Author Topic: 20B2 Power Supply - not mine  (Read 236 times)

Offline HarrySmith

  • ***
  • Posts: 6564
  • 1937 302
20B2 Power Supply - not mine
« on: July 08, 2020, 11:30:52 AM »
Someone here was looking for a power supply recently. I do not recall who but there is one on eBay now. Asking $39.99 but taking offers with free shipping! Shipping is usually high since they are so heavy. If you don't get it I will!

https://www.ebay.com/itm/Vintage-Western-Electric-20B2-Power-Unit-Bell-System-RARE/203024445918
« Last Edit: July 08, 2020, 01:32:00 PM by HarrySmith »
Harry Smith
ATCA 4434
TCI

"There is no try,
there is only
do or do not"

Offline RB

  • **
  • Posts: 1426
  • Love old phones
Re: 20B2 Power Supply - not mine
« Reply #1 on: July 08, 2020, 11:37:56 AM »
I have seen those on ebay.
what were they originally used for?

Offline HarrySmith

  • ***
  • Posts: 6564
  • 1937 302
Re: 20B2 Power Supply - not mine
« Reply #2 on: July 08, 2020, 11:52:18 AM »
IIRC they are for powering switchboards.
Harry Smith
ATCA 4434
TCI

"There is no try,
there is only
do or do not"

Offline RB

  • **
  • Posts: 1426
  • Love old phones
Re: 20B2 Power Supply - not mine
« Reply #3 on: July 08, 2020, 12:13:44 PM »
Ah, ok. Never seen one connected...

Offline Babybearjs

  • **
  • Posts: 3092
Re: 20B2 Power Supply - not mine
« Reply #4 on: July 08, 2020, 01:19:13 PM »
they do more than switchboards! mine runs my 1A1 phone system and the 18VAC line also runs the relays on a electric fireplace and windows air conditioner... Plus, the secondary 10 Volt line is used for my homes doorbell circuit! so, hows that for versatility?
John

Offline RB

  • **
  • Posts: 1426
  • Love old phones
Re: 20B2 Power Supply - not mine
« Reply #5 on: July 08, 2020, 03:33:09 PM »
I like that!

Offline Babybearjs

  • **
  • Posts: 3092
Re: 20B2 Power Supply - not mine
« Reply #6 on: July 08, 2020, 07:45:41 PM »
yeh, and the whole house is wired with 25 pair cabling!
John