TELEPHONE No. 250


The Telephone No. 250, shown to the right, is a portable linesman's telephone of the local battery variety.  It has an integral battery, ringing generator and a dial.  The telephone can be used on auto lines.

The Telephone No. 250A had a socket that accepted a headset.

The generator handle is stowed by means of the brass clip inside the lid and the mouthpiece was flattened.

The case was made of soft plastic, normally found in a red/brown colour, but some telephones were of a harder plastic and were a mottled brown colour.

Circuit diagram N350.

Click here for the circuit diagram - Web users - CD users

The battery used in the phone is a Battery Dry No. 11.  The voltage is 3 volts.  This is effectively two dry cells in a cardboard container.

The battery container size is 74mm high x 65mm wide by 33mm deep.

 
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Last revised: May 02, 2010

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