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DIY Cable Gallery!! - Page 866

post #12976 of 14090
Quote:
Originally Posted by FraGGleR View Post

RCA plugs are not meant to be plugged and unplugged over and over and have the ground sleeve as security when connecting.  This allows them to have pure copper or silver for the signal conductor.  For 1/4" and 3.5" plugs, the most common connectors on this thread and used for headphone cables, there are no pure copper or silver connectors available.  This is primarily due to the fact that pure copper and silver are too soft.  Brass or  bronze with gold or nickel plating are necessary to withstand both the number of plug/unplugs and provide the structural rigidity necessary for these types of plugs.

Also, a good number of DIYers make cables to save on costs, especially in this thread it seems.  Triple digit plugs don't usually come into play.

3.5mm plugs are almost always gold plated because gold doesn't corrode anywhere as easily as copper, not because other materials are too soft.
post #12977 of 14090
Quote:
Originally Posted by cerealkillr View Post


3.5mm plugs are almost always gold plated because gold doesn't corrode anywhere as easily as copper, not because other materials are too soft.

I think you are confusing the plating material with the construction material.  I have spoken with connector manufacturers and pure copper and silver are too soft and difficult to machine to such tight tolerances.  A friend of mine and I wanted to make an uber mini, but the best any manufacturer can do is phosphor bronze.

post #12978 of 14090

I think this is misleading. it appears everything has a brass base or some brass in some part of it. copper and silver are simply too soft. there are a few rca's,spades etc that have direct copper contacts and they are very expensive. not to mention probably very fragile. I can see those getting all chewed up. copper is not so expensive, there is a reason they use brass for connectors apparently. I figured a copper base would be better. not better if it fails. I can also see why this is certainly not used for 1/4" phone jacks. I guess I was misinformed until I read up on it. copper may be a better conductor but there are other considerations in this application as well. the truth is the electricity is traveling on the plating anyways. it takes the path of least resistance of course.

post #12979 of 14090

Pure copper will also corrode, starting at the surface where you make contact with the other connectors, which is bad obviously.

 

Quote:

Originally Posted by music_man View Post
 

the truth is the electricity is traveling on the plating anyways. it takes the path of least resistance of course.

 

Yes and no... electricity follows all paths simultaneously, but diverts proportionally along the paths of least resistance. The plating may technically have a higher conductivity, but it is so thin that its actual resistance is high compared to the bulk material underneath it.

post #12980 of 14090
Quote:
Originally Posted by music_man View Post

the truth is the electricity is traveling on the plating anyways. it takes the path of least resistance of course.

I think that also depends on the conductor area. E.g. with a very thin gold plating on a brass body, most of the electricity would be flowing through the body as that has as much greater conductor area. For high MHz and GHz signals the skin-effect would come into play, and the current would indeed be concentrated near the surface of the conductor.
post #12981 of 14090
I see Armaegis just beat me to it. wink.gif
post #12982 of 14090

well I read into the marketing hype that brass is bad. something like a rca or banana could not even have enough force if it were solid copper or silver base.certainly not a phone jack.

post #12983 of 14090
Quote:
Originally Posted by music_man View Post

well I read into the marketing hype that brass is bad. something like a rca or banana could not even have enough force if it were solid copper or silver base.certainly not a phone jack.

What have you read (or inferred) about brass being bad? There are many types of brass, including nickel-silver which is very hard (doesn't actually contain any silver) and has an electrically conducting oxide (hence the model railroading folks use it for their tracks).
post #12984 of 14090

Sennheiser HD 438 with custom remote for samsungs wired as per this schematic: http://forum.xda-developers.com/showthread.php?t=2146965

post #12985 of 14090
Quote:
Originally Posted by FraGGleR View Post
 

I think you are confusing the plating material with the construction material.  I have spoken with connector manufacturers and pure copper and silver are too soft and difficult to machine to such tight tolerances.  A friend of mine and I wanted to make an uber mini, but the best any manufacturer can do is phosphor bronze.

Ah, didn't realize that. You're right.

post #12986 of 14090

like wbt,eichman,furutech etc talk about how their more expensive connectors have no brass,nickle etc. anyways I really wanted some pure copper direct silver plate connectors for diy cables. turns out bb/magnolia has some audioquest offerings in the $30-$50 range. much less than the ones I just mentioned. oh, that price is for 4 rca's or bananas. I don't know if they are better but they say they are. if you are going i'd call first.

post #12987 of 14090

You don't think they have brass in them? I'd be surprised if there weren't just plated brass like most connectors on the market.

post #12988 of 14090

Your "music" has already traveled through aluminum, copper, silver, brass, nickel, tin, solder, steel, silicon, carbon, metal oxides, various electric fields and magnetic fields, and maybe even through a vacuum, and more, all before it got encoded into binary. Then in the digital domain it was stretched, squashed, chopped, layered, shaped, and generally molested in all sorts of unspeakable ways. This all happened before you've received it in its "pure" form.

 

So yeah i guess what i'm trying to say is a Au/Ni plated brass mini plug isn't an issue for headphones or line level applications that we might use it for. Any really critical connector application (that needs high power or tiny contact resistance) won't be using a 3.5mm mini.

 

For connector materials in general, I generally like to keep the male and female plating materials the same where possible. So silver-silver, gold-gold, nickel-nickel, etc. Its not absolutely critical though.

post #12989 of 14090

I was bored so I chopped up my Shure SE215 FiiO cable and put on my CKS55. I didn't feel like using premium stuff on such a cheap IEM.

 

post #12990 of 14090

i know it does not matter. i just like to pretend it does. to that end you guys have built some really snazzy cables here.

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