The Build Starts !
Posted: Sat May 28, 2022 5:09 pm
OK i can now turn off the pc and turn my mind to the monitor idea i have picked a tube i have handy not to big nice size for this ,its a 14SX3Y4 5.5inch black and white CRT having 12.6V 75mA heater with tests ok on a conductivity and voltage test .
Data for most CRTS like this are hard to come by but there are scraps of information gold
Filament voltage : 12V Filament current :75mA
Typical operation:
Final anode : 8KV
Vg2 : 100V there also have 300V version
Vg1 : -35V +/- 10V
some one in Poland who experimented with one mentioned the below
On the focus grid i remember the focus grid is connect to ground.. This are tetrode electron gun the final voltage 8KV will work well at lower voltage just the brightness will decrease.
Well we will see when i get around to it all a nice start .
Edit found some information on pin out of the tube apart from heater i have not looked into this so this is handy Dutch information found below
1 Grid
2 Cathode (K)
3 Heater
4 Heater
5 ??Grid?? (G1)
6 Grid (stuck on the same thing as 1) (G2)
7 ??Focus anode?? (7)
So a 12V filament. G2 must be adjustable between +100 and +300V. G1 is connected to ground where the cathode is somewhere around +35V on its cut-off. G4 is a question, probably the focus voltage is somewhere between 0 and +300V - you can make it adjustable or just hang it on a fixed voltage and see if it is sharp.
Also
14SX3Y4-002
Key Specifications/ Special Features:
Unipotential electrostatic focus Aluminized screen Electromagnetic deflection High resolution Fast starting cathode Fully-ground precision for high accuracy and excellent concentricity Size: 14cm (5.5 inches)
Data for most CRTS like this are hard to come by but there are scraps of information gold
Filament voltage : 12V Filament current :75mA
Typical operation:
Final anode : 8KV
Vg2 : 100V there also have 300V version
Vg1 : -35V +/- 10V
some one in Poland who experimented with one mentioned the below
On the focus grid i remember the focus grid is connect to ground.. This are tetrode electron gun the final voltage 8KV will work well at lower voltage just the brightness will decrease.
Well we will see when i get around to it all a nice start .
Edit found some information on pin out of the tube apart from heater i have not looked into this so this is handy Dutch information found below
1 Grid
2 Cathode (K)
3 Heater
4 Heater
5 ??Grid?? (G1)
6 Grid (stuck on the same thing as 1) (G2)
7 ??Focus anode?? (7)
So a 12V filament. G2 must be adjustable between +100 and +300V. G1 is connected to ground where the cathode is somewhere around +35V on its cut-off. G4 is a question, probably the focus voltage is somewhere between 0 and +300V - you can make it adjustable or just hang it on a fixed voltage and see if it is sharp.
Also
14SX3Y4-002
Key Specifications/ Special Features:
Unipotential electrostatic focus Aluminized screen Electromagnetic deflection High resolution Fast starting cathode Fully-ground precision for high accuracy and excellent concentricity Size: 14cm (5.5 inches)