Gerhard Fiedler wrote:

>> John, did you check what the spec says about the temp coeff of your
>resistors? Many are spec'ed with +- ranges, but some are spec'ed with 0...+
>ranges, for example 0...350 ppm/K (pardon me the use of a SI unit here :)
>
>350 ppm/K would be 3.5% over 100 K -- positive. In that case, it would make
>sense that they are a bit below center at room temperature; at least if we
>assume that the target temperature range is mostly above room temperature.
>  
>

No, I did not check that.  Makes sense, though.  I feel sure there is a 
rational explanation.  Although I am going to check the calibration of 
my ohmmeter, I really do not think that it is out of spec because all 
three of them give the same readings.  Which does not mean that they are 
not all reading low, of course, but it decreases the probability.   At 
any rate, I do not want to make a federal case out of it -- just wanted 
to share what I thought was an interesting observation.  (I try to share 
such interesting observations with my wife, but she has developed this 
annoying habit of using the remote control to turn up the volume of the 
TV whenever I try and share such things with her.  :-(

John
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist