Homepage
Crypto
Index
Glossary
Enigma
Hagelin
Fialka
Nema
Voice
Hand
OTP
EMU
Mixers
Phones
FILL
Codebooks
Algorithms
USA
USSR
UK
Yugoslavia
Ascom
AT&T
Bosch
Datotek
Gretag
HELL
ITT
Motorola
Mils
OMI
Philips
Racal
Siemens
STK
Tadiran
Telsy
Teltron
Transvertex
TST
Spy radio
Burst encoders
Intercept
Covert
Radio
PC
Telex
People
Agencies
Manufacturers
• • • Donate • • •
Kits
Shop
News
Events
Wanted
Contact
About
Links
   Click for homepage
The Keyboard Switch array
The Fialka's keyboard is a rather complex mechanical structure. When pressing a key, one of the 30 switches of the switch array are engaged. The switch array is located behind the keyboard and is part of the drum assembly. The drawing below shows the switch array when seen from the front of the machine. All switches are mounted onto an axle and have one central contact (on top) that can be moved between two static contacts (normally-open and normally-closed). A switch can be engaged by the keyboard, by pushing a metal arm to one of the circular pads at the bottom. As you can see in this drawing, all switches are sorted in the order of the Fialka's alphabet (i.e. in the same order as on the wheels).


The normally-closed contacts are all connected to the Diode Matrix that acts as a 30-to-5 encoder. The normally-open contacts are connected to the input of the card reader. Please note that, although all contacts on the Switch Array are nicely sorted in the order of the alphabet, they are connected in a scrambled manner to the input terminals of the card reader.

Further information
Any links shown in red are currently unavailable. If you like the information on this website, why not make a donation?
Crypto Museum. Created: Wednesday 27 August 2008. Last changed: Monday, 12 October 2015 - 14:34 CET.
Click for homepage