"K3HVG" wrote in message
...

a previous owner may have none the less simply moved/installed (in this
case) a phone jack on the panel for convenience.

That's probably what it is and another reader who e-mailed me also thinks it
is. It sort of surprised me as I think brother inlaw bought these new and
don't think he ever used headphones. I'm going to hook it up as soon as I
find time but may open it up and have a look first.

Thanks, RM~