Johnson Rahbek electrostatic telephone

Johnson Rahbek electrostatic telephone with motor and controlling potentiometer

Details

Category:: Telecommunications

Object Number:: 1926-286

type:: telephone

credit:: Swinton, Alan Archibald Campbell

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Parts

Johnson Rahbek Electrostatic Telephone

Object Number:: 1926-286/1

type:: telephone

Controlling Potentiometer

Object Number:: 1926-286/2

type:: potentiometer

Johnson Rahbek electrostatic telephone

Details

Parts

Johnson Rahbek Electrostatic Telephone

Controlling Potentiometer

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