Lead vs. Silver solder - Page 13 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 18th January 2013, 10:42 AM   #121
Telstar is offline Telstar  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: Italy
Quote:
Originally Posted by tinitus View Post
any idea why it looks like this
Not cleaned flux? (wild guess)
__________________
"The total harmonic distortion is not a measure of the degree of distastefulness to the listener and it is recommended that its use should be discontinued." D. Masa, 1938
  Reply With Quote
Old 18th January 2013, 10:48 AM   #122
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Telstar, thats what I said...
Quote:
Copper was added as a tip saver
It aint realy added for any other reason...

You very rarely get copper pins thery are always have a finish on them for components, and if you are soldering wire you tin it first.

Last edited by marce; 18th January 2013 at 10:53 AM.
  Reply With Quote
Old 18th January 2013, 10:59 AM   #123
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Quote:
Most PCB have tinned pads, therefore any solder containing tin (=all of them) will bond. I think zero issues are also caused by gold-plated pads (they have the advantage of not oxidizing over time, which is the main cause of bad solder joints).
As ENIG is one of the most popular finishes for SMD boards (ie the majority of baoards manufactured) and has been for a long time I would take that as a given. Though due to the price of gold other finishes are gaining in popularity including ENIPIG, immersion silver and some of the newer OSP finishes with a longer shelf life such as ENTEK® PLUS HT.
  Reply With Quote
Old 18th January 2013, 10:59 AM   #124
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by Telstar View Post
Not cleaned flux? (wild guess)
what you see is corrosion
so if you mean the flux remains is acid that slowly eats its way through to the copper ...
Attached Images
File Type: jpg IMG_8249.JPG (172.8 KB, 112 views)
  Reply With Quote
Old 18th January 2013, 11:01 AM   #125
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
Quote:
Not cleaned flux? (wild guess)
Not so wild. It does look to be that the board components were installed cleanly, then the AC cord and transformer were soldered and left messy.
If the mess is only on the surface the board should be salvageable.
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 18th January 2013, 11:03 AM   #126
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
There is no such thing as a no clean flux if you want reliability, flux residue can be reactivated in hot humid conditions and ruin the board. Always clean the flux off.
The troubleis that it is an extra production operation socosts money.
  Reply With Quote
Old 18th January 2013, 11:27 AM   #127
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
cleaning makes it look almost ok
though reveals bad soldering
and looking closer you will notice a scarred and badly perforated surface
Attached Images
File Type: jpg IMG_8270.JPG (278.4 KB, 103 views)
  Reply With Quote
Old 18th January 2013, 11:27 AM   #128
diyAudio Member
 
Join Date: Dec 2009
Location: UK
I only use lead free stuff and have never had an issue(both hobby and professionally). You just need to adapt the process a little.


Marce, there are a number of no clean fluxes available, which are used for high reliability applications.
  Reply With Quote
Old 18th January 2013, 11:32 AM   #129
Telstar is offline Telstar  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: Italy
Kester makes some no-clean that seems superb on paper.
If someone wants to get 1kg to try it...
__________________
"The total harmonic distortion is not a measure of the degree of distastefulness to the listener and it is recommended that its use should be discontinued." D. Masa, 1938

Last edited by Telstar; 18th January 2013 at 11:35 AM. Reason: Found what to say
  Reply With Quote
Old 18th January 2013, 11:42 AM   #130
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Quote:
Originally Posted by Telstar View Post
I heard bad reports about soldering simplicity with the one with copper, but if you have used for years and the new roll is exactly the same brand and model, why not? Was it Ersin multicore brand perhaps?
The other one, just make sure is Eutectic (it seems so since you posted a single temp melting point).

Besides this, it shouldn't have any inpact on sound, the conductivity of silver is just a bit more.
Never had any problem with it. I think when I bought it I didn't even notice at first it had copper in it. It was an Australian brand I think, OEM'ed to Dick Smith electronics. The one at Element14 is not the same brand.

The later comments about being a tip saver seem valid. I wasn't sure if copper was added due to most component leads being copper, I thought it may improve the bonding. Certainly my Tin ears would not be able to hear any difference between different types of solder! any considerations I have are more for getting a better solder joint and longer term reliability (though I guess that both of those could result in audible differences)...

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lead Free Solder Recommendations and Procedures mhconley Construction Tips 7 19th June 2009 06:04 AM
3.5% silver solder sangram Everything Else 2 24th February 2006 09:29 AM
Lead free solder bigwill Equipment & Tools 11 12th May 2005 05:30 AM
Lead Free Solder Mike Gergen Parts 12 24th September 2004 04:41 PM
Lead free solder djmiddelkoop Parts 13 24th January 2004 05:52 PM


New To Site? Need Help?

All times are GMT. The time now is 11:10 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2