BUZZER No. 19
The Buzzer No. 19A was used in large workshops etc.

Trembler type.

Coil resistance - 0.55ohms.

Buzzer No. 19A is operated by a battery of two small secondary cells, which are kept charged by a battery of five WK1 Leclanché cells connected to them by a resistance of 100 ohms.

Buzzer No. 19B is powered by a 10 volt supply generally being mains charged.

This Buzzers name was changed to the Hotter No. 1 in 1956.
 
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Last revised: September 27, 2026

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