TV monitor TMD 306

A black-and-white, vacuum-tube TV monitor. The difference between a TV monitor and a regular TV receiver is the absence of a high-frequency part that would receive the radio-frequency signal from the antenna. The video signal was connected to the monitor in base band by a cable. On the other hand, the image electronics of the monitor was usually much more complicated to provide the best possible image. Despite their complexity, these vacuum-tube monitors were fairly reliable.