vacuum-tube modulator

vacuum-tube modulator

[′vak·yəm ¦tüb ′mäj·ə‚lād·ər]
(electronics)
A modulator employing a vacuum tube as a modulating element for impressing an intelligence signal on a carrier.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.