T
T.C. Mann
- Jan 1, 1970
- 0
I just converted a 5" B&W TV into a very basic oscilloscope. I now
have a nice steady 60 Hz horizontal time base and can deflect the
vertical trace full screen with just 200mA @12V. The last item I
would like to improve is the keep the electron beam at a constant
voltage. Right now, the beam intensity varies based on the received
picture information. The little PCB on the back of the CRT neck has
only 4 wires going to it and 2 of the wires would have to be for the
heater. Could one of the other wires simply be tied to a constant
voltage source through a pot so I can vary the brightness or is there
a better way of doing this? Thank You - T.C.
have a nice steady 60 Hz horizontal time base and can deflect the
vertical trace full screen with just 200mA @12V. The last item I
would like to improve is the keep the electron beam at a constant
voltage. Right now, the beam intensity varies based on the received
picture information. The little PCB on the back of the CRT neck has
only 4 wires going to it and 2 of the wires would have to be for the
heater. Could one of the other wires simply be tied to a constant
voltage source through a pot so I can vary the brightness or is there
a better way of doing this? Thank You - T.C.