BELL No. 17


Wooden cased Trembler bell with Bell-Gong No. 5 (3 inch).

Double bell coil - resistance of each coil:-
Bell No. 17A - 50 Ohms - Found in the GPO Rate Book - 1928.
Bell No. 17B - 250 Ohms - Found in the GPO Rate Book - 1928.
Bell No. 17C - 500 Ohms - Found in the GPO Rate Book - 1946 and 1956 - Used on indoors on omnibus call-bell systems when a moderate ring is required and on Fire Systems instead of Bell No. 56B.  Uses Bell-gong No. 5.

GPO Engineering Instructions on Fire Systems

 

 

 
 
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Last revised: May 05, 2020

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