Convex lens in brass holder with ball joint attachment to brass stand which itself is attached by ball joint to the base, illuminates microscope objects with use of a side light
Complete with integral lamp, transformer and scale for general purpose use. Sensitivity: 510 mm / microampere; scale from 5 - 0 - 5 in steps of 0.1. In solid wooden box with company logo on the front. Can be used for measuring voltages.
Black cardboard box with a direct drive dial inside wrapped in polythene and tissue paper. Direct drive dial is a large grey metal disc with a scale round the outside from 0 to 190 and a black plastic knob on top. Included in the box is a dispatch…
6 assorted printed circuit boards that accompanied ABDNP201341a, illustrating technology used in 1987. Includes 1 power board with 12 power transistors, relay and piggy-back board, 4 boards approx 230 mm by 290 mm, one including mixed…
Abbe refractometer for measuring the refractive index of liquids in range 1.3 to 1.7. Accompanied by manufacturers manual. Grey painted brass. Stamped M46317/58479 - presumed model and serial number.
modular valve unit (late 1950s?) Black aluminium case with rear connector and valves projecting and covered in screening cans. Counting unit Racal Eng. Ltd. Type no. CU 542 D Ser. No. N1681. 4 valves: 3 off 12AU7/ECC82; ECC82/12AU7
Glass plates forming prism sides can be adjusted independently from vertical to 50 on scale calibrated in divisions of 1 degree. Feet adjustable. Prism mounted above spillage tray (approx 170 mm diameter) on tripod base.
