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Russian eeehf -17 tube. It measures 450mm long x 130mm at the widest point and has a 12-pin base and one external connector.

This device is used to generate elevation marks in Russian height finder radars. The electron beam scans at the same rate as the height finder aerial, and as it passes over the wires pulses are produced. It generates 17 pulses with pulse 5, 10 and 15 being longer (the relevant wire is fatter)

See the pictures further down.

Other markings on the tube include 0885 (presumably the serial number) and OTK81

Base connections are as follows:

1 Heater
2 Cathode
3 Heater
4 Grid
5 n/c
6 no pin
7 Right deflector
8 n/c
9 A2
10 Accelerator
11 Left deflector
12 n/c
13 no pin
14 A1
End cap Collector

Heater voltage6.3V
Heater current470 to 660mA
Anode 1 voltage100 to 400V
Anode 2 voltage1500V
Grid voltage-10 to -100V
Collector voltage1500V
 russian tube

end viewTop of the tube. A single external connector connects to an arc shaped structure inside.

 

rusian tuberussian tubeTwo views of the arc shaped structure. A series of 17 fine wires run behind the arc.

russian tube gunThe electron gun has a single axis electrostatic deflector.

russian tube deflector

Thanks to Alex Kouznetsov for translating the original material and to John Kaesehagen for arranging this, and Damien Derbès for more information.

This file was last modified 15:50:15, Saturday November 12, 2011