Last television using ultra sonic remote

[ChrisW6ATV]

Originally Posted by KV-1926R

Interesting, I have a Sony ultrasonic remote with four vertically arranged round buttons for power, volume, VHF and UHF. Got to wonder what period that is from. My 1987 Trinitron has fully electronic tuning and uses an infrared remote.

I bought the high-end Sony Profeel monitor and tuner in early 1982, and they used an infrared remote control. So, at least their top-of-the-line equipment was already IR as of 1981-82.