[bridkarl]

After I move across the country it will be one of the first things I look for. Apparently this only works with large console sets -- which surprises me. I would have thought making it work with a smaller table size model would have been good marketing.
These links explain the operation and background of the device.

https://philcoradio.com/repairbench/myst...ration.htm
https://philcoradio.com/repairbench/mystery/history.htm