Hi,
I have been away from DIY for a wile. Used to use the light brown colour Dale Metal film resistors in the past which were decent at reasonable price.
Recently, I want to build a simple 3-ways Analogue Signal Processor. Bought Some Dale CMF55 1/2 w resistors from Mouser and Digikey. However, three of the many values got are in light blue and are made in CZ republic ( the other values I got are all light brown made in USA same as those I used years ago).
I used a magnet to test the light blue CZ made one and found out that they are magnet attracted to magnet ( possible at the end caps).
I want to get the light brown ones which are non magnetic. So, I buy the three values again from Digikey. I enquired Digikey before I place the order to ensure that the three types ( values) I selected are made in the USA. However, once I receive them , still, one of the three values I got is in light blue made in CZ with same magnetic properties. They are near the same manufacturer code number.
I am too frustrated and not sure how I can get the light brown ones. Emailed Digikey but received no response.
Not sure if fellow DIYers have similar experience. Whether the RN60 versions are still made in the USA in light brown and are non magnetic? If they are, I will pay a bit more to get the RN60 versions.
Appreciate if you could share your experience or information.
Thank you very much
I have been away from DIY for a wile. Used to use the light brown colour Dale Metal film resistors in the past which were decent at reasonable price.
Recently, I want to build a simple 3-ways Analogue Signal Processor. Bought Some Dale CMF55 1/2 w resistors from Mouser and Digikey. However, three of the many values got are in light blue and are made in CZ republic ( the other values I got are all light brown made in USA same as those I used years ago).
I used a magnet to test the light blue CZ made one and found out that they are magnet attracted to magnet ( possible at the end caps).
I want to get the light brown ones which are non magnetic. So, I buy the three values again from Digikey. I enquired Digikey before I place the order to ensure that the three types ( values) I selected are made in the USA. However, once I receive them , still, one of the three values I got is in light blue made in CZ with same magnetic properties. They are near the same manufacturer code number.
I am too frustrated and not sure how I can get the light brown ones. Emailed Digikey but received no response.
Not sure if fellow DIYers have similar experience. Whether the RN60 versions are still made in the USA in light brown and are non magnetic? If they are, I will pay a bit more to get the RN60 versions.
Appreciate if you could share your experience or information.
Thank you very much
CMF series all moved production as of May last year.
See attached PCN;
Citing "No influence on quality or reliability is expected", yet they are now magnetic (at least the ones we have received are). They have gone from a tan colored pill shape, to a light blue colored dog bone shape. Seems like a completely different product now.
Some of the slower moving SKUs may still be the old style now but the faster moving ones are well into the new batches. Want a guaranteed old style one, grab the non RoHS version.
Also note the power levels on the datasheet inside the PCN were erroneously decreased, for example to 400mW from 600mW for the CMF55, which mouser rightly followed. Now a lot of the mouser loaded power ratings on all the CMF are lower than the actual part rating. The CMF datasheets have been revised since this PCN to include the correct power levels, and they are catching up.
I think the RN series are still unaffected (but for how long?), and the ones I have here that I ordered in the last couple weeks are non-magnetic just like the old CMF, (and I didn't seek out the -143 suffix parts as the datasheet implies).
See attached PCN;
Citing "No influence on quality or reliability is expected", yet they are now magnetic (at least the ones we have received are). They have gone from a tan colored pill shape, to a light blue colored dog bone shape. Seems like a completely different product now.
Some of the slower moving SKUs may still be the old style now but the faster moving ones are well into the new batches. Want a guaranteed old style one, grab the non RoHS version.
Also note the power levels on the datasheet inside the PCN were erroneously decreased, for example to 400mW from 600mW for the CMF55, which mouser rightly followed. Now a lot of the mouser loaded power ratings on all the CMF are lower than the actual part rating. The CMF datasheets have been revised since this PCN to include the correct power levels, and they are catching up.
I think the RN series are still unaffected (but for how long?), and the ones I have here that I ordered in the last couple weeks are non-magnetic just like the old CMF, (and I didn't seek out the -143 suffix parts as the datasheet implies).
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Thank you, Rama, for the advices. Note that the Vishay Dale CMF has a non magnetic line with - 143 suffix. They are relatively far more expensive and Mouser has limited value on this linen.
My post above is referring to the normal CMF line which was in light brown and will not be attracted by a magnet ( though they do not bear the -143 suffix).
I got quite a few values of these brown Vishay Dale CMF resistors not attracted to a magnet but only 3 values sub batch of them ( bearing the same Vishay Dale code #) are in light blue and can clearly be attracted by a magnet. All these light blue one are made in CZ.
Also, thank you, Mainframe, for sharing. Indeed, it is said that they loved the production to CZ using some sort of different materials that is attracted by a magnet. All these different Vishay Dale resistors with COO from CZ are light blue. Probably, they are the new batches. When the old brown ones are depleted, they may be gone forever.
So, I think I better order the RN series, which should be in light brown, when they are still available, still made in the USA and are not attracted by a magnet.
These information would be valuable for those want to order new Vishay Dale resistors.
Thank you all again for sharing.
My post above is referring to the normal CMF line which was in light brown and will not be attracted by a magnet ( though they do not bear the -143 suffix).
I got quite a few values of these brown Vishay Dale CMF resistors not attracted to a magnet but only 3 values sub batch of them ( bearing the same Vishay Dale code #) are in light blue and can clearly be attracted by a magnet. All these light blue one are made in CZ.
Also, thank you, Mainframe, for sharing. Indeed, it is said that they loved the production to CZ using some sort of different materials that is attracted by a magnet. All these different Vishay Dale resistors with COO from CZ are light blue. Probably, they are the new batches. When the old brown ones are depleted, they may be gone forever.
So, I think I better order the RN series, which should be in light brown, when they are still available, still made in the USA and are not attracted by a magnet.
These information would be valuable for those want to order new Vishay Dale resistors.
Thank you all again for sharing.