The Precise 9071 VTVM, Part 5: Let’s look at the range switch.
Monday, November 2, 2026 at 08:28:16
This unit offers relatively few ranges, so there’s a lot less resistors on this thing than the EICO 249 offered, and these resistors seem to have held up better.
The switch is completely disconnected in the chassis, so it’s time to pull it out.
Here’s the range switch removed.
And the front. Not much going on here.
I’m going to continue removing wires and parts to get this one clean. It will get shot down with some deoxidizing cleaner, then dropped in the ultrasonic bath for a good deep clean.
The resistors on this guy seem to have held up much better than the ones on other devices I’ve worked with. When I tore the EICO 249 down, those resistors changed values quite drastically when hit with a little bit of heat. These red ones seem to be pretty good still. I’ll see what they look like when they are removed, but for now they are almost good enough to reuse. There’s a video on the checkout:
Stay tuned, next part is removing the resistors and cleaning the switch.
Next part of this series: Coming soon.
Previous part of this series: https://wereboar.com … eplacing-some-parts/