There are no 'busy' tones in a conventional repeater system.

"They would have been in trouble once the repeater system went down with the collapse of the first building," he said.

This technique allows for a smaller and less complex repeater system.

After I tried both repeater systems, the limitations were apparent.

I pushed the net because the repeater system in the building was dead.

Satellite: Not really a propagation mode, but an active repeater system.

Morse did not enable others to do more than make the repeater system that he described.

Morse, of course, disclosed apparatus only for the repeater system and no other.

The Port Authority recommended leaving the repeater system on at all times.

Amateur radio operators also install repeater systems on this building.