Carbon Comp or Carbon Film

wattsup · Post by **wattsup** » Mon Feb 17, 2014 8:27 am

Which is better for D style amps, carbon composition, carbon film or does it matter? Is there a preferred brand and What wattage rating is best?

Structo · Post by **Structo** » Mon Feb 17, 2014 3:22 pm

Dumble used carbon film for most locations, precision metal film on plate resistors.

wattsup · Post by **wattsup** » Mon Feb 17, 2014 3:45 pm

Structo wrote:Dumble used carbon film for most locations, precision metal film on plate resistors.

Is there a general concensus on a preferred brand? What about wattage? 1/2W or 1W in the preamp?

Structo · Post by **Structo** » Mon Feb 17, 2014 4:00 pm

Well most of the carbon film resistors Dumble used are not made anymore.

The Vishay RN65 metal film plate resistors can still be found at places like Mouser.
They are military spec and close tolerance.

http://www.vishay.com/docs/31027/cmfmil.pdf

I think most guys like using 1W resistors for ease of use.
Thicker leads, larger body more robust and some say quieter than their smaller wattage cousins.

I think most guys would be hard pressed to tell the difference between a
Xicon CF and a audiophile grade CF resistor.

You can go exotic as you like on components, but when trying to clone a sound, staying as close to original will give best results.

All the stories and facts are sprinkled through these pages.
One just needs to devote some time and do a lot of reading if
you are truly interested in building a Dumble.

wattsup · Post by **wattsup** » Mon Feb 17, 2014 4:16 pm

Thanks Structo. That ought to be enough to get the ball rolling at least. I want to get as close to the mark as possible - without shelling out he big bucks for NOS parts!

JazzGuitarGimp · Post by **JazzGuitarGimp** » Mon Feb 17, 2014 4:57 pm

There is a similar discussion going on in the Technical Discussion Forum. If you haven't already seen it, go here: https://tubeamparchive.com/viewtopic.php?t=23936
There's some very good general information on this suject there, with many parts suppliers mentioned.

wattsup · Post by **wattsup** » Mon Feb 17, 2014 5:49 pm

JazzGuitarGimp wrote:There is a similar discussion going on in the Technical Discussion Forum. If you haven't already seen it, go here: https://tubeamparchive.com/viewtopic.php?t=23936
There's some very good general information on this suject there, with many parts suppliers mentioned.

That's exactly what I was looking for. Thanks guys this is huge help!

groovtubin · Post by **groovtubin** » Sat Mar 22, 2014 12:34 am

i`m a firm blvr if it sounds good it IS good no matter type used, my best sounding amps are ones where spur of moment, and diversity of components have yielded best results.not for everyone, but hey i`m not everyone! lol!

have fun B4 it`s TOO late!

jim@Omegaamps

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Carbon Comp or Carbon Film

Carbon Comp or Carbon Film

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