Modern alternatives
PowerDsine
Ringer,
Electronic No. 3A
Ringing, Generator No.
2A
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| Converters Ringing No. 1 Input - 250 volt ac
Output - 66 volts ac 16.6hz
Drawing - CD385.
Introduced in 1943.
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| Converters Ringing No. 2 Input - 250 volt ac
Output - 66 volts ac 16.6hz
Dimensions - 10.2" x 8.2" x 5.25"
Drawing - CD365.
Diagram - N642.
Introduced in 1943.
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| Converters Ringing No. 3 Input -
200-250 volt ac
Output - 75 volts ac 16.6hz
Dimensions - 10.2" x 8.2" x 5.25"
Drawing - CD817.
Diagram - N643.
Specification - S372.
Supersedes Converters, Ringing No. 1.
Superseded by Converters,
Ringing No. 6.
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| Converters Ringing No. 4 Input -
200-250 volt ac
Output - 66 volts ac 25hz
Will ring up to about 4 bells.
Output is continuous.
Dimensions -
12" x 5" x 6"
Drawing - CD1316.
Diagram - N651.
Specification - S559.
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| Converters Ringing No. 5
Input - 200-250 volt ac
Output - 66 volts ac 25hz
Will ring up to about 20 bells.
Output is continuous.
Dimensions -
19" x 7" x 6"
Drawing - CD1317.
Diagram - N652.
Specification - S560.
The Converters Ringing No. 5 is the larger of the two in the picture.
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| Converters Ringing No. 6 Input -
200-250 volt ac
Output - 66 volts ac 25hz
Will ring up to about 60 bells.
Output is continuous.
Drawing - CD1318.
Diagram - N653.
Specification - S561.
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| Converters Ringing No. 7
Input - 200-250 volt ac
Output - 66 volts @ 25hz
Will ring up to about 1 bell.
Output is continuous.
Dimensions -
3" x 4.5" x 4"
Drawing - CD1539.
Diagram - N654.
Specification - S609.
The Converters Ringing No. 7 is the smaller of the two in the picture.
This Converter is intended for wall mounting or for mounting inside
certain Power-Units e.g. PU No. 52A or PU No. 62A.
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| Converter Ringing No. 9A
Used when an external extension is fitted to a
Planset N625
Click for more information Drawing -
91851 and SA10071.
Diagram - N626.
Specification - S843.
Includes Cover No. 73A.
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| Converters Ringing No. 10A This is a
transistorised ringer used on 50volt lamp signalling cordless
switchboards.
To ring 1 or 2 Bells No. 59A in series with a 2uF capacitor.
Input - 50v DC.
Output - 40v @ 25c/s.
Dimensions - 4.5" x 3" x 3.25"
Drawings - CD188, CD1673 and CD2763.
Diagram - N676.
Specification - S665.
The Mark 2 version was introduced because of the need to replace the
germanium transistors by silicon transistors.
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| Converters Ringing No. 11A Transistorised
ringer that was used on the PMBX No. 4.
Will ring up to 12 bells.
Input - 50v DC.
Drawing - 92333.
Diagram - N682.
Specification - S682.
The Mark 2 version was introduced because of the need to replace the
germanium transistors by silicon transistors.
Introduced in 1965.
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| Converters Ringing No. 12A Transistorised
ringer that was only used on the PMBX No. 4 in conjunction with Convertors, Ringing No.
11A when more than two Switchboard positions were installed.
Will ring up to 12 bells.
Input - 50v DC.
Drawing - 92334.
Diagram - N683.
Specification - S585.
The Mark 2 version was introduced because of the need to replace the
germanium transistors by silicon transistors.
Introduced in 1965.
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| Converters Ringing No. 13A
Transistor ringer for P.A.B.X. Nos. 5 and 7.
Input - 50v DC.
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| Converter Ringing No. 15C Used when
more than 4 bells are used on a line.
These were sold for installation by the house holder.
Click here for more information
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| Converter Ringing No. 17A Used as a
general ringer.
Output is 90vac @25hz
Made by PAB, their name was the Ringer,
Electronic No. 3A.
Installation Guide
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