repair

Measure Voltage Like It’s 1965

A Leeds & Northrup Model 7556 Guarded Potentiometer from Obtainium Science and Surplus, shown from the front. The vintage gray metal device has multiple black control knobs, labeled dials, and a power cord resting on a textured metal surface.

The Timeless Appeal of the Leeds and Northrup Model 7556 Guarded Potentiometer At Obtainium Science and Surplus, we’re passionate about preserving the legacy of scientific innovation. That’s why we’re excited to showcase one of our most iconic pieces: the Leeds & Northrup Model 7556 Guarded Potentiometer. This vintage precision instrument isn’t just a relic of the past—it’s … Read more