Author Topic: Russian phone dialler device using core rope memory as configuration UI  (Read 816 times)

0 Members and 1 Guest are viewing this topic.

Offline mikeselectricstuff

  • Super Contributor
  • ***
  • Posts: 11405
  • Country: gb
    • Mike's Electric Stuff
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
Day Job: Mostly LEDs
 

Offline NivagSwerdna

  • Super Contributor
  • ***
  • Posts: 1458
  • Country: gb
Re: Russian phone dialler device using core rope memory as configuration UI
« Reply #1 on: January 19, 2018, 12:01:27 am »
"To enter a number in the accessory memory a single wire has to be threaded through 7 rows of ferrite rings in accordance with the table on the inside of the appliance’s cover."

That's brilliant.  So it is configurable by re-wiring through the cores. Superb.
 

Offline Kalvin

  • Super Contributor
  • ***
  • Posts: 1683
  • Country: fi
  • Embedded SW/HW.
Re: Russian phone dialler device using core rope memory as configuration UI
« Reply #2 on: January 19, 2018, 12:22:26 am »
Try to make a call to a cellular phone or to another operator network :)
 

Offline Bruce Abbott

  • Frequent Contributor
  • **
  • Posts: 602
  • Country: nz
    • Bruce Abbott's R/C Models and Electronics
Re: Russian phone dialler device using core rope memory as configuration UI
« Reply #3 on: January 19, 2018, 02:43:51 pm »
In New Zealand we used a similar technique to upgrade electromechanical telephone exchanges to STD (Subscriber Toll Dialing) in the 1980s. To 'program' the calling subscriber's number into the system we would feed a wire through several levels of ferrite rings, one level for each digit.  A tone was sent through the wire and the rings acted as current transformers, producing voltages that were detected and operated relays which encoded the phone number (used to bill the subscriber for the toll call).

I helped install this equipment into the Hastings (NZ) telephone exchange. The rings were mounted on iron racks that went from floor to ceiling and (literally) weighed a ton. We had to unpack them before hoisting up to the 1st floor of the exchange. Two of us were holding onto opposite ends of a crate while another jemmied it open. He got a bit too keen and pushed it over. I could feel the weight was too much so I jumped back and the rack crashed to the ground on its back, bending all the pins flat against the rings. We installed it just like that because bending the pins straight again would probably break them off. Luckily no ferrite cores were broken in the fall!     
 

Offline Canis Dirus Leidy

  • Regular Contributor
  • *
  • Posts: 57
  • Country: ru
Re: Russian phone dialler device using core rope memory as configuration UI
« Reply #4 on: January 23, 2018, 04:28:49 pm »
Here are few more photos of this device: http://www.retrotexnika-forum.ru/talk/viewtopic.php?p=827
 

Offline dexters_lab

  • Supporter
  • ****
  • Posts: 1713
  • Country: gb
    • DextersLab2013
Re: Russian phone dialler device using core rope memory as configuration UI
« Reply #5 on: January 23, 2018, 06:51:30 pm »
really interesting thing, funny how different countries can come up with novel ideas like this

there are some very nice items in their ebay store!
"A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools." - Douglas Adams
http://www.youtube.com/user/DextersLab2013
http://dexterslab2013.blogspot.co.uk/
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf