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School University (1), Spano (2) |
 (2)
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Function Set of instruments for Tesla’s experiments on high frequency. | |||
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Description For Tesla’s experiments we have the following apparatus: a battery of two parallel capacitors with a spark gap with zinc tips. The spark gap is protected by an ebonite turning drum, with lateral opening for the regulation. All the connections are made with a covered and rubberised thick wire and are assembled on ebonite columns. The basis leans on porcelain insulators. The primary of the transformer is made with few turns (10-11) of thick rubberised wire wound around an insulating coil. The secondary is represented by two coils, with different windings, made with tubular cores. | |||
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School Spano |
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Function Demonstration apparatus for Hertz’s experiments. | |||
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Description The model has two 35 cm parabolic mirrors, two plane mirrors, a cohere receiver, a paraffin prism, a grating screen and two metallic screens. | |||
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School Spano (1), Castelvě (2) |
 (1)
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Function Apparatus for initial experiments on the Marconi System of wireless telegraphy. | |||
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Description The apparatus has an historical importance. The transmitter is formed by Righi’s oscillator. The receiver is the metal powder coherer, assembled on an elastic suspension with a relay and an automatic firing pin. | |||
