This compact telephone is made to withstand the arduous conditions of service in the field as a linesman's testing set or temporary station. The strong, light steel casing is partly pressed up and partly fabricated by welding, rust proofed and coated with a hard baking stove enamel.
Adequate protection of the vital parts is ensured, both during transport and when the set is open for use. The woven fabric adjustable strap is attached by swivel links and has loops for carrying an earth spike.
P.V.C. insulated wire is used for the internal connections.
The equipment includes a moulded handset with press key, anti-side-tone induction coil, capacitors, alnico generator of about 3 watts output, 2000 ohm ringer and, in a neoprene-lined compartment seen at the back centre in the illustration, two dry cells (inert cells are supplied for the tropics). An adapter is available for insertion in the battery compartment to enable two standard cylindrical 1.5 volt torch batteries, 13 in. dia. to be used, instead of the rectangular type N3774 (N3775 inert) normally provided. Orders should specify type of battery required.
The generator handle is stowed vertically for transport, and turned down for use, being held in either position by a spring-loaded slide on the crank.
Taken from the Ericsson catalogue, edition No. 55
AUTO, CB OR MAGNETO
This robust portable telephone has been primarily designed for use as a
linesman's testing set but can also be employed as a temporary station. Three versions of
the telephone are available for connection to:
Main Design Features
The dial, handset, alnico generator, 2000 ohm ringer mechanism, anti-side tone induction coil, capacitors for receiver and bell circuits, two batteries, a plunger key and terminal block are all contained within the case.
Swivel-link fasteners retain an adjustable, woven-fabric, shoulder strap provided with loops for carrying an earth spike when required.
A special light weight waterproof telephone with terminals for extra receiver is
available for CB and Magneto working.
N1845 introduced 1946.
Taken from the Plessey Telephone Catalogue (1971)
Last revised: October 04, 2019