Bad resistors

"Jan Panteltje"

Dozens of resistors colour coded as 3.3kohms were in fact 4.7 kohms.

The correct value WAS 4.7 kohms - so the equipment maker knew about the wrong coding !!

.... Phil

Wrong.

First you assume that the actual value of the part is as marked. Then you are apparently unaware of the error spec on your own meter, and then you are unaware of environmental error introductions, which happen in EVERY case.

You lose, again.

I am quite confident that you are unable to utilize that tool properly either. You are also likely unaware of its declared specs as well.

You are full of s*it.

For the intelligent out there, don't worry, the world hasn't changed and such readings are still impossible to make accurately at the bench or in the field.

You're an idiot.

You think.

Best response to this thread I have yet seen.

Now try a battery of parts that are all between 2 Mohm and 20 Mohm.

I'll bet your claim falls apart at that point.

You cannot move the goal posts, twit.

The bands can change color, especially with age or heat.

Or it could have been a batch of mismarked resistors that the equipment maker got for cheap

I have a pair of Fluke test leads that when measuring high resistance I'll get a low reading if the leads are touching each other, though nowhere near what you're seeing, perhaps about 5% error. I'd also check your resistors on another meter for verification.

Yes, don't worry. AlwaysWrong is AlwaysWrong.

AlwaysWrong and unbelievably stupid as usual.

I'd (heh) smack you, but s*it splatters.

Still, you'd expect it to give the same wrong reading for the same resistances.

Sylvia.

Or just fed strips out of the 4.7K box into the machine that loads components onto the board, and never noticed that they were marked as 3.3K.

Sylvia.

On a sunny day (Tue, 22 Jun 2010 16:54:15 -0700) it happened DrParnassus wrote in :

In fact this is a common mistake in thinking Say if your meter has a max of 2 MOhm, and you want to measure 2M7 resistors, then how to do that? It is easy, you put 2 in parallel, and that should read 1M35.

I have often argued against buying YAOEPOE (Yet An Other Expensive Piece Of Equipment), as we have (well OK not everybody equal amounts) brains to tackle simple problems. hehe

On a sunny day (Wed, 23 Jun 2010 19:28:15 +1000) it happened Sylvia Else wrote in :

Exactly, and teh righ treading for correct ones. And 620 k is not even in that E series, it is 560k 680k.

Maybe I can sell these on Ebay for a minimum of 1000$ to somebody, just like rare stamps? Any takers at 1000$?

On a sunny day (Tue, 22 Jun 2010 18:43:30 -0700) it happened DrParnassus wrote in :

John Larkin posted photo and diagram of a device to do just that here a few days ago? Why do you not stop arguing and get a basic electronics education? Building some circuits could help too.

On a sunny day (Tue, 22 Jun 2010 23:21:20 -0700) it happened DrParnassus wrote in :

Impossible for those who have high vacuum between their ears.

On a sunny day (23 Jun 2010 01:11:40 GMT) it happened Jay Ts wrote in :

I already had some 'correspondence' with them on other failing material. they are of my list as supplier. I had these in stock, hardly ever use those high values. I normally order from conrad.nl. I see it as my right to point out my experiences with things bought. You must be aware that the damage is not just a few cents for a resistor, but also the time it takes to trace the problem. Nobody is gona send 10 resistors back. I am just doing a public service pointing out the bad. F*ck any company that disagrees with that, if they sue me I have these as proof, unless somebody actually bust them at the 1000$ I ask as starting bid :-)

On a sunny day (Tue, 22 Jun 2010 21:52:53 -0400) it happened Spehro Pefhany wrote in :

Dunno.

On a sunny day (Wed, 23 Jun 2010 15:00:49 +1000) it happened "Phil Allison" wrote in :

Yes I can understand that. But 2M7 -> 620k is not even in that E series (560k 680k 820 k).