- Thomann Planetary Tuning Fork Mercury, gold plated - suitable for allergy sufferers, extra long handle for better feel and control, Description: Duration of one orbital period around the sun; Position to sun: 1st planet; Orbital period in years: 0.24; Orbital period in days: 87.969; Orbital period in seconds: 7600522; Frequency calculation: 1/7600522 sec. = 0.0000001316 Hz, (0.0000001316 Hz x 2) 2 pot. 29 = 141.27 Hz; Frequency: 141.27 Hz (= 30. Octave); Tone: C3#; Shifted 440 Hz standard-pitch: A4/a' = 448.50 Hz; Made in Germany
EUR 45.00 - See more - Buy online