DAS 1101 (replaces the AB 129)
Devices with a Laryngaphone are intended to be used in premises where disturbing noises occur, such as e.g. in engine room, power plant etc, where it would be impossible to make calls with a normal handset.

This device has a box made of dark veneered oak. Earphone- the lids have rubber pads. The Laryngaphone is provided with a special microphone, which is easily pressed against when speaking the larynx. The vibrations of the larynx when speaking over is taken directly to the microphone diaphragm, which is not affected of sounds coming from outside. Speech is reproduced cleanly and clear. Two dry batteries elements are required for each device BKA 1002 or BKA 2002. Suitable battery box for these are BKY 1001.

Parts:
Laryngaphone RLH 1102 made of black Bakelite with microphone capsule RLA 8001, 40ohm and rubber hose cord TRS 2402, 1500mm.
Extra earphone RLD 2102 made of black Bakelite with Rubber hose cord TRS 2201, 1500mm.
Transformer REK 10 105.
Generator RGH 1301.
Generator crank RGL 1004.
Ringer of 1000ohm, consisting of: mechanism KLA 1004.
Bell gong with low tone 138 543/2.
Bell gong with high tone 138543/4.

Dimensions:
Height 218mm, width 166mm for the bottom of the device plate

Weight 4.9 kg.
 

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

Last revised: March 25, 2024