The generator tetrode GU-72 is designed to operate in the single-sideband power amplification mode in the frequency range up to 10 MHz. The cathode is indirectly heated oxide. Execution - glass-to-metal.

1. Filament current 0.95 ± 0.1 A.
2. Current of the 2nd grid, no more than 40 mA.
3. Slope 19 ± 4 mA/V.
4. The amplification factor of the 1st grid relative to the 2nd grid is 9.5 ± 2.5.
5. The grid locking voltage is negative, not more than 220 V.
6. Ready time, not less than 2 minutes.
7. Vibrational power, not less than 70 watts.
8. Interelectrode capacitances:
– input, no more than 37 pF,
– output 7.5 ± 2.5 pF,
– pass-through, no more than 0.1 pF.
9. Heating voltage 22 – 27.2 V.
10. Durability – not less than 1000 hours.
11. Weight – no more than 320 g.

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