10-100kΩ Single Dial Resistance Box Racks & Stands_Test Tube Racks designed to receive real images

designed to receive real images projected by lenses and concave mirrors during focal-length and magnification experiments on the optical bench

this 315x115mm laminated panel carries the appropriate shunt sealed in its molded box on the back of the scale

Moving-coil 4-ohm driver in a frame that orients vertically or horizontally

renal pelvis

10-100kΩ Single Dial Resistance Box Racks & Stands_Test Tube Racks designed to receive real imagesHigher impedance single decade resistance box stepping from 10k to 100k ohms in 10k ohm increments, providing the standard reference decade for op amp input and analog signal path circuit work.