Manufacturer: ELEKTRONIKA
Model: 111
AKA: Iskra 111
Year: 1972
Display: Nixie (12)
Circuits: See further on this page
Dimensions: 365x295x115 mm
Power type: 220V
Origin: USSR
S/N: 11406
Owner: DEVIDTS Serge
Info:  

Strange calculator from the USSR
When turning on this calulator, the nixie-tubes are lighting up one by one,
it takes approximately 2 min. before all nixies are active,


    smd13129.jpg (61769 bytes)    smd13125.jpg (17218 bytes)

The nixie-tubes are rather big and the numbers are strange formed ^

smd13124.jpg (11171 bytes)

smd13126.jpg (7382 bytes)

'Normal'- and 'Error'-display ^

smd13212.jpg (3190 bytes)
Clears display ^

smd13211.jpg (3747 bytes)
Clears error input ^
12 [+] 3 [CK] 4 [=] 16

smd13207.jpg (3064 bytes)
Memory ^
12 [A]
25 [+] [A] [=] 37

smd13208.jpg (3446 bytes)
Addition to memory ^
10 [A]
30 [rounded 1] 40
25 [+] [A] [=] 65

smd13230.jpg (3963 bytes)
Back divide ^
2 [-:-|] 3 [=] 1.5

smd13206.jpg (3891 bytes)
Percentage ^
e.g. How much is 5% of 800:
800 [%] 5 [=] 160

smd13209.jpg (2912 bytes)
Percentage ^
e.g. 20% of how much is 160:
160 [/%] 20 [=] 800

smd13210.jpg (3145 bytes)
Minus ^
160 [/-/] -160

 

smd13128.jpg (57179 bytes)

Internals ^

smd13130.jpg (30880 bytes)

White box (under the keyboard) with a Delay Line Memory ^


smd13131.jpg (10094 bytes)

Keyboard reed-switch ^

smd13132.jpg (41369 bytes)

Power-department and the rather
'standard' swith to turn on/off this machine ^

smd13133.jpg (105547 bytes)

The prints-circuits: ^
Detail of print 1 (front & back)
Detail of print 2
Detail of print 3
Detail of print 4
Detail of print 5
Detail of print 6
Detail of print 7
Detail of print 8
Detail of print 9
Detail of print 10
Detail of print 11
Detail of print 12
Detail of print 13

smd13123.jpg (13721 bytes)

One of the 196 circuits situated on the prints ^

smd13135.jpg (18956 bytes)     smd13134.jpg (21584 bytes)

Labels ^

Instruction Manual ^
Image courtesy: BATZ Marco