I have a RITTENHOUSE RM-20/RM-22 RADIO-INTERCOM SOUND SYSTEM.
THERE IS A STATION IN EVERY ROOM IN THE HOUSE SOME WORK SOME DONT .MOST DON'T WORK .SOME HAVE A BAD CONNECTION IT SEEMS ALSO.OR MAYBE OVER THE YEARS A HOUSEKEPER DOING THEIR JOB SPRAYED TO MUCH 409 ON AND INSIDE.HOPE YOU CAN HELP ME OUT.THANK YOU.