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Ukraine, Rovno
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Technical characteristics
  • BrandСветлана, С.Петербург
  • Country of manufactureRussia


Generating tetrode of GU-74B for work in not reconstructed one-band radio-transmitting devices and strengthenings of a one-band signal at frequencies up to 60 MHz.

Registration - ceramic-metal.

Cooling - air compulsory 35 m3/h.

Weight: 550 g.

Specifications: SB3.312.115 TU1.

Key GU-74B technical parameters:
at Un =12,6 B, Ua =1 of kV, Uc2=300 B, Ia =600 ma
Heat current

3,6 ± 0,3 A

Tension of shift of the 1st grid negative

24 ± 6 V

Anode current (at Ua of =250 V, Uc1=0)

not less than 1400 ma

Current of the 2nd grid (at Ua of =250 V, Uc =0)

no more than 360 ma

Current of the 2nd grid

no more than 20 ma

Current of the 1st grid the return

no more than 50 mk

Steepness of the characteristic

32 ± 6 ma / In

Coefficient of strengthening of the 1st grid concerning the 2nd grid

6,5 ± 2

Oscillatory power in the class AB1 mode
- at Un =12,6 B

not less than 550 W

- at Un =11,3 B

not less than 440 W

Available time

no more than 2,5 min.

The interelectrode capacities, pf:
- entrance

51 ± 5

- output

11 ± 2

- checkpoint



not less than 1000 h

Limit operational characteristics of GU-74B:
Heat tension

11,9 - 13,3 B

Cathode current (effective value)

1,5 A

Anode current

0,5 A

Anode tension:

2 kV


4 kV

Tension of the 2nd grid

300 V

Tension of the 1st grid negative

150 V

The power disseminated by the anode

600 W

The power disseminated by the 2nd grid

15 W

The power disseminated by the 1st grid

2 W

Working frequency

60 MHz

Cover temperature

200 C

Interval of working ambient temperatures

from-60 to +50 With

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