Apparatus for singing- and speaking-arc experiments from the Max Kohl catalog

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Source: Max Kohl A.G. : Physical Apparatus. Price List No. 50, Vols. II and III. Chemnitz, n.d. [1911], p. 1058.

 

Description on p. 1057:

"Complete Apparatus for Experiments with the Speaking Arc Lamp, F i g u r e on p. 1058,
consisting of:
50,892. Arc Light Hand Regulator (D. C. of at least 80 volts and 10 amps is necessary) 2. 2. 0
63,386. Series Resistance for the Arc Lamp, for connecting to 110--120 Volts 0. 18.0
Or:
63,387. Series Resistance for the Arc Lamp for connecting to 220 volts 2. 0.0
63,388. Self-induction Coil 2.10. 0
63,889. Microphone with Switch and Regulating Resistance 2. 0.0"

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Source information

Type
Image
Author
Year of Publication
1911
Type of Work
Catalog
Place Published
Chemnitz

Categories and filter tags

Areas of Study
Instrument Making
Physics and Mathematics
Instruments and Technologies
Speaking arc