BUZZER No. 21
This buzzer was used on Telephones Intercom No. 1 & No. 2, Metering-Unit No. 2A  and fitted inside Plugs No's 2404A & 4001A.

Coil resistance - 50ohms + 4ohms + 1000NI.

Ericsson Part No. N3341.

How to adjust the Buzzer No. 21
 
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Last revised: September 22, 2024

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