Okay, my landlady has two vintage stereos. One is with a Pioneer SX636 receiver and the other is some old Technics integrated amp... She wanted to have the two talk to each other, i.e. feed the output from system one into system two & visa versa... Now in the olden days, most o these pieces, you could simply feed output from the tape 2 out into lets say CD or Aux in on the other piece & voila' be listening to whatever was playing one the one system. I tried this... and get zero! I tried on both systems to no avail!

What workaround is there if any?

Help! and thanks in advance... It's always the freebies and brother in-law jobs that have little problems like this!