Lot - 1pcs. 
(Large quantity available)

 GU-78B Generator Tetrode Tube
SVETLANA
NOS
New from storage, without original BOX 

Attention:  
  • The tubes will be sent to you without the original packaging to minimize shipping costs.
  • Dates and Prints on tubes may not match what you receive upon purchase.
The Russian generator tetrode GU-78B tube ceramic-metal for power amplification at frequenciesup to 250MHz with an output power of at least 2.5kW


Description:
 The Russian generator tetrode GU-78B is designed to amplify high-frequency oscillations at frequencies up to 250MHz with an output power of at least 2.5kW. GU-78B is used for power amplification in amplifiers with distributed amplification and single-sideband signal.
It is produced in ceramic-metal design with an external anode and ring electrode leads.
Works in a vertical position, pins down. Forced air cooling not less than 280 m3/h.

GU – a letter that determines the type of tube: GU – generator tubes with a generation frequency of 30 to 300MHz;

78 – the number of the serial number of the development of this type of tube;

B – letter indicating the type of forced cooling: B – air.

Technical specification:
  • Heating voltage: 27V
  • Glow current: 3.4 – 4.0A
  • Anode voltage: 1.7kV
  • Voltage of the 2nd grid: 300V
  • Bias voltage of the 1st grid: – 51V
  • Lock-off voltage (at Ua=3kV; la=20mA), negative: no more than 150V
  • Anode current: 1.5A
  • Zero anode current (at Ua=250V; Uc1=0V): not less than 4.2A
  • Current of the 2nd grid zero (at Ua=250V; Uc1=0V): no more than 0.9mA
  • Slope: 60 ± 20mA/V
  • Output power in class AB1 mode (at Un=27V): 2.5kW
  • Output power in class AB1 mode (at Un=25.7V): 2.2kW
Limiting performance:
  • Heating voltage: 25.7 – 28.3V
  • Anode voltage constant: 3kV
  • Anode voltage (instantaneous value): 6.2kV
  • Voltage of the 2nd grid constant: 350V
  • Negative voltage of the 1st grid (absolute value): 150V
  • Cathode current: 2.2A
  • Current of the 1st grid (constant component): 25mA
  • Power dissipated by the anode: 2.5 kW
  • Power dissipated by the 2nd grid: 30W
  • Power dissipated by the 1st grid: 1W
  • Operating frequency: 250MHz
  • Cathode heating time: 240 sec.
  • Sheath and junction temperature: 200°С
Durability is not less than 2000 hours.

Reliable packaging for your order

Worldwide Shipping

See other lots