Blue Point YA7707 Test Box

[6PakBee]

I have a Blue Point instrument gauge tester like this one:

Blue Point Tool YA7707 Instrument Gauge Tester - tools - by owner -...

The 100K potentiometer died and I have been going round and round with Snap-On all morning trying to find someone who will claim this that I can get a replacement pot from. There is no vendor marking that I can see on the pot, the following is stamped on the back:

12637
20 9837

Anybody got a source for Blue Point parts? Thanks.

 

[BKCowGod]

Looks like Mouser has a bunch of them to choose from. It's a generic potentiometer, so as long as it fits and you're willing to do some soldering you should be fine. The problems I see are that 1) it may not have quite the same points on the rotation for the same resistance levels and 2) a new unit would probably be cheaper or at least a wash after you factor in time and frustration.
https://www.mouser.com/c/passive-components/resistors/variable-resistors/potentiometers/?q=100k

 

[6PakBee]

Looks like Mouser has a bunch of them to choose from. It's a generic potentiometer, so as long as it fits and you're willing to do some soldering you should be fine. The problems I see are that 1) it may not have quite the same points on the rotation for the same resistance levels and 2) a new unit would probably be cheaper or at least a wash after you factor in time and frustration.
https://www.mouser.com/c/passive-components/resistors/variable-resistors/potentiometers/?q=100k

Good catch! Thank you. The stumbling block I was running into was the minimum resistance. With only two ohms maximum this is a contender. I need to check rotation and we may have a winner.

 

[67Dart273]

Pots have what is called "taper" which means the action of the change of resistance /per amount of change of the knob. "linear" "audio" are two. So getting the panel calibration to match the new pot may be a problem if the taper is wrong, on top of other "general" variables, "quality" being one.

Here:

https://eepower.com/resistor-guide/resistor-types/potentiometer-taper/

 

[6PakBee]

Pots have what is called "taper" which means the action of the change of resistance /per amount of change of the knob. "linear" "audio" are two. So getting the panel calibration to match the new pot may be a problem if the taper is wrong, on top of other "general" variables, "quality" being one.

Here:

https://eepower.com/resistor-guide/resistor-types/potentiometer-taper/

This is a linear taper based on the scale. The criteria I was looking for was rotational sweep, minimum resistance, and tolerance. BKCowGod has given me a good start.