Collectibles > Radio, Phonograph, TV, Phone > Telephones > 1940 69

Bell System Western Electric 20B2 Power Unit




Item History & Price

Information:
Reference Number: Avaluer:4526016Brand: Western Electric
Original Description:
Bell System Western Electric 20B2 Power Unit This is a power supply used in our key button telephonesystems with intercom at the lab I worked at in the late 70s.  It supplies 10, 10, 18, and 24v DC as well as the 105 volt30 Hz ringer pulse. It is clean, no rust or corrosion and is fully functional. Last test date: 1/20/1977. I got it shortly after that.  



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