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Do carbon resistors have any advantages over metal film?
« on: March 03, 2006, 11:25:44 AM »
I usually use metal film resistors since they tend to be lower noise, but is there any application that a carbon resistor gives superior performance? Cost isn't much of an issue, since the price difference between carbon and metal film is insignificant for one-off designs. Are metal film resistors just simply better all around? Thanks!


Gus

Do carbon resistors have any advantages over metal film?
« Reply #1 on: March 03, 2006, 11:39:31 AM »
Check R.G.'s site geofex.com ther is a nice writeup on CC resistors.

bcarso

Do carbon resistors have any advantages over metal film?
« Reply #2 on: March 03, 2006, 01:35:32 PM »
Carbon films are somewhat more resistant to deterioration in the presence of ionic contaminants and moisture.  Otherwise, they tend to have higher voltage coefficients and resistance temperature coefficients.  These may account for their specific "sound" in some circuits.  Carbon composition R's can be quite rugged under pulsed overload.

Above a certain value it is hard to make metal films, but carbon films can be deposited on blanks to make R's about as big as you like, even exceeding 10^12 ohms.

CJ

Do carbon resistors have any advantages over metal film?
« Reply #3 on: March 03, 2006, 02:31:02 PM »
carbon=organic

for that down home sound.  :cool:

are you with me, brutha?

can I get an Amen?

the color codes on a 2 watt carbon comp,  you just can't beat that.
major ebay money
If I can't fix it, I can fix it so nobody else can!
Frank's- www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar- http://tdsl.duncanamps.com/schematics.php

Greg

Do carbon resistors have any advantages over metal film?
« Reply #4 on: March 03, 2006, 02:41:49 PM »
CJ, are you hitting the hooch already?... it's only Friday afternoon.
Greg Stein
New Orleans, LA

CJ

Do carbon resistors have any advantages over metal film?
« Reply #5 on: March 03, 2006, 03:22:53 PM »
"ration"  is a four letter word to me.
If I can't fix it, I can fix it so nobody else can!
Frank's- www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar- http://tdsl.duncanamps.com/schematics.php

bcarso

Do carbon resistors have any advantages over metal film?
« Reply #6 on: March 03, 2006, 04:05:03 PM »
There's no competition with the sex appeal of a shiny Allen-Bradley hot molded carbon comp, I'll give you that CJ.

Although I have a few hermetically-sealed clear glass package metal films with heavy-gold-plated leads from the heyday of cost-plus military contracts, and I hate to use them in circuits, they are so pretty.


 

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