Wave from Helix (Slinky)

Mounted on sturdy streamlined base with provision for horizontal or vertical use, fork is manufactured from selected steel. Prong is 10 x 25 x 300 mm. accurate frequency adjustment, vibrations rate 60 per second. Electromagnet can work on 6 Volts. The amplitude of vibration can vary by sliding the electromagnet inside the prongs.

Overall length when fully extended is about 840 mm approx., 540 mm when closed, stoppered, and made of varnished wood with movable piston marked with the chromatic scale from C (256) to (512)