DAL 1101 (replaces AE 270)
This intermediate device is used when two telephones are connected to the same line. The one device - the intermediate device - has a three-way switch, through which line is switched. The other device - the extension - is a common telephone for LB systems.

Line L1 is connected to the public network and line connection L2 is connected to the extension. When the switch is set to position 1, the intermediate device is connected to the line L1.  In position 2, the intermediate device is connected to the extension on line L2.

When the switch is placed in the middle position, the line L1 is connected to the extension.

The intermediate device has a cover of black lacquered sheet metal. The wall mounted bellset contains a polarized ringer.

As end devices can be used e.g. DAH 1101, DAH 1102, DAL 1001, DAN 1001 and DAN 1002.

The device can be mounted using a DYY 1001 shelf on wall.

For each device, two BKA 1002 batteries (1.5 Volts each) are required or BKA2002. Suitable battery box for these is BKY1001.

Parts:
Microtelephone RLF 1020 made of black Bakelite with microphone capsule RLA 1004, 40ohms, and string TRS 1404, 1250mm, transformer REK10105.
Generator RGH 1402
Generator RGL 1005.
Ringer of 1000ohms, consisting of: mechanism KLA 1004.
Bell gong low tone 0-4951.
Bell gong high tone 0-4952.
screws for bells G2 Cl M05,
Three-way switch RT 16604.
Line cord TRS 1802, 1250mm.
Wall bracket made of black lacquered sheet metal with ringer of 1000 ohm, consisting of: mechanism KLA 1064, bell gong with low tone 138 543/l and bell gong with high tone 138543/3.

Dimensions:
Height 272mm, width 233mm, depth 150mm.

Weight 6.5 kg.
 

Taken from the L. M. Ericsson Catalogue No. 610 (1939) - Swedish Translation

Circuit diagram - 228540.

Last revised: June 07, 2024