Go Back   Home > Forums > Member Areas > The Lounge

The Lounge A place to talk about almost anything but politics and religion.

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 10th September 2013, 06:39 AM   #43271
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
What, exactly?
Parts aren't automatically and necessarily exposed to a lower temp with 63/37.
Don't let parts move around when soldering, whatever solder is used.

Not that I can't be convinced, it's just that, well... it ain't happening yet.
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 10th September 2013, 06:40 AM   #43272
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
You form a joint cleaner, quicker and with less chance of overheating the part or the joint.
  Reply With Quote
Old 10th September 2013, 06:53 AM   #43273
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
Cleaner?
How so?
Quicker?
I'm not in that big a hurry.
Less chance?
The odds don't make it a mountain IMO. Burning up parts and boards isn't that commonplace 'round here.
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 10th September 2013, 07:36 AM   #43274
gpapag is offline gpapag  Greece
diyAudio Member
 
gpapag's Avatar
 
Join Date: Nov 2002
Location: Athens-Greece
Quote:
Originally Posted by Steve Eddy View Post
He didn't say 60/40 was eutectic. He was saying that it isn't and further, it has a higher melting temperature than the eutectic 63/37. That's why he called 60/40 a "stupid" ratio. Did you misread his post?

se
I don’t confront JC as a habit.
Among the words he used to characterise solders, “eutectic” was not included.
I showed some data by which he could make it more “technical”.

George
__________________
["Second Law is a bitch." - SY] ["The Road To Heaven:Specify the performance & accept the design. The Road To Hell:Specify the design & accept the performance"-Bruno Putzeys]
  Reply With Quote
Old 10th September 2013, 09:30 AM   #43275
diyAudio Member
 
john curl's Avatar
 
Join Date: Jul 2003
Location: berkeley ca
Gpapag, I consider quality solder as almost obvious, as I have used SN63 starting 40 years ago, BUT I used to use SN60 starting in 1959, when I made my first Heathkit. I even put together an oscilloscope (Eico) in 1962, and got many years of use out of it, but I was living in ignorance, AND I always had to worry about 'COLD JOINTS' and I got a few, over time.
My introduction to SN63 removed this problem, because the 'plastic region' as it was sometimes called, was virtually eliminated. It made quality soldering more reliable and faster, all for a 3% change in the tin-lead ratio.
What amazes me is WHY they made 60/40 solder in the first place?
SN62 solder adds further advantages, such as an even lower melting point, better wetting, and reduced absorption of gold or silver plated contacts into the solder, because it is already partially saturated with silver.
I have had a nearly 500 page book on soldering (Manko) for the last 30+ years, by my side or on my bookshelf. Photocopying it and displaying it here is a hassle, and I don't feel that I have to baby anyone here with this info directly from the book, since you are all grownups and can find answers for yourself.
What makes me laugh is when FINALLY, SE and I agree on something, it is resisted, or ignored by others. The reason WHY we agree on this is that we are both professionals in getting circuit boards soldered properly, and we have learned to use EUTECTIC solder from hard experience.
  Reply With Quote
Old 10th September 2013, 12:30 PM   #43276
Bonsai is offline Bonsai  Taiwan
diyAudio Member
 
Bonsai's Avatar
 
Join Date: Jul 2003
Location: Taipei, Taiwan
Forgive me asking what must be a dumb question, but WHY are you scraping leads? If you keep your parts in sealed bags with dessicant, they should be 100% solderable after two years - which is what many semi companies spec them at and how they ship 'em also. Ditto passives. I have lots of precision resistors that still solder great after 4 years - no corrosion at all.
__________________
bonsai
Amplifier Design and Construction for MUSIC! http://hifisonix.com/
  Reply With Quote
Old 10th September 2013, 01:38 PM   #43277
diyAudio Member
 
Steve Eddy's Avatar
 
Join Date: Sep 2002
Location: Sacramento, CA
Audiophile neuroticism.

se
__________________
The Audio Guild
  Reply With Quote
Old 10th September 2013, 01:53 PM   #43278
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
Originally Posted by john curl View Post
I haven't used 60-40 (SN60) solder in more than 1/3 century. It is a STUPID ratio.
That depends on the application. For things like tinning of leads (major pun involved there!), the 60/40 is superior because it lays down a thicker coat. For hand soldering, the 63/37 is easier to use to get a good joint. In wave solder operations, the thinner coating of 63/37 outweighs the higher per-pound cost.

Horses for courses, the Ersin and Kester people aren't stupid.
__________________
"The way to deal with superstition is not to be polite to it, but to tackle it with all arms, and so rout it, cripple it, and make it forever infamous and ridiculous."- H. L. Mencken
  Reply With Quote
Old 10th September 2013, 02:48 PM   #43279
diyAudio Member
 
Steve Eddy's Avatar
 
Join Date: Sep 2002
Location: Sacramento, CA
Quote:
Originally Posted by SY View Post
That depends on the application. For things like tinning of leads (major pun involved there!), the 60/40 is superior because it lays down a thicker coat. For hand soldering, the 63/37 is easier to use to get a good joint. In wave solder operations, the thinner coating of 63/37 outweighs the higher per-pound cost.

Horses for courses, the Ersin and Kester people aren't stupid.
What's the particular advantage of a thicker coat on leads?

se
__________________
The Audio Guild
  Reply With Quote
Old 10th September 2013, 02:54 PM   #43280
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
That's apparently preferred for tinning in production situations, increasing solderability (according to my source). The technician-type hand soldering, i.e., the stuff that we all do, is a minuscule segment of the market.

Perhaps it's meant to foil people who insist on scraping leads.
__________________
"The way to deal with superstition is not to be polite to it, but to tackle it with all arms, and so rout it, cripple it, and make it forever infamous and ridiculous."- H. L. Mencken
  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



New To Site? Need Help?

All times are GMT. The time now is 01:52 AM.


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