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Kovalick

43 karma · joined October 29, 2024

vintage Electro-mechanical telephone systems

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Kovalick··on [dead]

Imagine using relays to emulate a Nvidia GPU. How many?

Kovalick··on [dead]

Starting with telegraph to telephones to first computer.

Kovalick··on [dead]

The relay started in telegraph, then telephone boards then first computer

Kovalick··on [dead]

Alexander G Bell discovered telephony by accident. See how.

Kovalick··on Luck Favors the Prepared-- The telephone was invented by chance

AG Bell wanted to improve the telegraph and invented the telephone by luck.

Kovalick··on Coolest electro-mechanical telephone system

Check out the workings of the Number 5 Crossbar telephone exchange. It was the workhorse of switching for 40 years.

Kovalick··on What was before the telephone bell? Pencils and Hammers

Generating 90 VAC at 20 Hz was a challenge in the early days of exchanges. Check out Calling315.com for more on ringing generators

https://www.calling315.com/ringing-machines

Kovalick··on The evolution of annunciator signaling for telephones

Great point! I will add that to the pages on Annunciators. Thanks for the idea!

Kovalick··on The evolution of annunciator signaling for telephones

I agree with you that electro-mechanical is very cool. Check out Calling315.com for a complete coverage of vintage (relay based) telephone exchanges. The site has 70 articles on switching systems from 1877 until 1970. All for fun...

Kovalick··on The evolution of annunciator signaling for telephones

Jimmy, thanks for the comment-- check out Calling315.com for more on the very early days of how the T and R got started. It was JJ Carty of AT&T (1900) that decided to use Tip and Ring and not a single wire and earth ground from each home.