Monochrome Computer CRT Brightness

[zeno]

MOST of the times on SS sets the cathode is where the video comes in.
Voltages will stay about the same otherwise.
There is a video output transistor ( 3 on color CRT's). If the brightness
is increased the voltage on the C voltage goes down. If you turn the brite
all the way up the C voltage goes up to the B+ value. No raster results.
SO if you get a good pix after the sub brite adj either that pot has
a bad spot or something is "off".

For the SM if the set has an FCC ID number or "type acceptance"
number look it up at FCC.GOV That will list the MFG of the
actual builder & its model number. Take it from there.

73 Zeno
LFOD !