Tuning Fork Set of 8 – Welch Type Heavy

Tuning Fork Set of 8 – Welch Type Heavy is an instrument commonly used in school laboratories to generate sound for various experiments.
This set includes eight tuning forks vibrating at specific frequencies: 426.6 Hz (A), 480 Hz (B), 384 Hz (G), 341.1 Hz (F), 256 Hz (C), 288 Hz (D), 320 Hz (E), and 512 Hz (C).
Tuning forks are typically made from a U-shaped steel bar that produces a constant pitch when struck and comes in a velvet box.
They demonstrate concepts such as sound waves, resonance, and vibrations, making them valuable tools in physics and music classes. By using different forks, students can explore sound properties and conduct experiments related to frequency and pitch.

Component/Feature	Specification
Size/Scale Diameter	6 inches (150 mm) or 7 inches (175 mm/178 mm)
Vernier Reading	1 minute of arc (30 seconds also common)
Main Scale	0-360° with divisions of (0.5 circ ) (150 mm or 175 mm circle)
Vernier Scale	Double ended vernier separated by (180 circ )
Collimator Lens	Achromatic, 178 mm focus, 32 mm clear aperture
Telescope Lens	Achromatic, 178 mm focus, 32 mm clear aperture
Eyepiece	Ramsden Type ((10 times ) or (15 times ) with cross-line graticule
Slit	Unilaterally adjustable, 6mm long
Fine Adjustment	Provided for both telescope and collimator (laterally and vertically)
Prism Table	Marked with lines; leveling screws & interchangeable clamp
Main Structure	Heavy cast metal with bright plated fittings (sometimes stainless steel scale)
Accessories	Prism holder, Grating holder, Watchmaker’s eyeglass, L-key, Hardwood case

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