| DC Trembler bell for use outdoors with 6 inch gong (Bell-gong No's 9, 15
or 15A). Fitted with components to suppress radio interference. Operating minimum voltages
Bell No. 48A - 2.5v (2 x 12.5 ohm coils) - Used for quarterly peg counts.
Bell No. 48B - 50v - (2 x 250 ohm coils)
Bell No. 48C - 50v - (2 x 250 ohm coils)
Bell No. 48D - 50v - (2 x 250 ohm coils) - Superseded Bell No. 48B in 1975.
Bell No. 48C - similar to Bell No. 48B and used for preliminary signal in noisy
situations in PO buildings. This bell uses a Bell-gong No. 19 (cow gong)
and has terminal connections, located above the coils, which allow the coils
to be connected in series or parallel.
The Bell No. 48B contained a Capacitor MC No. 101 whilst only provision
was made within the case of the Bell No. 48D for a Capacitor MC No. 101 to
be fitted subsequently.
Radio Suppression Components:-
2 x Capacitor No. 8001.
1 x Capacitor No. 8003.
2 x Inductor RF No. 15, 1 Amp.
1 x Resistor, Carbon No. 26GC 100ohm.
Width - 6.5 inches.
Height - 13.75 inches.
Depth - 9.5 inches.
Drawing - No. 92190 (Mark 2).
Diagram
- N648.
Specification - S199.
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| Bell No. 48B |
Bell No. 48C |
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