GU-29 - dual generator beam tetrode - is designed to work as an oscillation generator and amplifier in the meter wave range.

Pin assignment GU-29

1 Glow

2 First grid of tetrode #2

3 Second grids

4 Cathodes and beam plates

5 Glow (mid point)

6 First grid of tetrode #1

7 Glow

A1 Tetrode anode #1

A2 Anode of tetrode #2

Rated modes and main parameters of the GU-29 lamp:

Heating voltage

(series connection of threads) 12.6V

Glow current 1.125±0.125A

Anode voltage 400V

Voltage of the second grid 225V

Blocking voltage of the first grid (Ia=0.2mA) -55V

Second grid current 10mA

First Grid Reverse Current <4uA

Current of each anode 60±22mA

Input capacitance 15±2pF

Output capacitance 7±2pF

Capacitance 0.1pF

Oscillatory power 35W

Durability, not less than 500 h

Maximum permissible operating modes of the GU-29 lamp:

Filament voltage when the threads are connected in series 11.4..14.0V

Filament voltage when the threads are connected in parallel 5.7..7.0V

Anode voltage 750V

Voltage of the second grid 225V

Anode current 300mA

Power dissipated by the anode 40W

Power dissipated by the second grid 7W

Power dissipated by the first grid 1W

Voltage cathode-heater 100V

Leakage current cathode-heater 175mkA

The highest operating frequency is 200MHz

Cylinder temperature +175°С

Medium temperature -60..+100°C