Types AB 670-675
Magneto Wall Telephones
For use on Magneto call and clear systems
For use in extreme conditions
FRAMEWORK, polished walnut, constructed to hold two cells, RK 360 or RK 400 (Old 971 or 586).
MICRO-TELEPHONE. RE 1050 (Old No. 529), with cord RS 6500 (Old No. 2061), resting, on a cradle switch.
GENERATOR. For type and number of magnets see table below.
These generators ring satisfactorily through a line resistance of 25,000 ohms.
RINGER. For resistance see table below.
These telephones have enclosed line terminals and are fitted with a clip for papers.
Height 27.75 inches
|Type||Generator type||Generator Magnets||Ringer resistance||Weight (lbs.)|
|AB 670||RH 4160||4||300||19.4|
|AB 671||RH 4600||4||1000||10.4|
|AB 675||RH 5600||5||2000||20.5|
Telephones AB 671 and AB 675 are provided with a press button for cutting out the ringer coils and short circuiting the induction coil, the button to be pressed down while ringing.
If specially ordered we supply these two telephones without the press button, but with the connections so arranged that the ringer is cut out when the generator is operated.
Taken from the Ericsson Telephone Catalogue 1912
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