Dennis Lee Bieber wrote:
> And the remote functioned by sending an ultrasonic whistle chirp (each
> button compressed a bellows against a spring loaded valve -- when the
> pressure was high enough, the valve would open and the air would pass
> through a tuned frequency whistle port; different frequency for power vs
> volume).

I remember mine, it was chrome.  Channel up/down as well.  I think the 4
functions were power, sound, up, down.  The sound could go in 1
direction in 4 steps and cycle, mute low med hi as I recall.

--
Mike Easter

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