[GreenKeys] Another question for old Bell System guys

[Doug Alderdice]

At 10:26 AM 12/16/2008 -0500, Larry Tighe wrote:
>Where did the 130 VDC come from?  I've only seen the huge 48 VDC battery 
>banks and the 80-120 VAC 20 cycles for ringing.  I do remember 130 VDC for 
>the coin collect/return relays in payfones...did it come from inverters???


I was told by a former #5 XB tech that the 130 VDC coin battery came from a 
bank of the big telephone dry cells, at least in the office he worked in.

Doug A.