Manufacturer: WALTHER
Model: ETR2
AKA:  
Year: 1972
Display: Nixie (8)
Circuits: ELECTRONIC ARRAYS
(See further on this page)
Dimensions: 210x155x55 mm
Power type: 220V
Origin: Germany
S/N: 2250462 2924247
Owner: DEVIDTS Serge

 

Feature  

Description 

Case:  

 

Color case:  

 

Color keyboard:  

 

Weight:  

1000 g 

Voltage selection:  

 

Adapter:  

 

Power consumption:  

6 W

Working condition:  

0 to 40 degrees C 

Printed Circuit Boards (PCB's):  

 

Memories:  

 

Memories indication:  

 

Prog. steps:  

 

Decimal point handling:  

 

Rounding:  

 

Calculation overflow indication:  

 

Input overflow indication:  

 

Divide by Zero indication:  

 

Square root of negative value indication:  

 

Negative value indication:  

 

Constant function:  

 

Auto Power-off:  

 

Display details:  

 

Keyboard details:  

 

Printer:  

 

Extra features/remarks:  

Calculation speed:
Addition and Subtraction: 2 ms
Multiplication and Division: 100 ms 

Initial price:  

 

Overall quality rate (1-10):  

 

OEM-copies:  

 

Other sources of info:  

SIGG Markus

Advertisements/Publications:  

 


This is one of the few electronic calculators from WALTHER,

Most WALTHER-calcs are mechanical ones.
Unfortunately, this modular-constructed device is not working anymore.


smd12860.jpg (28906 bytes)

Keyboard-module ^

smd12859.jpg (15431 bytes)

Keyboard-module: reed-switches ^

smd12862.jpg (54468 bytes)

IC-layout: ^
IC's from ELECTRONIC ARRAYS
1. FDY: 1508-5005
2. FDY: 160-5014
3. FDY: 120-5013
4. FDY: 170-5017
5. FDY: 110-5001
6. FDY: 310-7014

smd12861.jpg (16954 bytes)

NEC: LD8007: Nixie-tube detail (back) ^

smd12857.jpg (30893 bytes)     smd12858.jpg (16208 bytes)

Labels on the back ^