A rubber ring mounted on a metal disc with steel rod and wooden handle
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Nickel-plated, plain shanks, with frequency marked, C (256), D (288), E (320), F (341), G (384), A (426), B (480), C (512). Complete set of EIGHT tuning forks, supplied in case.
Highly sensitive, good quality with rubber tubing, useful for observing faint sounds and vibrations after due amplification
Slotted metal disc, with finger hole and having 12 radial slots, mounted on a handle.
This unit provides continuously variable D.C outputs for the ripple tank motor, together with a fixed A.C output to operate lamp, supplied with a detachable mains lead.
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