hi
has anyone used these before ? the website said they were "pure copper"(probably brass). TBH i cant tell just by looking, and dont know if/how i can test for purity at home.
if you've used these before please share your opinion of them.
gaz
has anyone used these before ? the website said they were "pure copper"(probably brass). TBH i cant tell just by looking, and dont know if/how i can test for purity at home.
if you've used these before please share your opinion of them.
gaz
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Try a magnet. (Copper-color iron is a LOT cheaper and has become very "popular". Trust nobody.)
Apply lemon juice, rinse with water. Fairly good Copper will glow reddish Color.
Find the density of by weighing on scale and volume by displacement ("Eureka!"). Pure copper has a density of 8.92 grams per milliliter.
@davidsrsb I have nothing similar to compare them to.
@prr because they are so small I have no way of accurately measuring such a small amount of liquid. And unfortunately I'm reluctant to do the lemon juice test as I don't see colours very well, also it's not a test of purity.
I'm wondering is there a way of testing purity via resistance and or conductance. I'll do a Google search when I get home later.
@prr because they are so small I have no way of accurately measuring such a small amount of liquid. And unfortunately I'm reluctant to do the lemon juice test as I don't see colours very well, also it's not a test of purity.
I'm wondering is there a way of testing purity via resistance and or conductance. I'll do a Google search when I get home later.
If you got them from somewhere like HifiCollective then maybe the real deal.
If from ebay etc, then probably not so much.
They look the right colour in the photo to be copper (or at least copper clad or coloured), as opposed to brass (don't appear to have the yellowish tinge, and look more red).
You could destructively test them. Even a squeeze with a pair of pliers should mark them easily. Buy an automotive copper oil sump plug gasket (cheap) for something to compare with. Anneal the gasket (heat to cherry red then quench) to soften first.
If from ebay etc, then probably not so much.
They look the right colour in the photo to be copper (or at least copper clad or coloured), as opposed to brass (don't appear to have the yellowish tinge, and look more red).
You could destructively test them. Even a squeeze with a pair of pliers should mark them easily. Buy an automotive copper oil sump plug gasket (cheap) for something to compare with. Anneal the gasket (heat to cherry red then quench) to soften first.
@kodabmx call me a wimp, but i dont fancy putting one into my mouth. besides i've never tasted copper or brass, so how would i know the difference.
@avtech23 i got from aliexpress. i chopped the corner off of one of the tabs that are used to fasten the wire, it was reassuringly soft and the metal was the same all the way through.
gaz
@avtech23 i got from aliexpress. i chopped the corner off of one of the tabs that are used to fasten the wire, it was reassuringly soft and the metal was the same all the way through.
gaz
Gazza, they look identical to these ones from HiFi Collective - a trusted source:
CMC-6005-CUR pure copper, double press-type spade | Hifi Collective
CMC-6005-CUR pure copper, double press-type spade | Hifi Collective
A true audiophile must distinguish a copper from nikkel or alumimium with closed eyes, so... 🙂
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I've stripped copper wire with my teeth, and licked a copper penny when I was younger... I know what copper tastes like 😛
@galu well spotted, hopefully their from the same supplier.
@kateanddad i did cut a bit, its all the same.
@vovk z ha ha ha you first bro 🙂
@kodabmx "I've stripped copper wire with my teeth" again call me a wimp............ 🙂
yea, i'm just gonna whack them onto my cable and see how they sound. if their rubbish, i'll call it a lesson learned.
thanks for your input chaps
gaz
@kateanddad i did cut a bit, its all the same.
@vovk z ha ha ha you first bro 🙂
@kodabmx "I've stripped copper wire with my teeth" again call me a wimp............ 🙂
yea, i'm just gonna whack them onto my cable and see how they sound. if their rubbish, i'll call it a lesson learned.
thanks for your input chaps
gaz
I think they will be fine, even if they are made of steel since 95% of the parts I use have steel (or at least ferrous) leads... It's not a power coupling on the USS Voyager, after all 🙂
definitely not steel.
its just crap that nothing can be trusted anymore quality wise 🙁
live long and prosper kodabmx 🙂
its just crap that nothing can be trusted anymore quality wise 🙁
live long and prosper kodabmx 🙂
That much we can agree on.
"It's a shame when you can't even trust your best friend. They said that they'd be there, but then you can't find 'em anywhere".
Nice to see you got the reference 🙂 And of course to you and yours as well 🙂
"It's a shame when you can't even trust your best friend. They said that they'd be there, but then you can't find 'em anywhere".
Nice to see you got the reference 🙂 And of course to you and yours as well 🙂
Are they Swiss though? Just today I saw some "Copper" RCA connectors on Alibaba that claimed to be Swiss.
Also, I read a post by someone who tested a lot of Chinese / EBay RCA connectors claiming to be copper / tellerium copper connectors which all turned out to be simple brass connectors..
I think the source might be a good lead to whether you can expect it to be what they claim it to be..
Also, I read a post by someone who tested a lot of Chinese / EBay RCA connectors claiming to be copper / tellerium copper connectors which all turned out to be simple brass connectors..
I think the source might be a good lead to whether you can expect it to be what they claim it to be..
If they are copper they cannot be just crimped, note, as they are too soft. They must be crimped (non-agressively!), then soldered. Use the strain-relief part on the wire insulation.
Yes I've seen copper tags like these, they are good for very high current wiring where brass or steel would generate significant unwanted localized heat.
The colour is a dead give away for copper (or copper plated!) Freshly etched copper surface is bright salmon-pink, then as oxide builds up it gets more golden-pink, then brown. Brass is different, a yellowish colour. Beryllium copper is more red/brown (used for spring contacts).
Yes I've seen copper tags like these, they are good for very high current wiring where brass or steel would generate significant unwanted localized heat.
The colour is a dead give away for copper (or copper plated!) Freshly etched copper surface is bright salmon-pink, then as oxide builds up it gets more golden-pink, then brown. Brass is different, a yellowish colour. Beryllium copper is more red/brown (used for spring contacts).