Re: cordless headphones

[Dan Dugan <>]

Rich Peet, you wrote,

>Or maybe those infrared headphone units are more problem
>free?  The infrared units I have found so far are also 110 volt on
>the receiver end.

I think you mean the transmitter end, the headphones have a battery 
in them. I experimented with infrared stereo headphones some years 
ago when they first came out. They would fuzz out even near the 
transmitter if the receiver diode was shadowed. Definitely a 
short-range technology.

I was able to get a clear stereo transmission over a hundred yards 
down the railroad tracks that were in back of my place. I used 6" 
theatrical fresnel lenses to focus the beam. Only suitable for a 
fixed installation, of course.

-Dan Dugan


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