GU-50

Filament current, A

0.705±0.065

Anode current, mA

≥50

1^st grid current, mA

≤8

2^nd grid current, mA

≤5

1^st grid reverse current (at 2^nd grid current 15 mA), µA

≤15

3^rd grid reverse current (at 2^nd grid current 15 mA), µA

≤25

Cathode-to-filament leakage current, µA

≤100

1^st to 2^nd grid penetration factor

19±3%

1^st grid Q-point voltage (negative), V

40±10

3^rdgrid cut-off voltage (negative), V

205±55

Mutual conductance, mA/V

4±1

Oscillation power, W

at filament voltage 12.6 V

at filament voltage 10.8 V

≥60

≥52

Interelectrode capacitance, pF

grid-to-cathode

anode-to-cathode

grid-to-anode

14±1

9.15±1.15

≤1

Durability, h

≥1750

Durability test: oscillation power at filament voltage 10.8 V, W

≥36

Filament voltage, V

10.8-14.5

Anode voltage, kV

1

2^nd grid voltage, kV

0.25

Cathode-to-filament voltage, V

200

Anode current, mA

230

Anode power dissipation, W

40

2^nd grid power dissipation, W

5

1^st grid power dissipation, W

1

Envelope temperature, ^oC

200

Ambient air temperature, ^oC

-60..+100