC/DC motor spinning the disk into sync. The only set I am aware of that had no synchronization mechanism was the GE Octagon.
You could use the phonic coil method to sync your disk, and this would work very well. I also believe the NBTV web site has a schematic in which an opto-interrupter is placed around a reference hole in the disk, and used to drive a feedback loop to control the DC motor. This method also works very well.

Darryl