An EICO 950A R-C Bridge Part 1: Observations - What did they do to you?
Thursday, March 26, 2026 at 11:53:59
This is an EICO 950A Resistor-Capacitor Bridge. It offers the things you’d expect from such a device. It’s odd in that it slots in-between the 950 and 950B, which were traditional EICO silver-face units. Not this one:
This one features EICO’s colorful scheme, much like the 145 signal tracer I wrote about a couple of years ago. It has comparator and leakage functions in addition to the standard R-C measurements. Leakage is provided by a neon bulb under a pilot jewel in the upper right corner, an unusual bayonet bulb that someone replaced with a standard #47 pilot, probably because they didn’t realize that it wasn’t working because it only lights when you’re using it…not when you turn it on.
The cabinet has seen some use and abuse.
Rusty Bottoms is playing this show tonight:
Even the inside is rusty.
The chassis shows a similar amount of rust. This thing had a wet, hard life.
That aside…let’s look at the inside.
Jay Hooks makes a lot of appearances here.
The underside, however, is “Mah boi, what did they do to you?”
Everything has j-hooks. Everything. Parts. Wires. Everything. ~~Why???
Exactly what was the previous owner trying to resolve here? Was the thing on fire? It amazes me this thing worked at all, especially with those capcitors flying around with no insulation. With all the wires being j-hooked to other wires…it’s like the person just replaced everything for no reason than to replace it.
I’m going to take this challenge, but I need to get a schematic first. I’ll look for one…stay tuned. Hopefully we can make this device a bit happier.