Double beam tetrode for output stages of low frequency amplifiers.
Envelope: glass.
Mass 100 g.

Lead diagram

General characteristics:

Filament voltage in case of series connection, Volt	6.3
Filament voltage with filament placed in parallel, Volt	12.6
Anode voltage, Volt	350
1st grid voltage, Volt	-22
2nd grid voltage, Volt	200
Filament (heater) current in case of series connection, A	1.05±0.15
Filament (heater) current with filament placed in parallel, A	2.1±0.3
Anode current of each tetrode, mA	47.5±17.5
2nd grid current (UC1=0V), mA	no more than 60
Gain coefficient of 1st grid relatively to 2nd grid	10
Reverse 1st grid current, mkA	no more than 0,5
Vibration noise (at RA=2 kOhm), mV	no more than 800
Inter electrode capacitance, pF:
input	13±3
output	6±2
transfer	no more than 0,3
Operation time, h	≥1000

Limited operating values:

Filament voltage in case of series connection, V	5,7 to 6,8
Filament voltage with filament placed in parallel, V	11.4 to 13.8
Anode voltage, V	600
2nd grid voltage, V	300
1st grid voltage, V	-175
Cathode – heater voltage, V	100
Cathode current (average/peak), mA	250/1500
Each anode dissipation, W	20
1st grid dissipation, W	1
2nd grid dissipation, W	7

Operating environmental conditions:

Acceleration of vibration loads, g	2.5
at the frequencies, Hz	5-200
Acceleration of multiple impacts, g	12
Ambient temperature, °C	–60 to +100
Relative humidity at up to 40°C, %	98
Tubes operating temperature, °C	250
Cathode heating time, s	90

Plate curves

Plate-grid curves