I have a few of these old power/mate corporation analog needle gauges that i took from some old power supplies. I have a few of the power supplies left as well, and they work a treat, but a couple were broken, and I salvaged them for parts. Mostly just took the pots and the banana connectors, as well as the gauge you see here.
When I hook the back labeled as + - with alligator clips to + and - on a power supply, the meter reads exactly half of the actual potential being put across the meter.
I cranked up the supply till the pictured gauge read 6V, but the supply was putting out 12. And when I put the supply at 6, the gauge read dead on 3.
Is there a way for me to double the reading on the free gauge? This would mean I need to double the voltage across the gauge at a given input.
I'm thinking this is not possible? I'm sort of familiar with the concept of a voltage divider, but from what i understand, you can only use that to have the meter read even less.
But before I removed the gauge from the broken power supply, it had a few resistors, and i think a paper capacitor wired across some off the terminals. Perhaps there is a way to have 6 volts go to the gauge while my supply only puts out 6? Some sort of "voltage multiplier."
Thank you for reading.