You buying Soviet USSR IVL1-8/13 ИВЛ1-8/13 VFD Vacuum Luminescent Indicator tube, DIY Clock, NEW, NOS, condition see on photos.

Vacuum luminescent indicator type IVL1-8/13 has 12 digital digits (7-segment digit + dot), and one (leftmost) digit for displaying special characters. It is made in a glass case with 27 pins for mounting on a printed circuit board.

Technical characteristics IVL1-8/13:

Glow color green
Number of digits 12+1
Dimensions of the information field 10x100mm
Symbol dimensions 6x9.15mm
Viewing angle 45º
Ready time <0.1s
Nominal glow brightness 700cd/m²
Irregularity of glow brightness ±70%
The brightness of the glow at the end of the operating time 250cd/m²
Heating voltage 5V (4.25..5.5V)
Filament current 80mA (70..100mA)
Grid blocking voltage. not less than -5V
Anode-segment voltage 27V
Grid voltage 27V
Rated grid current 2.5mA
Pulse current of anodes-segments of one discharge 3mA
Duty cycle 10±1
Number of filament switching cycles 10000
Medium temperature -45..+70ºС
Operating time, not less than 30000 h

Pin assignment:
1 Cathode, conductive layer of balloon
2 Element K rank 13
3 Element L (minus sign)
4 M element of rank 13
5 Grid discharge 13
6 Element N,P digit 13
7 Segment "b"
8 Segment "e"
9 Segment "g"
10 Grid discharge 12
11 Discharge grid 11
12 Grid discharge 10
13 Grid discharge 9
14 Grid discharge 8
15 Grid discharge 7
16 Grid discharge 6
17 Grid discharge 5
18 Rank grid 4
19 Strike Grid 3
20 Grid discharge 2
21 Grid discharge 1
22 Segment "h" (decimal point)
23 Segment "f"
24 Segment "d"
25 Segment "c"
26 Segment "a"
27 Cathode

Connecting the outputs of the indicator IVL1-8/13 for the formation of numbers and characters:
- 0 - pins 7, 8, 9, 23, 25, 26;
- 1 - conclusions 23, 25;
- 2 - conclusions 8, 9, 24, 25, 26;
- 3 - conclusions 9, 23, 24, 25, 26;
- 4 - conclusions 7,  23, 24, 25;
- 5 - conclusions 9, 9, 23, 24, 26;
- 6 - conclusions 7, 8, 9, 23, 24, 26;
- 7 - conclusions 23, 25, 26;
- 8 - conclusions 7, 8, 9, 23, 24, 25, 26;
- 9 - conclusions 7, 9, 23, 24, 25, 26;
- Decimal sign from 1st to 12th digit - output 22;
- The first service sign of the 13th category - output 4.
- The second service sign of the 13th category - output 6.
- Point of 13th digit - output 2.
- Dash of 13th digit - output 3.

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