Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Copper RCA connector
Copper RCA connector
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th February 2018, 09:33 PM   #1
Roo2 is offline Roo2  Australia
diyAudio Member
 
Join Date: Jan 2016
Location: Brissy
Default Copper RCA connector

Hi,
I'm looking for a pair of female RCA panel jacks for the inputs to my AlephJ pass amp. Pure copper (OFC) appears to be a good option but most options appear expensive. I found the attached. I guess its possible the seller may be creatively using the word "copper" and they could be brass.. Anyway, two questions:
1. The attached photo doesn't show a ground lug. How would you connect the ground to this particular jack?
2. Can anyone suggest an alternative RCA jack that really is copper (not brass) and isn't expensive?
I understand the copper base metal needs to be plated for corrosion resistance, usually gold.
Thanks
Attached Images
File Type: jpg s-l1600.jpg (88.9 KB, 340 views)
  Reply With Quote
Old 17th February 2018, 08:33 AM   #2
scottjoplin is offline scottjoplin  Wales
diyAudio Member
 
scottjoplin's Avatar
 
Join Date: Dec 2015
Location: Penrhyndeudraeth
Hi,
For high current the conductivity of copper may be important, at low signal levels quality of contact is the priority
  Reply With Quote
Old 17th February 2018, 08:48 AM   #3
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
diyAudio Member
 
JonSnell Electronic's Avatar
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
Copper is not strong enough for a connector.
Cheap fleabay connectors are steel plated with gold or copper.
Better quality are brass and professionals use Neutrik; Phono (RCA) Chassis Connectors - Neutrik
Nickel plated with gold.
__________________
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
  Reply With Quote
Old 17th February 2018, 08:58 AM   #4
scottjoplin is offline scottjoplin  Wales
diyAudio Member
 
scottjoplin's Avatar
 
Join Date: Dec 2015
Location: Penrhyndeudraeth
I use Rean from Neutrik, which are nice
  Reply With Quote
Old 17th February 2018, 09:05 AM   #5
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Yes, copper is too soft and so will make a poor connector. I am going to guess that OFC copper will be particularly soft and so particularly useless for this application. It is unlikely that you will be able to buy such an item, as nobody should be daft enough to make one.

I can see two ground lugs on those connectors.
  Reply With Quote
Old 17th February 2018, 08:35 PM   #6
Roo2 is offline Roo2  Australia
diyAudio Member
 
Join Date: Jan 2016
Location: Brissy
Thank you all. The Neutrik ones with the socket look like a good option.
  Reply With Quote
Old 17th February 2018, 09:26 PM   #7
rayma is online now rayma  United States
diyAudio Member
 
Join Date: Apr 2011
Quote:
Originally Posted by JonSnell Electronic View Post
Copper is not strong enough for a connector.
Tellurium copper is used for high quality connectors, and is nearly as machinable as brass.
Binding Post, Low Thermal Emf. Tellurium-Copper, Gold-Plated | Pomona Electronics

Last edited by rayma; 17th February 2018 at 09:35 PM.
  Reply With Quote
Old 2nd September 2019, 01:37 PM   #8
zalive is offline zalive
diyAudio Member
 
Join Date: Aug 2019
I bought recently couple of RCA sockets (from the OP) on fleabay, and I can confirm those are made of gold plated brass. Besides they're really massive.

Majority of manufacturers use (thicker) nickel plating underneath gold plating. Apparently it gives the gold that shiny look but it's not the best for audio.

Even WBT Nextgen 0210 Cu RCA sockets use bronze plating underneath thin (0.4 micron) gold plating. Only 0210 Ag RCA's are compromiseless in this respect - the only thing which is not silver in its signal part is bronze spring for the signal pin, which is obviously necessary for longevity reasons. There's a brass nut version, but it's disconnected from the signal path.

ETI Research FR-TC07 RCA sockets declare they don't use nickel or bronze or brass in the signal path. However they don't specify gold is directly plated on tellurium copper body - so it's possible they use some other in-between plating metal option which they hide. There's a brass nut, but it's disconnected from the signal path as well.

These two are probably best quality RCA socket options available; however I'd like if there was a cheaper option built on similar principles (tellurium copper or silver, low mass of signal conductor). However I see no similar female RCA from the Star Line, while Elecaudio produces tellurium copper RCA's, but unfortunately they use nickle plating as well.

Any suggestions? Any knowledge of other quality without compromise female RCA's, except less priced than WBT or ETI?
  Reply With Quote
Old 2nd September 2019, 02:11 PM   #9
davidsrsb is offline davidsrsb  Malaysia
diyAudio Member
 
Join Date: Dec 2005
Location: Kuala Lumpur
Quote:
Originally Posted by rayma View Post
Tellurium copper is used for high quality connectors, and is nearly as machinable as brass.
Pure copper jams the machining tools because it is too soft, so i would require a non standard and expensive production method
  Reply With Quote
Old 2nd September 2019, 03:36 PM   #10
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
As I understand it, adding tellurium to copper will
1. make it more radioactive - but not dangerously so
2. make it more toxic - but not dangerously so
3. make it harder and so easier to machine and more durable
4. reduce conductivity - but not enough to do harm to an audio signal
Note that better audio performance is not a factor.
  Reply With Quote

Reply


Copper RCA connectorHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Copper plating with acid copper sulfate. Osvaldo de Banfield Construction Tips 17 19th September 2016 01:54 PM
WTB: Harmonic Tech Cyber-Link Copper or Digital Copper cable reaction Swap Meet 1 2nd July 2010 10:50 AM
Can I use 4-pin Molex connector as speaker connector? MikeHunt79 Everything Else 5 3rd June 2009 07:21 PM
Copper heatsink tweak - Thermaltake Copper Heatsinks Ruach Digital Source 16 23rd September 2006 10:59 PM
Finished my DIY Copper foil speaker cable, what connector to use? Guijs Everything Else 4 19th October 2005 10:31 PM


New To Site? Need Help?

All times are GMT. The time now is 10:53 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki