Bottlehead Forum

Bottlehead Kits => Mainline => Topic started by: AllanMarcus on March 31, 2018, 05:53:08 PM

Title: Carbon film vs metal oxide film resistor?
Post by: AllanMarcus on March 31, 2018, 05:53:08 PM

My mainline kit came with two 100k ohm 3W Carbon film resistors, rather than metal oxide. Is there any chance these two resistors on the C4S boards will make a difference if they were metal oxide?

Title: Re: Carbon film vs metal oxide film resistor?
Post by: adydula on April 01, 2018, 01:07:33 AM

Could you post a pix of them?
Alex

Title: Re: Carbon film vs metal oxide film resistor?
Post by: AllanMarcus on April 01, 2018, 04:07:22 AM

well, I think I might be wrong on the carbon vs metal. I'm not at home, but they look just like this, but say 100 not 10

http://www.electronicsurplus.com/koa-speer-rss3-104j-resistor-mox-100k-ohm-3w-package-of-10

I see now these are likely metal oxide.

I just got thrown because all the other resistors have the colored bands, and these 3W ones do not. It might not be carbon film, but it's different. As a mouth breathing, instruction follower, different is concerning.

So if there is nothing to see here, I will happy solder on.

OK, I am curious as to why these don't have the color bands. Might as well learn something.

Title: Re: Carbon film vs metal oxide film resistor?
Post by: Paul Birkeland on April 01, 2018, 05:57:24 AM

They are just a different brand but the same part.  This particular resistor is not in the signal path either, so brand and type are far less concerning.

Title: Re: Carbon film vs metal oxide film resistor?
Post by: AllanMarcus on April 01, 2018, 05:58:54 AM

Ok, thanks.

Title: Re: Carbon film vs metal oxide film resistor?
Post by: fullheadofnothing on April 01, 2018, 07:21:16 AM

Parts get discontinued.

Sometimes the replacement looks like what is shown in the manual. Sometimes it doesn't.

Title: Re: Carbon film vs metal oxide film resistor?
Post by: adydula on April 01, 2018, 08:51:22 AM

Yup, they are the exact same thing in mine...np.

Enjoy your build!! It goesby too fast!

Alex