I wonder can anybody help. I have a Denon cd receiver with a remote
control. Connected to it I have an Onkyo cassette deck. Both
machines have mini jack plug
sockets for remote control interconnection. Will the Denon (which has
the infrared sensor) control the Onkyo? Would connecting them be
likely to cause any damage?

As an alternative approach, would a "universal" remote be of any use?

I'd be very grateful for any advice.

John