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CV1193 triode/hexode frequency changer

Size This valve measures 108x28mm overall and has an octal base.


Heater voltage 6.3V
Heater current 320mA
Max anode voltage 250V
Max screen voltage 100V
Oscillator anode voltage (applied through 30k ohms) 250V
Oscillator grid peak voltage 10V
Min control grid voltage -3V
Average total cathode current 11mA
Average conversion conductance (Vg1=-3, Vgo=10V peak) 225 micromhos
Average conversion conductance (Vg1=-35, Vgo=10V peak) 0.2 micromhos
Conversion impedance 2.5M ohms
Range of heater voltage for satisfactory operation 5.7 to 7.5V
Capacitances (measured with external shield)
Cg1-all 3.5pF
Cg1-a 0.12pF
Ca-all 5.5pF
Cgo-ao 2.0pF
Cao-all 5.5pF
Cgo-all 10.4pF
Cgo-g1 0.2pF


Pin Function
1 n/c
2 Heater
3 Anode
4 Screen grids G2 and G4
5 Oscillator and mixer grid G3
6 Oscillator anode
7 Heater
8 Cathode
TC Control grid, G1