Australian Post Office
This is a magneto telephone imported from the USA in 1948 to cover an shortage of telephones at the time. It was used with boxed magneto Kellogg Type 1205.
MAGNETO TELEPHONE, KELLOGG TYPE 1040 - SERIAL 1, ITEM 139
2. GENERAL DESCRIPTION
2.2 The picture in the Components section of this instruction gives a view of the base plate of the telephone with the components attached and shows the positions of the terminals and connecting Links. A notable feature or the assembly is the ease with which the component parts may be detached from the base plate without disturbing permanent wiring. This is achieved by the use of an interconnecting block wired underneath in busbar form and fitted with sockets for plug-in connections. A view showing the component parts detached from the base plate is given at the end of this instruction.
3. CIRCUIT DIAGRAMS
4. EXTERNAL CONNECTIONS
4.2 Standard battery equipment using two 1.5 volt dry cells should be used connected to the appropriate terminals in the generator box.
5. COMPONENT PARTS AND SERVICE ADJUSTMENTS
5.2 Condensers are provided in the bell circuit and the anti-sidetone network as shown below. The condensers are encased in a single moulding which carries 5 connecting pins for plugging into the connecting block.
5.3 The moulded plastic handset is fitted with capsule type transmitter and receiver insets.
5.4 The magneto bell coils have a total D.C. resistance of 2500 ohms. The adjustment of the armature travel on the bell movement is made by means of a differential screw secured by a locknut which is located between the bell gongs. The gongs are adjusted in the same manner as for a standard bell type 59U.
6. PARTY LINE SERVICES
7. REPLACEMENT PARTS
7.2 Standard equipment is to be used whore practicable. For instance standard 4-conductor line cords and 3-conductor handset cords can be fitted. If a transmitter or receiver capsule is defective the complete handset is to be changed for e standard handset No. 184 and the Kellogg handset should be forwarded to the repair centre and held in a pool for use on other telephones or the same type. In cases where replacements cannot be made readily in the field the defective telephone should be forwarded to the repair centre to be reconditioned. If repairs should prove impracticable the instrument should be held in reserve for supply of serviceable component parts to other instruments of the same type.
Last revised March 31, 2010