What you describe cannot possibly be due to the wiring of the interconnects, but it might be due to dirty contacts at either end. Try cleaning your RCAs, both male and female with any good contact cleaner. Or you may have a loose tube socket in the Cary. Both channels? (You realize the 2009 portion of this thread is long dead and the OP probably is not aware of your post.)
Stringreen, He wrote "at about 550 hours..."
Stringreen, He wrote "at about 550 hours..."