GU-35B GU-35 GU35 ГУ-35 ГУ35  powerful generator tetrode GU-35B for operation as an oscillator and broadband high-frequency amplification at frequencies up to 250 MHz in television transmitters.

Design - metal-glass, with an external anode and annular leads of the 2nd grid and cathode.

Datasheets: https://rudatasheet.ru/tubes/gu-35b-1

General characteristics

Filament voltage, Volt	6.3
Anode voltage, Volt	1000
2nd grid voltage, Volt	800
Plate current, mA	1000

Filament (heater) current, A	34±4
Plate current, A	1.8±0.5
Reverse 1st grid current, mkA	no more than 50
1st grid voltage, Volt	no more than - 100
Mutual conductance, mA/V	24 to 31
Gain coefficient of 1st grid in relative to 2nd grid	11±2
Inter electrode capacitance, pF: input	56
output	6
transfer	0.7
Operation time, h	more than 2000

 The working position is vertical.
Cooling - forced:
- anode - air at least 400 m3 / h,
- legs - air not less than 100 m3 / h,
- cylinder - air at least 60 m3 / h.
Weight 2.5 kg.