[madengr]

In the DC area in the 80’s, there was a system called Super TV that broadcast adult entertainment at ~900 MHz. I believe they removed the vertical sync, in addition to requiring a UHF dish and tuner.

Anyway, as a kid, I found you could take an old B&W set with the fine tuning knob, and set it between channel 87 & 88, then manually get a few seconds of restored sync by twiddling the fine tuning.

Used that same TV on my C64, and few years later, the same TV could be used to eavesdrop on AMPS cell phones. Versatile devices.