GU-47 B

TETRODE

The GU-47B tetrode is used as a power amplifier at frequencies up to 70 MHz

GENERAL
Cathode: directly heated, carbonized thoriated tungsten
Envelope: glass-to-metal, with ring leads of cathode
and grids
Envelope: forced air.
Height: at most 260 mm.
Diameter: at most 124 mm.
Mass: at most 2 kg

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequencies, Hz	10-80
acceleration, m/s²	39
Multiple impacts with acceleration, m/s²	118
Ambient temperature, °C	-60 to +70
Relative humidity at +40 °C, %	95-98

BASIC DATA Electrical Parameters
Filament voltage (AC or DC), V	6.3
Filament current, A	57-67
Resistance of unheated cathode, Om, at most	0.01
Grid 2 voltage, kV	0.9
Negative grid 1 voltage (at anode voltage 2 kV, anode current 2.5 A), V	15-27
Anode current at zero grid 1 voltage (at anode voltage 1 kV and grid 2 voltage 1 kV), A,at least	3.2
Anode current (at anode voltage 5 kV and grid 1 voltage —110 V), A, at most	0.55
Mutual conductance (at anode voltage 1 kV and anode currents 2 and 2.5 A), mA/V	36-44
Gain coefficient (grid 2-grid 1) (at anode voltage 1 kV, grid 2 voltage 2 kV, anode current 2 A)	8-12
Oscillator output power in the grid keying mode (at anode voltage 6 kV, pulse duration at most 1 s, pulse period-to-duration ratio at least 10, at up to 100 MHz), kW	12
Interelectrode capacitance, pF:
input, at most	100
output, at most	19
transfer, at most	0.5

Limit Operating Values
Filament voltage (AC or DC), V	6-6.6
Filament starting current, A	90
Anode voltage, kV	6
Grid 2 voltage, kV	1.2
Dissipation, W:
anode	4x10³
grid 2	300
grid 1	50
Operating frequency, MHz	70
Temperature at envelope, stem and glass-to-metal seals, °C	150
Anode temperature, °C	180

Averaged Characteristic Curves:
U_f = 6.3V; U_g2 = 1.2kV;
_____ anode;
_ _ _ grid-anode;
- . - P_{a max}

Averaged Characteristic Curves:
U_f = 6.3V; U_g2 = 1.2kV;
_____ anode-grid;
_ _ _ grid 1;
- . - grid 2

Characteristic Curves Showing Maximum Peak Grid 2 Dissipation versus Pulse Duration (at 1/duty faktor 0 at least 10)

Characteristic Curves Showing Maximum Peak Anode Dissipation versus Pulse Duration (at 1/duty faktor 0 at least 10)

Main Menu | All Types | Contact Us | Order Form | Warranty | Quality | Company Profile