RCA TM-21B Color Monitor

[vintagecollect]

Good to hear you chime in, That saba projection unit is coool. I wish more american sets were beautiful like that. Here's pic of kloss in lab while using monitor round screen
size shortened top and bottom probaly to mimic 4:3 for videobeam screen validating with henry kloss at the controls. Person working at advent said theses were for accurate NTSC referencing. Click on green arrows to see pic enlarged when popped up.

[old_tv_nut]

The number above the screen was a piece of plastic to indicate the source (camera number), as this was a studio monitor with baseband composite input (no tuner). The "underscan" operation shown in the picture was selectable with a switch to show the complete image without corner cutoff. Part of the complication of studio monitors was to maintain linearity and convergence when in both underscan and "normal" modes.