B.T.H. variometer crystal set

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B.T.H. variometer crystal set
Science Museum Group
© The Board of Trustees of the Science Museum

B.T.H. variometer crystal set, made by British Thompson Houston Co. Ltd in 1922; in wooden cabinet 11 1/2 x 5 x 8 1/4 ins. Serial no. R774, type C

Details

Category:: Radio Communication

Object Number:: 1969-315

type:: variometer

credit:: Epton, W.

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B.T.H. variometer crystal set

Details

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