Yep, It's done all the time in non ham circuits. Motorola has or had two or three pulse control circuits.
You see these type of controls at airports for the runway lights, metro hospitals for the Motorola Hear system, ACC controller reverse control from an HF radio (typical marine radio) and a "shack master" and again with Motorola's old Micom HF Marine System. They were all original pulse counter circuits, which are now better done with a small pic or uP controller circuit. The potential for trouble is with inexperienced users, pranksters and undesired pulse noise. Sometimes they are from the same location... cheers, skipp > "chris_inos" <[EMAIL PROTECTED]> wrote: > can one remotely activate a repeater without tones? > Say: > click PTT three times within 3 seconds and repeater > is up. click PTT four times within 3 seconda dn > repeater is down > thanks > csi Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/