This valve IS USED for diatheramy 500 watts, pvc welding machines, pre- HEATING purpose, AND for medical purpose
the 833a IS A power triode INTENDED FOR USE in rf amplifier, oscillator, or class b modulator service. The 833A features rugged construction for high power rf transmitter applications. The envelope is fabricated from hard glass intended specifically for the high-temperature operation of transmitting tubes.
The internal tube parts are supported by low loss ceramic insulators for high-temperature operation and high voltage hold-off. The rugged grid structure is particularly well suited for industrial heating applications.
Technical specifications
Electrical
Filament Thoriated-tungsten
Voltage (ac or dc) 10. 0 ±0. 5 vCurrent 10 a
Amplification factor (average) 35
Direct interelectrode capacitances (grounded filament)
grid to plate 6. 3 pf
grid to filament 12. 3 pf
plate to filament 8. 5 pf
Maximum frequency for full ratings 30 mhz
Mechanical
Cooling Forced air
Socket None. Post terminals
Operating position Axis vertical, with filament posts up or down; horizontal with plate in vertical plane (on edge)
Nominal dimensions diameter overall height 116. 8 mm (4. 60 in. ) 219. 2 mm (8. 63 in. )

This valve IS USED for diatheramy 500 watts, pvc welding machines, pre- HEATING purpose, AND for medical purpose
the 833a IS A power triode INTENDED FOR USE in rf amplifier, oscillator, or class b modulator service. The 833A features rugged construction for high power rf transmitter applications. The envelope is fabricated from hard glass intended specifically for the high-temperature operation of transmitting tubes.
The internal tube parts are supported by low loss ceramic insulators for high-temperature operation and high voltage hold-off. The rugged grid structure is particularly well suited for industrial heating applications.
Technical specifications
Electrical
Filament Thoriated-tungsten
Voltage (ac or dc) 10. 0 ±0. 5 vCurrent 10 a
Amplification factor (average) 35
Direct interelectrode capacitances (grounded filament)
grid to plate 6. 3 pf
grid to filament 12. 3 pf
plate to filament 8. 5 pf
Maximum frequency for full ratings 30 mhz
Mechanical
Cooling Forced air
Socket None. Post terminals
Operating position Axis vertical, with filament posts up or down; horizontal with plate in vertical plane (on edge)
Nominal dimensions diameter overall height 116. 8 mm (4. 60 in. ) 219. 2 mm (8. 63 in. )