Helmholtz Coil, Specifications: Coil diameter: 295 mm Coil spacing: 150 mm Number of turns per coil: 124 Enamelled copper wire thickness: 1.5 mm DC resistance: 1.2 Ohms each Maximum coil current: 5 A Maximum coil voltage: 6 V Maximum flux density at 5 A: 3.7 mT
Highly evacuated electron tube with focusing electron gun and fluorescent screen inclined relative to the beam axis, so that the path of the beam can be seen and the effects of electric and magnetic fields can be studied.