LugerForum Discussion Forums - View Single Post - Vintage U.S. Army Telephone EE-3-B

mrerick · 11-03-2015, 10:53 AM

Here's detail of the ringing systems used for telephony:

https://en.wikipedia.org/wiki/Tip_and_ring

In the USA today it's about 50 volts. Field phones used up to 130V AC at about 20 hertz.

That is quite a handful!

11-03-2015, 10:53 AM	#16
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,925 Thanks: 1,377 Thanked 3,139 Times in 1,520 Posts	Here's detail of the ringing systems used for telephony: https://en.wikipedia.org/wiki/Tip_and_ring In the USA today it's about 50 volts. Field phones used up to 130V AC at about 20 hertz. That is quite a handful! __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.