Couterfit DALE resistors?

jmillerdoc · 3rd August 2009, 07:24 PM

Hi,
I recently purchased some Dale resistors on eBay. When I received them they were a little different looking from those bought previously at Digikey. First I noticed the tape on the edges that holds strings together on a reel, did not have the gold colored metal outer coating. Also the resistors were more tapered on the ends where the ones from Digikey had edges with more right angles (i.e. comparing a cigar to an unsharpend pencil)
I have heard of couterfit parts coming from China but I don't think I have seen it until now (I think these are not real). Has any body noticed Dales that looked slightly different from batch to batch or actually gotten some couterfits before? Please let me know what you think. If these are couterfit I would like to know it and at least expose them on the forums. I won't mention the sellers name until I get some kind of confirmation of my suspicion. They do test to 1% variance though, even if they are fake. My concern would be noise level, reliability, and other factors though.
Thanks for your feedback.
Jeff

Magura · 3rd August 2009, 07:45 PM

Easy solution, break a real and an Ebay resistor open, and compare.

Magura

Diomedian · 3rd August 2009, 08:21 PM

Quote:

Originally posted by jmillerdoc
Has any body noticed Dales that looked slightly different from batch to batch or actually gotten some couterfits before?

The only time I've received Dales that looked any different was when I got RN-55s from Mouser. Compared to the CMF-55s I usually get (also from Mouser), they were a slightly more orange colour, and were slightly longer. They didn't test within 1%, however the resistance was 4R99 and I was using a $20 DMM, and I would imagine that I was expecting too much of the DMM rather than the Dales being out of tolerance.

-j

star882 · 3rd August 2009, 11:16 PM

Test one to just within its power ratings for a few minutes. A good one should not fail in any way.

motherone · 3rd August 2009, 11:56 PM

Don't forget that most of the ones you will buy on ebay are going to be NOS resistors that may have been manufactured 10-15 years ago and sitting around in a warehouse.

I've purchased quite a few resistors off of Ebay, including Dales. I've gotten them in all sorts of shades of brown/tan, from dark to the normal looking ones you get at digikey.

I wouldn't be alarmed as long as they test out correctly on your multimeter!

3rd August 2009, 07:24 PM	#1
jmillerdoc diyAudio Member Join Date: Mar 2009 Location: Lawton, OK, USA	Couterfit DALE resistors? Hi, I recently purchased some Dale resistors on eBay. When I received them they were a little different looking from those bought previously at Digikey. First I noticed the tape on the edges that holds strings together on a reel, did not have the gold colored metal outer coating. Also the resistors were more tapered on the ends where the ones from Digikey had edges with more right angles (i.e. comparing a cigar to an unsharpend pencil) I have heard of couterfit parts coming from China but I don't think I have seen it until now (I think these are not real). Has any body noticed Dales that looked slightly different from batch to batch or actually gotten some couterfits before? Please let me know what you think. If these are couterfit I would like to know it and at least expose them on the forums. I won't mention the sellers name until I get some kind of confirmation of my suspicion. They do test to 1% variance though, even if they are fake. My concern would be noise level, reliability, and other factors though. Thanks for your feedback. Jeff

3rd August 2009, 07:45 PM	#2
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	Easy solution, break a real and an Ebay resistor open, and compare. Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

3rd August 2009, 11:16 PM	#4
star882 diyAudio Member Join Date: Mar 2007	Test one to just within its power ratings for a few minutes. A good one should not fail in any way. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

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3rd August 2009, 11:56 PM	#5
motherone diyAudio Member Join Date: Apr 2003 Location: Seattle	Don't forget that most of the ones you will buy on ebay are going to be NOS resistors that may have been manufactured 10-15 years ago and sitting around in a warehouse. I've purchased quite a few resistors off of Ebay, including Dales. I've gotten them in all sorts of shades of brown/tan, from dark to the normal looking ones you get at digikey. I wouldn't be alarmed as long as they test out correctly on your multimeter!

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