Resistor Fun

[drteming]

Checking resistors for an upcoming headphone amp build and came across this:

Never seen a Vishay resistor mislabeled or this far off. Please no comments on the shi**y multimeter.

 

[twinrider1]

That is a shitty multimeter.

 

[Red Squirrel]

Maybe it's a capacitor, 6800 farad. That would sure pack a punch.

 

[Naer]

Flux capacitor

 

[lupi]

Did you build the multimeter too?

 

[SOFTengCOMPelec]

Is that a real/genuine resistor ?

http://www.mouser.com/ds/2/427/cmfmil-223788.pdf

Or is it a FAKE/CLONE/EBAY one from China ?

 

[drteming]

Maybe it's a capacitor, 6800 farad. That would sure pack a punch.

I would love to get my paws on some 6800F caps that size (alien technology?). Darwin award?

Did you build the multimeter too?

If I did, I wouldn't own up to it.

 

[Rakehellion]

What is the value supposed to be?

 

[drteming]

Is that a real/genuine resistor ?

http://www.mouser.com/ds/2/427/cmfmil-223788.pdf

Or is it a FAKE/CLONE/EBAY one from China ?

Got it from Mouser.

 

[drteming]

What is the value supposed to be?

680 ohm

 

[PottedMeat]

680 ohm

i'd take the boots off those alligator clips and make sure the wire is soldered to the clip.

 

[drteming]

i'd take the boots off those alligator clips and make sure the wire is soldered to the clip.

It also measured 500 ohm with the regular test leads. The other resistors in the order measured between 674 and 680 ohm (1% as specified).

 

[Markbnj]

Where that multimeter came from ...

 

[PottedMeat]

It also measured 500 ohm with the regular test leads. The other resistors in the order measured between 674 and 680 ohm (1% as specified).

weird. see what mouser does to fix it.

 

[SOFTengCOMPelec]

Got it from Mouser.

In that case, (presumably) it is a VERY rare, faulty or mis-labeled component. Assuming the meter has read the resistor value correctly.

I believe there is a 499 Ohms value version, which this may have got mixed up with on the production line, by mistake or something.

Or they could even be (VERY rare) fakes, which have entered the (apparently genuine) supply chain ?

If you are worried, you could try contacting mouser ?
(But best to confirm with another multimeter and/or use a known resistor value and check it reads about the correct value, first).

 

[drteming]

In that case, (presumably) it is a VERY rare, faulty or mis-labeled component. Assuming the meter has read the resistor value correctly.

I believe there is a 499 Ohms value version, which this may have got mixed up with on the production line, by mistake or something.

Or they could even be (VERY rare) fakes, which have entered the (apparently genuine) supply chain ?

If you are worried, you could try contacting mouser ?
(But best to confirm with another multimeter and/or use a known resistor value and check it reads about the correct value, first).

I have confirmed it with another multimeter. The cheapo meter was handy when I took the picture. I've been using Vishay RN resistors for years and had never come across anything like this. I got more resistors coming from Mouser. I'm keeping this unicorn for my collection.

 

[Brian Stirling]

Mislabeled, it happens...


Brian

 

[Red Squirrel]

Vishay is a pretty well known brand for precision resistors IIRC, did all of them measure bad or jsut that one? Could very well be some odd mix up or defect. If you bought from Mouser/Digikey I doubt the fake stuff would make it there. At least I would hope not.

 

[SOFTengCOMPelec]

Mislabeled, it happens...


Brian

Vishay is a pretty well known brand for precision resistors IIRC, did all of them measure bad or jsut that one? Could very well be some odd mix up or defect. If you bought from Mouser/Digikey I doubt the fake stuff would make it there. At least I would hope not.

I agree.

I was jumping onto the "fake" band wagon, because (originally), I did not know where they were purchased. (So thought ebay etc, was possible).

Since it is from a reliable source, it is much more likely it is a mistake, rather than fakes.

I have confirmed it with another multimeter. The cheapo meter was handy when I took the picture. I've been using Vishay RN resistors for years and had never come across anything like this. I got more resistors coming from Mouser. I'm keeping this unicorn for my collection.

Yes, it is a bit like receiving a $1 bill, with a serious mistake, but which is GENUINE.

They can be worth a fortune to some collectors!

 

[Howard]

Still might be a fake even from Mouser. Lot of suppliers have had (have) issues with counterfeit ICs.

 

[who?]

Somebody probably picked it up off of the floor and put it into the wrong container before the labeling process. Maybe they were cleaning up quick before the boss came through.

 

[drteming]

I think it's a mislabeled part. I would expect a counterfeit part to be off-spec by a couple of percentage points, but not that far off.

My goodness, what kind of nerd am I to be all excited about a weird resistor.

 

[twinrider1]

As you can see in this video, resistor manufacturing is super high tech and errors are impossible.

https://www.youtube.com/watch?v=C8mc6bKKkJQ

 

[Ichinisan]

As you can see in this video, resistor manufacturing is super high tech and errors are impossible.

https://www.youtube.com/watch?v=C8mc6bKKkJQ

Yes. Quite impossible!

 

[drteming]

As you can see in this video, resistor manufacturing is super high tech and errors are impossible.

https://www.youtube.com/watch?v=C8mc6bKKkJQ

Ha! I've used TE Connectivity branded resistors that were made in India. They were actually quite good, though they looked hand made. And they were. I'll put up a picture later when I get home.

[edit]

They were on the line output of an amp that I built.[/edit]