DIY Audio Projects Forum
 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

DIY Audio Projects Forum

Welcome to the DIY Audio Projects Message Forum. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. Registration is free and required to post messages and view the file attachments. Registration will only take a minute and registered users do not see any advertisements. After you have completed the online registration process, check your email (including spam/junk folder) for the verification email to activate your account. New members are under moderation - so your posts will not be visible until approved by a moderator. See the Read Me 1st, Forum RULES and Forum FAQ to get started on the forum.

It is currently 23 Jan 2018, 15:12

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Solder has a shelf life?
PostPosted: 01 Oct 2013, 13:54 
Offline
Moderator
User avatar

Joined: 02 Sep 2008, 14:34
Posts: 527
Location: Rochester, NY
From the Kester Data Sheet for SN63PB37 58/285

"Storage, Handling, and Shelf Life:
Storage must be in a dry, non-corrosive environment. The surface may lose its shine and appear a dull
shade of grey. This is a surface phenomena and is not detrimental to product functionality. Flux cored solder
wire has a limited shelf life determined by the alloy used in the wire. For alloys containing > 70% lead, the
shelf life is two years from date of manufacture. Other alloys have a shelf life of three years from date of
manufacture."

The DOM on the roll I am using is 5/26/04. What would you'll do?

_________________
Cheers, Alan
.
Denon POA 2200 | Bottlehead Quickie with PJCCS | Integra CDC 3.1 | SOTA Sapphire-RG301-Grado Gold 1 | Soundwave Soliloquy Series I


Top
 Profile  
 
PostPosted: 01 Oct 2013, 14:53 
Offline
Project Author
User avatar

Joined: 04 Jun 2008, 20:59
Posts: 3510
Location: Arizona, USA
Hi, First I have heard of this, but does make some sense. Solder never lasts that long here. I use up a pound or two every year. As for using the stuff you have....if it seems to work I would go ahead. If you seem to have trouble making it flow properly then pitch it.

Good listening
Bruce

_________________
Some of my DIY Tube Amplifier Projects:


Top
 Profile  
 
PostPosted: 17 Feb 2014, 01:08 
Offline

Joined: 11 Oct 2011, 19:39
Posts: 195
I had a roll of chemtronics solder from back in 1985 that I found and used recently. Worked with no issues at all.


Top
 Profile  
 
PostPosted: 17 Feb 2014, 04:49 
Offline
User avatar

Joined: 08 Aug 2009, 03:11
Posts: 2133
Location: Chilliwack, BC
"44" I've had go bad and become useless.

Got 8Kg's of "88" core on fleabay (GREAT for chassis and oxidized sockets and terminal strips) made in 2002 and still using it.

I go through 2Kg's a year (4 if doing a lot of builds) and looking for an equivalent when it runs out. Unsuccessful so far :|

_________________
-= Gregg =-
* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design


Top
 Profile  
 
PostPosted: 22 May 2016, 07:26 
Offline
User avatar

Joined: 01 Jun 2013, 09:05
Posts: 574
I believe solder has a shelf life,

However its a lot longer than a couple of years. Sometimes the flux seems to loose its properties.
It also depends how its stored if its in a sealed bag or container or left out as a roll where normally the top layers corrode and oxidise.

I remember watching a contractor making off some comms cables and he was mumbling to himself so I wandered over he said these joints are rubbish. I asked what solder he was using and he produced a roll of what looked like lead wire with green oxidisation on it. I said are you really using that? (I thought he was joking) yes had it for years. I said you need to replace that if it goes dull.

As far as I'm concerned if its dull its scrap! YMMV (are you really going to put that oxide into the joint?) If its in a sealed bag or container it lasts longer (Years). I have used solder on new reels that have been in storage for 5 years or more and its still good. However it was in a polly sealed roll. If its dull I will wind off the layers until its bright before considering using it and throw the rest away.


Regards
M. Gregg

_________________
What is the sound of one hand clapping?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
DIY Tube Projects :: DIY Tube Amp Kits :: DIY Speaker Projects :: DIY Solid State Projects :: DIY IC / Op-amp Projects :: DIY Phono Projects :: DIY Cable Projects :: Hi-Fi Audio Schematics
© diyAudioProjects.com - Terms of Service - Privacy Policy