2600pcs 1% through hole resistor kit - The good, The bad, and the WTF

[buck converter]

THE GOOD:
Resistors came on cut strips, in a nice plastic box, all organized and nicely packaged . Very few strips had bent leads. There were several duplicates of random values 

THE BAD:
5 out of 130 values did not arrive. But i'm probably not gonna need that 47 ohm resistor anytime soon.

THE WTF:
It makes sense this the way to identify the resistance of a resistor in a kit, in order from most to least accurate:

• Measure it with a multi-meter
• decode the color bars on the resistor
• read the value on the strip

I spot checked a resistor that measured 2.2 ohms, colored 1.5 ohms, and strip labeled 1.8 ohms.
Another strip I could not read the label: 6?0K :
    multi-meter read 500k
    color code read 680K

did I receive factory rejects?

[bjcuizon]

Hehe. I ordered 600pcs 1% resistors too for 2 bucks from China. I'll see what I will get once they arrive.

[Whales]

I spot checked a resistor that measured 2.2 ohms, colored 1.5 ohms, and strip labeled 1.8 ohms.

Ignoring the 1.5 vs 1.8, how did you measure the 2.2?

Many common DMM's are pretty useless down in that range.  Try shorting your DMM's leads and measuring that resistance, for example.

[TheSteve]

I bought some 82 ohm 1% resistors from china, so far about 10% of them meet spec.

[buck converter]

shorting leads read 00.



I bought these from Amazon Prime
what is the real disappointment is that I ordered 2 akro-mils drawers to hold it all and I wanted to make a "here in my garage" parody

[bjcuizon]

I spot checked a resistor that measured 2.2 ohms, colored 1.5 ohms, and strip labeled 1.8 ohms.

Ignoring the 1.5 vs 1.8, how did you measure the 2.2?

Many common DMM's are pretty useless down in that range.  Try shorting your DMM's leads and measuring that resistance, for example.

You can also put your meter into relative mode when shorting the leads so that it zeros out (only if your dmm is equipped with such feature).

[John B]

Those cheap massive kits are a total lucky dip. They can be surprisingly accurate, and unsurprisingly inaccurate. 

Mainly its the tolerance, but that's not a huge deal if you're prototyping stuff and are hand selecting values.

I've found they're not 1%, but not quite 5% either. Maybe ~2%.

I also collected some data on their temperature coefficient and kept coming up with a number around -294ppm/deg C.

The biggest hassle is sorting them out, but once you have a filing system, its nice to go to your library of resistors and pick exactly what you want.

Once I even replaced a 3.9 ohm with a 3.6 ohm resistor in a circuit, just went straight to my filing system. What luxury!

[gamalot]

I bought a pack of 1% through hole resistors on Taobao a few months ago, they were very very cheap, and they are accurate.

[ruairi]

I don't know guys, resistor lucky dip is not my idea of a good time. I bought my E96 kits through Digikey and it's been great.

[Brumby]

I bought a cheap pack of 400 a while ago.  They were touted as 1% tolerance and when I started measuring some, I found that the +/- 1% was more like +2%/-0%.

They were fine for me, since I was only after tolerance better than 5%.

[TheSteve]

Just an hour ago I received a reply from the seller that I got my "1%" resistors from claiming my meter must be defective and have errors. Now while that is technically possible I am quite sure it is fine.
I sent them this picture for fun of one of the 82 ohm 1% resistors:

[Brumby]

[bd139]

At least all yours came taped! I got a pack of 2600 0805's that were loose in a bag! Not even taped. Straight in the trash.

[bjcuizon]

Just an hour ago I received a reply from the seller that I got my "1%" resistors from claiming my meter must be defective and have errors. Now while that is technically possible I am quite sure it is fine.
I sent them this picture for fun of one of the 82 ohm 1% resistors:

Hehe, Good one there!

[bjcuizon]

At least all yours came taped! I got a pack of 2600 0805's that were loose in a bag! Not even taped. Straight in the trash.

Maybe it was some rejected parts that were not even given a toss about.

[tszaboo]

"You are obviously measuring it wrong, with a obsolete meter that is not accurate enough for 1% accuracy, does not have a cal sticker and you are holding it wrong. " Nice meter.

I bought a 0805 1% resistor kit, and I measured and it suprised me, because most of the resistors I measured (about 50 individually) were very accurate. I would say almost all of them were .1-.2%. All of them labeled with value.

[Zucca]

my meter must be defective and have errors.

 

He doesn't even know how to manage customer (or use his brain).

[stmdude]

Now while that is technically possible I am quite sure it is fine.
I sent them this picture for fun of one of the 82 ohm 1% resistors:

Dang, dude. Only way that picture could be more perfect is if you had a column of mercury as a reference in the background.

[TheDane]

 
When was your meter last calibrated, and do you have the accredited report?

[capt bullshot]

Just an hour ago I received a reply from the seller that I got my "1%" resistors from claiming my meter must be defective and have errors. Now while that is technically possible I am quite sure it is fine.
I sent them this picture for fun of one of the 82 ohm 1% resistors:

I doubt he gets the point of your picture. Otherwise well done!

[buck converter]

THE GOOD:
Resistors came on cut strips, in a nice plastic box, all organized and nicely packaged . Very few strips had bent leads. There were several duplicates of random values 

THE BAD:
5 out of 130 values did not arrive. But i'm probably not gonna need that 47 ohm resistor anytime soon.

THE WTF:
It makes sense this the way to identify the resistance of a resistor in a kit, in order from most to least accurate:

• Measure it with a multi-meter
• decode the color bars on the resistor
• read the value on the strip

I spot checked a resistor that measured 2.2 ohms, colored 1.5 ohms, and strip labeled 1.8 ohms.
Another strip I could not read the label: 6?0K :
    multi-meter read 500k
    color code read 680K

did I receive factory rejects?

I checked more resistors, maybe 10% of them are beyond 10% tolerance and another 5% are beyond 20% tolerance.

I think I am going to ask for a refund, will see how that goes...

[bd139]

This thread is seriously making me consider just buying a resistor sample kit from a reputable place.

https://www.rapidonline.com/royal-ohm-1-4w-1-122-values-metal-film-kit-62-1504 <-- this sort of doodah.

[TiN]

Just an hour ago I received a reply from the seller that I got my "1%" resistors from claiming my meter must be defective and have errors. Now while that is technically possible I am quite sure it is fine.
I sent them this picture for fun of one of the 82 ohm 1% resistors:

 
However seller might be right too, there is little chance that your calibration is off  .
Can't trust those shoddy volt-nuts with stashes of ebay 3458A's, thinking they are all sitting on gold.

P.S. I bet that scope with hotski Tek7000 ACQ board right next to 3458A also help to get meter hot and outside of the spec  .

[buck converter]

Just an hour ago I received a reply from the seller that I got my "1%" resistors from claiming my meter must be defective and have errors. Now while that is technically possible I am quite sure it is fine.
I sent them this picture for fun of one of the 82 ohm 1% resistors:

 
However seller might be right too, there is little chance that your calibration is off  .
Can't trust those shoddy volt-nuts with stashes of ebay 3458A's, thinking they are all sitting on gold.

P.S. I bet that scope with hotski Tek7000 ACQ board right next to 3458A also help to get meter hot and outside of the spec  .

In my case, the color markings do not match what he labeled, can't beat that!

[TheDane]

No need to spend huge amounts of funds on giant sized dinoaged equipment - a 20 buck ESR tester works great for checking resistors at DC:
https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/

Seems China has trouble delivering quality at the moment, according to page 156 of the topic above.