GU-34B (original box)

Generator tetrode GU-34B in glass-to-metal design with indirectly heated oxide cathode and forced air cooling. Designed to operate as a broadband high-frequency oscillation amplifier at frequencies up to 250MHz and with an output power of at least 400W.
Works in a vertical position, pins down.
Forced cooling:
– anode – air at least 80 m3/h;
– legs – air not less than 80 m3/h

Stamp of technical control department of the manufacturer “ ОТК “ 

Technical specifications:

• Heating voltage: 13.9V
• Anode voltage: 4kV
• Voltage of the 2nd grid: 600V
• Power dissipated by the anode: 500W
• Power dissipated by the 2nd grid: 20W
• Power dissipated by the 1st grid: 5W
• Cathode current (DC): 540mA
• Operating frequency: 250MHz
• The temperature of the leg, anode and junctions of metal with glass: 150°C
• Ambient operating temperature range from: -60 to +50°C
• Filament current: 3.3 – 4A
• Slope: 22 – 34mA/V
• Gain: 19
• Cathode heating time: no more than 2.5 min.
• Output power: not less than 400W

Operating time not less than 2000 hours.