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Roehre

Die Röhre tauchte eines Tages in Altbeständen unseres OVs D06 Berlin-Spandau auf. Wir waren von ihr so begeistert, dass sie vom OV-Keller in unser Shack umzog und schließlich zu unserem Maskottchen auserkoren wurde.


 

GU-76 B Tetrode

The GU-76B power tetrode is used for RF signal amplification, including single-sideband signals, in stationary and mobile equipment not operating in motion.

 

GENERAL

Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metal ceramic, with outer copper anode.
Cooling: forced air.
Height: at most 341 mm.
Diameter: at most 224 mm.
Mass: at most 20 kg.

gu76b 1    

OPERATING ENVIRONMENTAL CONDITIONS

Ambient temperature, °C -10 to +55
Relative humidity at up to +25 °C, % 98

BASIC DATA

Electrical Parameters  
Filament voltage, V 11
Filament current, A 150-190
Mutual conductance (at anode voltage 2 RV, grid 2 voltage 1.3 kV, anode currents Sand 11 A), mA/V 85-115
Gain coefficient (at anode voltage 2 kV, grid 2 voltages 1 and 1.3 kV, anode current 8 A) 6-9
Anode current (at anode voltage 2 kV, grid 2 voltage 1.3 kV), A, at least 14.5
Negative bias voltage (at anode voltage 10 kV, grid 2 voltage 1.3 kV, anode current 2 A), absolute value 170-200
Negative cutoff voltage (at anode voltage 10 kV, grid 2 voltage 1.3 kV, anode current 0.3 A), absolute value, at most 270

 

Interelectrode capacitance, pF:  
input 350-385
output 35-45
transfer, at most 2.2
Output power (at filament voltage 11 V, anode voltage 10 kV, grid 2 voltage 1.3 kV, grid 1 voltage -250 V), kW, at least 40
Output power (corresponding to the current of singlesideband signal envelope at filament voltage 11 V, anode voltage 10 kV, grid 2 voltage 1.3 kV), kW, at least 30
Relative level of combination components (at output power at least 30 kW, filament voltage 11 V, anode voltage 10 kV, grid 2 voltage 1.3 kV, anode quiescent current 2A),dB:  
third-order components, at most -39
fifth-order components, at most -40

 

Limit Operating Values  
Filament voltage (AC or DC), V 10.5-11.5
Filament starting current, A 280
Anode voltage (DC), kV 11
Grid 2 voltage (DC), kV 1.5
Negative grid 1 voltage (instantaneous value), absolute value, V 700
   
Dissipation, W:  
anode 3x10³
grid 2 900
grid 1 300
Operating frequency, MHz 75
Anode temperature, °C 250
Temperature at hottest point of envelope, °C 200

 

gu76b 2
Averaged Characteristic Curves:
Uf = 11V; Ug2 = 1.5kV;
_____ anode:
_ _ _ Pa max

 

gu76b 3
Averaged Grid-Anode Characteristic Curves:
Uf = 11V; Ug2 = 1.5kV;
_____ grid 2;
_ _ _ grid 1

 

gu76b 4
Averaged Anode-Grid Characteristic Curves:
Uf = 11V; Ug2 = 1.5kV

 

gu76b 5
Averaged Characteristic Curves:
Uf = 11V; Ug2 = 1.5kV;
_____ grid 2;
_ _ _ grid 1

 

Quelle: http://www.tubes.ru/

 

   
© DL7AWO

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