US$ 13.00
energizing spectrum tubes from a 110V source to excite hydrogen
and chemistry procedures
and coil wire with step-by-step assembly instructions
For studying reflection
and commutator function from the inside out
Morse Code Key on Wooden Base with 4mm Terminals Rod Material_Stainless Steel energizing spectrum tubes from aWooden 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.
US$ 13.00
US$ 44.00
US$ 18.00