Binding posts Brass vs Copper : does really makes differences ? - Page 5

TB · 30th January 2013, 01:29 AM

Hello diypass,
Brass is an alloy, which consists of copper and zinc. Since we can use different proportion of both brass is not equal to...... brass.

This is good article about it:

Copper.org: Industrial: Design Guide - Conductivity of Brass

Regards

TB

TB · 30th January 2013, 01:48 AM

Also, why to use inferior material? The reason why brass is being used in industry is price. Second factor is its hardness what makes easier to mill or turn in lathe machines.
Copper is soft and second point makes some problems. But, there is always way to go around. I use for the past few years binding posts made by Pomona of Tellurium copper and gold or silver plated. They are not big like ususal WBT, Cardass, Cliff ones, but for average power amps they are fine and cheap:
3770-2 Pomona Electronics | Mouser

I know Mouser is in Europe or search for Pomona. Maybe someone sells it in your country.

SY · 30th January 2013, 02:33 AM

Quote:

Originally Posted by Pallas

IIRC, Jack Hidley had a stock of the Tiff binding posts in his NHT sale. They looked really nice.

That's where I got them. Loaded up my car with all that could fit.

SY · 30th January 2013, 02:35 AM

Quote:

Originally Posted by TB

This is good article about it:

Copper.org: Industrial: Design Guide - Conductivity of Brass

Yes, but... the bulk conductivity is not that important as long as it's reasonably in the metallic range. The resistance from the cables swamps it. The key is contact resistance, and that's where brass does great. You can use more exotic and expensive alloys, but there won't be a real performance improvement. If the mechanics are good, i.e., you can really bolt things down air-tight, you've done everything you can.

Pallas · 02:57 AM

Quote:

Originally Posted by SY

That's where I got them. Loaded up my car with all that could fit.

Ah. Just read through your site about the 3.3's. Cool stuff! (Though I'm way too afraid to use an electric screwdriver around drive-units!)

WAY more interesting than any tedious nonsense about binding post materials.

wrenchone · 30th January 2013, 04:24 AM

Superior Electric makes some nice, beefy gold-plated brass binding posts. The 30A rated ones look nice.

yai · 30th January 2013, 04:57 AM

look here Home | Altoparlanti Intertechnik , they have many different binding posts for cheap, and most of them are made of gold plated brass.

puppet · 30th January 2013, 05:02 AM

Just use bolts made by Johnny B. Good ... dab some dielectric grease on them and your done.

diypass · 30th January 2013, 06:43 AM

Quote:

Originally Posted by yai

look here Home | Altoparlanti Intertechnik , they have many different binding posts for cheap, and most of them are made of gold plated brass.

viewed, but nothing intrest me.

diypass · 30th January 2013, 06:57 AM

some time ago i've bought these :
Dayton Audio BPP-SN Premium Binding Post Pair Satin Nickel - Binding Posts & Plates - Speaker Cabinet Accessories - Loudspeaker Components
Dayton Audio SBPP-SI Binding Post Plate Silver Anodized - Binding Posts & Plates - Speaker Cabinet Accessories - Loudspeaker Components

now to increase quality, i've seen these : CCRR S (Binding Post) that are in full real copper, but i would mount them on an alluminium plate like this :
Dayton Audio SBPP-SI Binding Post Plate Silver Anodized - Binding Posts & Plates - Speaker Cabinet Accessories - Loudspeaker Components
but for cardas i found nothing.
someone could help me ?

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30th January 2013, 01:29 AM	#41
TB diyAudio Member Join Date: Jun 2004 Location: Northern VA	Hello diypass, Brass is an alloy, which consists of copper and zinc. Since we can use different proportion of both brass is not equal to...... brass. This is good article about it: Copper.org: Industrial: Design Guide - Conductivity of Brass Regards TB

30th January 2013, 01:48 AM	#42
TB diyAudio Member Join Date: Jun 2004 Location: Northern VA	Also, why to use inferior material? The reason why brass is being used in industry is price. Second factor is its hardness what makes easier to mill or turn in lathe machines. Copper is soft and second point makes some problems. But, there is always way to go around. I use for the past few years binding posts made by Pomona of Tellurium copper and gold or silver plated. They are not big like ususal WBT, Cardass, Cliff ones, but for average power amps they are fine and cheap: 3770-2 Pomona Electronics \| Mouser I know Mouser is in Europe or search for Pomona. Maybe someone sells it in your country.

30th January 2013, 04:24 AM	#46
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Superior Electric makes some nice, beefy gold-plated brass binding posts. The 30A rated ones look nice.

30th January 2013, 04:57 AM	#47
yai diyAudio Member Join Date: Aug 2011 Location: Jo'berg	look here Home \| Altoparlanti Intertechnik , they have many different binding posts for cheap, and most of them are made of gold plated brass.

30th January 2013, 05:02 AM	#48
puppet diyAudio Member Join Date: Dec 2011 Location: The Dells, WI	Just use bolts made by Johnny B. Good ... dab some dielectric grease on them and your done.

30th January 2013, 06:57 AM	#50
diypass diyAudio Member Join Date: Apr 2012	some time ago i've bought these : Dayton Audio BPP-SN Premium Binding Post Pair Satin Nickel - Binding Posts & Plates - Speaker Cabinet Accessories - Loudspeaker Components Dayton Audio SBPP-SI Binding Post Plate Silver Anodized - Binding Posts & Plates - Speaker Cabinet Accessories - Loudspeaker Components now to increase quality, i've seen these : CCRR S (Binding Post) that are in full real copper, but i would mount them on an alluminium plate like this : Dayton Audio SBPP-SI Binding Post Plate Silver Anodized - Binding Posts & Plates - Speaker Cabinet Accessories - Loudspeaker Components but for cardas i found nothing. someone could help me ?