Position: Index > Protect Circuit >

FLYING_SPOT_SCANNER_PROTECTS_MICRO_FILM

2016-09-22 08:19  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


FLYING_SPOT_SCANNER_PROTECTS_MICRO_FILM
When black mark on microfilm covers quiescent spot, sweep is tripped and rectangular pulse on cathode of V2 cuts it off. 931A multiplier phototube then sees 22,000-ohm load through V1 to give correct output.-A. C. L. Brown, Flying Spot Inspects Tv Rating Records, Electronics, 35;9, p 31-34.