Electronics > Projects, Designs, and Technical Stuff
Panel Meter Ref. Pots
rdl:
Ceramic alignment tool/screwdriver.
First Amazon hit when I searched as an example, there are others:
https://www.amazon.com/Hanperal-Slotted-Ceramic-Alignment-Screwdriver/dp/B01AJC29OI
"ceramic screwdriver" on ebay.
https://www.ebay.com/sch/i.html?_nkw=ceramic%20screwdriver
I may order a set just to have them around.
engrguy42:
Okay, problem solved... :D
I only had to do a few repeats of the "turn everything off, tweak the pot, turn it on and see what you get" cycle, and now my V and I pots are dead nuts on.
Sometimes the simplest is the best. :D
schmitt trigger:
--- Quote from: engrguy42 on April 18, 2020, 11:14:10 am ---
Or maybe the folks here can't be associated with a cheap $10 panel meter? :D
--- End quote ---
Of course not. Once that one becomes aware of its limitations, they are perfectly good monitor meters.
My experience when these drift, is because the open frame nature of its trimpots. The resistive element might also be cheap carbon film instead of the better tempco of cerment.
A simple upgrade is to remove these cheap trimpots and replace it with a good sealed cermet. A multiturn type is even better.
Of course, these can cost almost as much as the meter in the first place! But it is a simple and very significant improvement.
Navigation
[0] Message Index
[*] Previous page
Go to full version