What the Heck is a Uniselector? - Telephone Tuesdays

Today on Telephone Tuesday ‪@hackmodular‬ talks Telephone Switches!
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#vintage #telephoneexchange #restoration #telephony #telephonetuesdays

[@Richardincancale]

The most beautiful selectors I ever saw were made by Ericsson in the 1930s. They were flat with an arm that rotated around covering 25 radial positions, and then outwards by 20 steps giving 500 lines. I saw them still in use in an exchange (switch) in Oulu in Finland around 1993! Lovely mahogany frames too!

[@That-Google-Guy]

I’m loving telephone Tuesdays - can you make a playlist with all of them?

[@sparkyprojects]

I used to install and test crossbar exchanges, i always wondered what they called the 'mini selector' (as i used to know it)

[@KeritechElectronics]

A thing of beauty and a joy for ever, especially if you combine it with a projection readout to make it even more Fran-tastic.

[@BravoBen2007]

C U Next Tuesday - brave sign off 😂

[@GreatGizmo74]

Just my favourite series on the internet!

[@pdrowlan]

Thank you, sir, have a great year!

[@mickcoleman5396]

when I worked in Holborn Exchange '405' (Central London), the group selectors and final selectors were 3000 type, but the code selectors (Director area exchange) were 4000 type. I avoided the 4000 stuff it had a weird principle. Instead of up around and continue around to drop out, they were up, around then to drop out they would go backwards and down...

[@ianhighley-zo3es]

Really enjoying this series, many thanks.

[@jonathanpalmer5505]

Still loving telephone Tuesday. Keep 'em coming 😊

[@roysainsbury4556]

Years ago I obtained an old uniselector, connected it to an old dial so that as I dialled, it stepped. To get it back to the starting point, I used an electronic relay switch that would keep stepping it at fast speed until what I called the "home position" contact told it to stop. It was fun, knowing I had a little bit of a telephone exchange to play with. I still have a tape recording of it operating!

[@weaponofvoice]

Jeez. I didn’t know you had a full on Strowger exchange!

[@markedis5902]

When I started with BT, System X was just coming in. I worked in the repair centre and then for London Payphones changing out all of the loop dis models for nasty plastic DTMF Payphones then back to the payphone repair centre reconditioning coin runways.

[@padders1068]

Thanks Mitch! 🙂😎🤓

[@luketalkin5000]

Relay magic. My favorite!

[@redsquirrelftw]

As someone that works (somewhat) on DMS10, 100, 200 etc it's cool to see this older tech in operation. It's quite before my time so never got to see it.

[@beachsandinspector]

4000 in the UK known as SE50 here in Australia

[@IvanStepaniuk]

Awesome series!

[@uwulydia]

love telephone tuesdays! ☎

[@nneeerrrd]

Love the enthusiasm!