STC NavigatoR / Transmitting Tubes / Tube gs-15b

GS-15B

TETRODE

The GS-15B tetrode is used as a RF oscillator and amplifier in continuous operation in grounded-grid circuits.

GENERAL
Cathode: indirectly heated, oxide-coated, dispenser.
Envelope: metal-ceramic with ring leads.
Cooling: forced air.
Height: at most 69 mm.
Diameter: at most 37.1 mm.
Mass: at most 140 g.

gs-15b(1)1.jpg
KP - cathode and heater; P - heater; C1 - grid; C2 - grid 2; A - anode

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequency, Hz	5-1,400
acceleration, m/s²	98
Multiple impacts with acceleration, m/s²	1,470
Linear loads with acceleration, m/s²	2,940
Ambient temperature, °C	-60 to +100
Relative humidity up to +40 °C, %	98

BASIC DATA
Electrical Parameters

Heater voltage (AC or DC), V 6.3

Heater current, A 1.85-2.2

Anode voltage (DC), V 900

Grid 2 voltage (DC), V 250

Mutual conductance (at grid 1 voltage reduction by 1 V and anode current 0.2 A), mA/V, at least 9

Grid 1 inverse current (at anode current 0.2 A), µA, at most 20

Warm up time (at anode voltage 1.5 kV, grid 2 voltage 300 V, anode current 0.24 A, drive power 15 W at wavelength 30 cm), s, at most 60

Oscillator output power in amplification mode (at anode voltage 1.5 kV, grid 2 voltage 300 V, anode current 0.24 A, drive power 15 W at wavelength 30 cm), W, at least 160

Interelectrode capacitance, pF:

grid 1-cathode 6-8.5

grid 2-anode 1.5-2.3

Limit Operating Values

Heater voltage (AC or DC), V:

maximum 6.6

minimum 6

Maximum anode voltage (DC), kV 1.37

Maximum grid 2 voltage (DC), V 300

Grid 1 voltage, V:

maximum 0

minimum -100

Dissipation, W:

anode 200

grids 3

Maximum anode current, A 0.24

Grid 2 current, mA:

maximum 10

minimum -10

Grid 1 current, mA:

maximum 40

minimum 0

Maximum drive power, W 12

Minimum oscillator output power, W 112.5

Minimum wavelength, cm 30

Maximum temperature at envelope and leads, °C 200

gs-15b(3)1.jpg
Averaged Characteristic Curves:
U_f = 6.3V; U_g2 = 300V;
_____ anode;
_ _ _ grid-anode

gs-15b(3)2.jpg
Averaged Characteristic Curves:
U_f = 6.3V; U_g2 = 1.5kV;
_____ anode-grid;
- - - grid

gs-15b(3)3.jpg
Averaged Characteristic Curves Showing Oscillator Output Power versus Anode Voltage:
U_f = 6.3V; U_g2 = 300V; P_in = 15W; L = 30 cm

gs-15b(3)4.jpg
Averaged Characteristic Curves Showing Oscillator Output Power versus Input Power:
U_f = 6.3V; U_g2 = 300V; I_a = 240 mA; L = 30 cm;
_____ oscillator output power (P);
_ _ _ gain coefficient

BASIC DATA Electrical Parameters
Heater voltage (AC or DC), V	6.3
Heater current, A	1.85-2.2
Anode voltage (DC), V	900
Grid 2 voltage (DC), V	250
Mutual conductance (at grid 1 voltage reduction by 1 V and anode current 0.2 A), mA/V, at least	9
Grid 1 inverse current (at anode current 0.2 A), µA, at most	20
Warm up time (at anode voltage 1.5 kV, grid 2 voltage 300 V, anode current 0.24 A, drive power 15 W at wavelength 30 cm), s, at most	60
Oscillator output power in amplification mode (at anode voltage 1.5 kV, grid 2 voltage 300 V, anode current 0.24 A, drive power 15 W at wavelength 30 cm), W, at least	160
Interelectrode capacitance, pF:
grid 1-cathode	6-8.5
grid 2-anode	1.5-2.3

Limit Operating Values
Heater voltage (AC or DC), V:
maximum	6.6
minimum	6
Maximum anode voltage (DC), kV	1.37
Maximum grid 2 voltage (DC), V	300
Grid 1 voltage, V:
maximum	0
minimum	-100
Dissipation, W:
anode	200
grids	3
Maximum anode current, A	0.24
Grid 2 current, mA:
maximum	10
minimum	-10
Grid 1 current, mA:
maximum	40
minimum	0
Maximum drive power, W	12
Minimum oscillator output power, W	112.5
Minimum wavelength, cm	30
Maximum temperature at envelope and leads, °C	200