Identifying tempcos

Fraser, Colin J Colin.Fraser at scottishpower.plc.uk
Tue Nov 9 17:27:09 CET 1999


> -----Original Message-----
> From: Doug Tymofichuk [mailto:dougt at cancerboard.ab.ca]
> Sent: 09 November 1999 15:40
> To: synth-diy at mailhost.bpa.nl
> Subject: Identifying tempcos
> 
> With all this talk about tempcos, I am wondering if I might 
> encounter some when salvaging equipment. As I have never 
> actually seen one, I wonder if there is any way to 
> physically identify them. Do they have any unique markings 
> or anything to show what they are? Or do they just look 
> like any other resistor?

One sure way to spot a temperature sensing device will be that it is in
close thermal contact with another device, typically an IC or multiple
transistor, and there will likely be some white heat conductive grease
about.

Other than that, they tend to look like large wirewound resistors.


Colin f



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