G
George Herold
- Jan 1, 1970
- 0
I was killing some time last night before going to my first maker
space meeting, watching some Dave videos.
http://www.eevblog.com/2011/11/08/eevblog-215-gaussian-resistors/
http://www.eevblog.com/2011/11/14/eevblog-216-gaussian-resistor-redux/
In the first video Dave finds that some Philips resistors have a ~
+/-0.5% distribution right around the ‘correct’ value.
In the second he finds that some cheaper (Xicon?) also have a 0.5%
‘spread’, but the average is a bit (~0.35%) lower than nominal.
This raises a bunch of interesting questions.
Do any resistor makers publish this sort of data?
Does buying resistors from a ‘better’ manufacturer lead to resistors
with a better mean.
I use mostly cheap Xicon 1%ers. A few times I’ve gone hunting through
the parts bin with an ohmmeter trying to find some particular value.
Though I don’t have any data I did strike me that the average seemed a
bit low. (When looking for a 10.0k ohm I found many more 9.9X k ohms
than 10.0X k ohms.)
So does anyone know how 1% resistors are made? I find it hard to
believe that they trim each one.
(Do they trim the 0.1% ers?)
George H.
space meeting, watching some Dave videos.
http://www.eevblog.com/2011/11/08/eevblog-215-gaussian-resistors/
http://www.eevblog.com/2011/11/14/eevblog-216-gaussian-resistor-redux/
In the first video Dave finds that some Philips resistors have a ~
+/-0.5% distribution right around the ‘correct’ value.
In the second he finds that some cheaper (Xicon?) also have a 0.5%
‘spread’, but the average is a bit (~0.35%) lower than nominal.
This raises a bunch of interesting questions.
Do any resistor makers publish this sort of data?
Does buying resistors from a ‘better’ manufacturer lead to resistors
with a better mean.
I use mostly cheap Xicon 1%ers. A few times I’ve gone hunting through
the parts bin with an ohmmeter trying to find some particular value.
Though I don’t have any data I did strike me that the average seemed a
bit low. (When looking for a 10.0k ohm I found many more 9.9X k ohms
than 10.0X k ohms.)
So does anyone know how 1% resistors are made? I find it hard to
believe that they trim each one.
(Do they trim the 0.1% ers?)
George H.