Antique 930 Photo tube

threeneurons
6
570 views
  • About
  • Export
  • Add to
Antique 930 Photo tube picking up signal from common IR remote. These work using the photoelectric effect, first noted in the mid 1800s, and finally explained by Einstein. Circuit has two parts. One generates -75V to power the phototube, and the other section amplifies the tiny amount of current coming out of the tube, to a voltage as high as 10V.

0 comments