Morse Code Key on Wooden Base with 4mm Terminals Subcategory_Electricity and Circuits sized to protect a pair

sized to protect a pair of 50mm (2-inch) bar magnets between lessons and isolate them from steel benchtops

Mid-decade capacitance box stepping 1nF to 10nF in 1nF increments at plus-or-minus 5% on 63V

sized for low-resistance Ohm's-law work where high-resistance components don't draw measurable current

Battery-or-mains low-frequency generator producing sine

Precision-cut interchangeable plugs in split brass contact blocks select between constantan-wire decades

Morse Code Key on Wooden Base with 4mm Terminals Subcategory_Electricity and Circuits sized to protect a pairWooden base Morse code key with a black knob, two adjustment screws on a spring loaded aluminum bar, and 4mm wire terminals, dropping into the Worcester Circuit Board Kit for telegraph work.