[sdiy] how to tell metal film resistors?

[Quincas]

Metal film has different color coding for the value, one extra line to allow for a digit after the period. Check out this page: 
http://www.musicfromouterspace.com/index.php?CATPARTNO=NONE&PROJARG=ELECTRONICS%2FRESISTORS%2FRESISTORS.php%3Fa%3Da&MAINTAB=SYNTHDIY&SONGID=NONE&VPW=1024&VPH=542

Quincas. 


Sent from my iPad

> On 27/04/2015, at 2:26, Roman Sowa <modular at go2.pl> wrote:
> 
> You may try to estimate the tempco.
> Put the resistor in refridgerator for couple of minutes (assuming there's about +5 .. +10 deg.C), then measure resistance. Then hold it in your hand for some time to heat up to body temperature and mesure again.
> Metal film should show about 0.3% difference, while carbon one about 1.5% or more.
> 
> Roman
> 
> W dniu 2015-04-26 o 16:35, Michael Zacherl pisze:
>> Hi, it's a basic question, but actually, I don't know the answer:
>> Say I grab an arbitrary resistor from the mixed parts bin, how can I tell if its carbon or metal film?
>> Or I get resistors from ebay, and want to verify that all is good as ordered?
>> Thanks, m.
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