gleanerl
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Posts: 97
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Post by gleanerl on Jun 26, 2023 10:44:55 GMT -6
Wondering if any of you tech savy guys know where one could buy a potentiometer. Vishay Spectrol 157-129A 06. 1K +/-10%. L+/-2% 1108 are the numbers on it. Haven't been able to find it online. Likely new number now. Dealer price is $435.00. Online they seem to be $25-$50, so why not cut the plug off the old one and solder it on new.  |
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Post by kenmb on Jun 27, 2023 7:36:08 GMT -6
Haven't done anything elaborate with potentiometers, mainly use them for a variable resistor in test circuits. So that one is 0 to 1000 ohms. The +/-2% is for inductance (L) which I never had cause to consider, it's the first time I have seen inductance noted so can't say if it is relevant. There will be a wattage rating but basically the physical size of the unit will determine wattage rating so without a wattage spec I would simply go with something of similar physical size.
So I would measure the threaded shaft diameter, the diameter of the body and start looking in electronic websites for a 0 to 1k ohm pot. Then hook it up and see if it works.
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gleanerl
Junior Member
Posts: 97
Likes: 95
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Post by gleanerl on Jun 27, 2023 10:01:20 GMT -6
Haven't done anything elaborate with potentiometers, mainly use them for a variable resistor in test circuits. So that one is 0 to 1000 ohms. The +/-2% is for inductance (L) which I never had cause to consider, it's the first time I have seen inductance noted so can't say if it is relevant. There will be a wattage rating but basically the physical size of the unit will determine wattage rating so without a wattage spec I would simply go with something of similar physical size. So I would measure the threaded shaft diameter, the diameter of the body and start looking in electronic websites for a 0 to 1k ohm pot. Then hook it up and see if it works. Thanks for the reply kenmb. 8 Watts was mentioned in info I was reading about diagnosing fault. It has been my thoughts as well to buy 1K and proper shaft size and try it. E-mailed the company and just received back that they are looking into it and will get back to me. |
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gleanerl
Junior Member
Posts: 97
Likes: 95
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Post by gleanerl on Jun 27, 2023 13:45:16 GMT -6
Just as expected. " This part is active however, it is proprietary design. A letter of Authorization is required before we go further. You may contact CNH directly to request the authorization letter. Then, once authorization is in place contact Vishay franchise distributor to provide pricing."
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Post by kevlar on Jun 27, 2023 16:27:47 GMT -6
Boooooo. 👎👎👎👎👎
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Post by Beerwiser on Jun 27, 2023 22:31:13 GMT -6
Try mouser or digikey and do like you said and cut the plug off and solder it to the new one.
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Post by kenmb on Jun 28, 2023 7:00:51 GMT -6
My guess is there is nothing special about it electrically in design, I can't see an inductance value being a parameter of concern. So the proprietary design is likely physical like in how the connection is made. Perhaps Case had them build the potentiometer with a specific plug to make for easy interface with wiring used on equipment. Let's say Case had an existing wiring harness in production and needed to offer a new potentiometer to update/upgrade an original unit and figured it was easier to get the new potentiometer manufactured with the specific plug. Or could be Case wanted a 100% sealed design with an added degree of sealing. Hard to say. But I would personally get whatever pot that looks like it will fit and then give it a go. I expect it will work fine. I will bet wattage rating won't be an issue in the design but provided a guy stays with the same basic body size then you will cover that aspect.
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gleanerl
Junior Member
Posts: 97
Likes: 95
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Post by gleanerl on Jul 4, 2023 17:25:23 GMT -6
Potentiometer arrived today. Ordered a few extra, good thing because there are two involved in the system. Hot wired them in, to see if they'd work. Seems as though they will. I think the trick is going to be to get them adjusted together properly to work full range of movement. 32c feeling close to 40 with humidity so with the volume of sweat pouring off of me I decided this project could wait for a cooler day. With a bit more time it may be a good $50 spent.
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