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GS-27B

TETRODE

The GS-27B tetrode is used for RF voltage amplification in grounded-grid circuits in RF equipment.

GENERAL
Cathode: indirectly heated.
Envelope: metal-ceramic.
Cooling: forced air.
Height: at most 72 mm.
Diameter: at most 37.3 mm.

gs-27b(1)1.jpg

BASIC DATA Electrical Parameters
Heater voltage, V	11.4-13.8
Heater current, A	1.04-1.24
Mutual conductance, mA/V, at least	10
Peak cathode emission current, A, at least	5
Inverse grid 1 current, µA, at most	20
Output power, W, at least	40
Interelectrode capacitance, pF:
grid 1-cathode	6-9
grid 2-anode	2-3.5

Limit Operating Values

Heater voltage, V 11.4-13.8

Maximum anode dissipation, W 100

Maximum grid 1 dissipation, W 2

Maximum grid 2 dissipation, W 2

Maximum anode voltage, V 650

Maximum instantaneous anode voltage, V 1,800

Maximum grid 2 voltage, V 200

Maximum instantaneous grid 2 voltage, V 300

Bias voltage, V -50 to 0

Maximum anode current, mA 210

Maximum grid 1 current, mA 30

Grid 2 current (at grid 2 voltage not above 130V), mA -17 to +17

Warm up time, s, at most 60

Maximum operating frequency, MHz 1,000

Maximum envelope temperature, °C 200

gs-27b(2)1.jpg
Averaged Anode-Grid and Grid Characteristic Curves:
U_f = 12.6V; U_a = 1,000V;
_____ I_a;
_ _ _ I_g1

gs-27b(2)2.jpg
Averaged Anode and Grid-Anode Characteristic Curves:
U_f = 12.6V; U_g2 = 200V;
_____ I_a;
_ _ _ I_g1;
- . - I_g2

Limit Operating Values
Heater voltage, V	11.4-13.8
Maximum anode dissipation, W	100
Maximum grid 1 dissipation, W	2
Maximum grid 2 dissipation, W	2
Maximum anode voltage, V	650
Maximum instantaneous anode voltage, V	1,800
Maximum grid 2 voltage, V	200
Maximum instantaneous grid 2 voltage, V	300
Bias voltage, V	-50 to 0
Maximum anode current, mA	210
Maximum grid 1 current, mA	30
Grid 2 current (at grid 2 voltage not above 130V), mA	-17 to +17
Warm up time, s, at most	60
Maximum operating frequency, MHz	1,000
Maximum envelope temperature, °C	200