Tayda is a great source for cheap parts, however, I seem to be noticing a trend. When I test my “1%” resistors, they seem more like 5% resistors, pretty consistently, across multiple values.
I’m not against 5% resistors, they’re fine most of the time - but I don’t like being told they’re 1% when they’re really 5%.
Do other people observe the same thing?
I was measuring several Royal Ohm 120k and 10k resistors recently:
120.8
121.3
120.4
121.0
120.7
121.1
121.0
…
10.00
10.01
10.00
9.99
10.00
9.98
10.07
10.03
9.99
Both biased to higher resistance than nominal (that could be the DVM I suppose) but with spread well under 1%.
Here’s what I’m getting… I measured some 0.1% precision resistors first that I had leftover from the 1222 build just to check that it’s not my meter…
Precision 10k (0.1%)
9.97
9.95
9.97
9.98
10.0
9.97
Royal Ohm 10k (1%)
9.98
9.94
9.99
9.96
10.02
Royal Ohm 100k (1%)
92.8
97.0
94.9
94.7
93.4
The 10k’s were good, better than advertised even, but the 100Ks are averaging worse than 5% out-of-spec. These were out of a batch of 1000 that I ordered and I measured random resistors out of the tape.
I sent a complaint and never heard a peep back.
I ordered a new batch and these are well in spec.