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Multi-purpose pentode (with two control grid) for HF amplification, generation and transformation.
Envelope: sub-miniature, glass.
Mass 4 g.

General characteristics:

Type 1J37b
Filament voltage, Volt 1,2
Anode voltage, Volt 45
2nd grid voltage, Volt 45
1st 1 grid voltage, Volt 0
1st 2 grid voltage, Volt 0

Type 1J37b
Filament (heater) current, mA 597
Anode current, mA 2,550.85
2nd grid current, mA £0,5
Reverse 1st grid current, mkA £0,1
Mutual conductance (grid 11=12), mA/V 1,25
Mutual conductance (each grid), mA/V 0,63
Equivalent noise resistance, kOhm £7
Vibration noise (by RA=5 KOhm), mV £60
Inter electrode capacitance, pF: input 2,25
output 2,7
transfer £0,008
Operation time, h 5000

Limited operating values:

Type 1J37b
Filament voltage, V 1,08 to 1,32
Anode voltage, V 100
2nd grid voltage, V 60
Cathode current, mA 4,5
Resistance in 1st grid circuit, MOhm 1
Tube temperature, 125

Operating environmental conditions :

Type 1J37b
Acceleration of vibration loads, g 10
by frequencies, Hz 5 to 600
Acceleration of multiple impacts, g 150
Acceleration of single impact, g 500
Continuos acceleration, g 100
Ambient temperature, 60 to +140
Relative humidity at up to 40C, % 98

1J37b curves

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