In article , Dennis Lee
Bieber wrote:
> Remotes of that period had just two buttons... Power and Volume.
> And volume tended to be "mute, low, medium, high" IN SEQUENCE.
>
> And the remote functioned by sending an ultrasonic whistle chirp ...

Wow. Fascinating. Thanks.

I don't think I ever saw a TV with remote control until at least the mid
1970s, and by then the technology was firmly in the i/r age.

I only knew remote control of TVs was "a thing" when I was young because
I'd seen an episode of an American show (my memory says it was "My
Favorite Martian", which was shown over here in the mid 1960s, but I
could be wrong) in which one of the characters (a teenage boy) was
watching the neighbour's TV through a window, and had somehow acquired
(stolen? duplicated?) a remote control so that he could change the
channel.

I had no idea, at the time (aged no more than about ten), how such a
thing might have worked ...

--
Cheers,
 Daniel.

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