Description

Aluminum-cased plotting compass with a glass face and a dial marked with principal points

this decade box selects cascaded values for RC-time-constant

Double-concave glass lens at 3-inch diameter and 200mm diverging focal length

Hand-cranked worm-and-wheel drive with a rotation dial between clear acrylic plates

1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods Aluminum-cased plotting compass with aOne amp AC scale on a 315x115mm laminated panel with sealed shunt, dropping into the demonstration meter as a 0 1A AC ammeter for transformer and household current measurements.

Exchange/Return Notes

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1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods Aluminum-cased plotting compass with a

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