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Northern Electric N1717CG (anti-sidetone local battery magneto wall set)

Started by unbeldi, April 19, 2015, 05:40:42 PM

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Here are the schematics for the Northern Electric N1717CG wall-mounted subscriber set.  This telephone is an anti-sidetone instrument that uses a local battery operated transmitter and a magneto for signaling.

The circuit is in principle similar to the Western Electric 400K subscriber set and the 307 desk telephone.

The components of the N1717CG are:
wood enclosure
104A induction coil
195AN condenser (dual, 1 µF and 0.6 µF)
B1N ringer
41BN hand generator
F1 handset
N1G push-button key
63KN resistance
N143Y switchhook