English Amiga Board


Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 17 November 2019, 05:14   #1
ItsTheSmell
Registered User

 
Join Date: Mar 2018
Location: New Ferry
Posts: 219
soldering flux

Im teaching myself how to do solder rework, someone on here recommended Topnik RF800 for flux. When I dab some of this stuff on it shoots off in all directions (probably due to its surface tension being low). Ive got non acidic plumbers paste which is neutral but it seemed really thick and when I put heat onto it I was scared it would burn the board, could I be right about that?
So watching YouTube videos a channel recommends MECHANIC MCN-UV80 which is self cleaning but I cant find it in the UK, all Ebay offers is MCN-UV50 which isn't self cleaning, is there any particular reason I cant buy it here in the UK? Is the MCN-UV50 as good/better? Or can someone point me to a good solder paste that will stay put when I apply it.


Daz
ItsTheSmell is offline  
Old 17 November 2019, 05:32   #2
Nightshft
Registered User

Nightshft's Avatar
 
Join Date: Mar 2018
Location: Austria
Age: 44
Posts: 234
Hi Daz,

I just did my fist recap (A600 and I'm happy it turned out well) and -although soldering since I'm 10- bought my first flux for this task.
At amazon.de: La-Co, regular soldering flux paste, A black 125g plastic can with a red cap. The brush that's mounted on the cap is so thick it could be used to work on cars but that doesnt matter, you can apply the paste however you like.
Applying the heat, ok, it splashed a little bit, but it worked quite well, it helped with the soldering process, guess I would buy it again.

Last edited by Nightshft; 18 November 2019 at 15:33.
Nightshft is offline  
Old 17 November 2019, 05:39   #3
ItsTheSmell
Registered User

 
Join Date: Mar 2018
Location: New Ferry
Posts: 219
Thats the stuff I have in my van, I suppose all I need to do is find its melting point and compare it to other solder/flux. simples.
ItsTheSmell is offline  
Old 17 November 2019, 10:40   #4
Hewitson
Registered User
Hewitson's Avatar
 
Join Date: Feb 2007
Location: Melbourne, Australia
Age: 37
Posts: 3,398
Do NOT use plumbing flux for electronics!
Hewitson is offline  
Old 17 November 2019, 21:07   #5
ItsTheSmell
Registered User

 
Join Date: Mar 2018
Location: New Ferry
Posts: 219
Can you be a bit more specific with that, why shouldn't we use plumbers flux if its neutral pH? Does it need more heat to melt or something? Looking on my tub it doesn't say anything about how to use it, its melting point or anything.
ItsTheSmell is offline  
Old 17 November 2019, 21:56   #6
Jope
-
Jope's Avatar
 
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 39
Posts: 7,435
It's super corrosive compared to electronics fluxes.. Better leave it for copper pipes.
Jope is offline  
Old 17 November 2019, 22:38   #7
jbilander
Registered User

jbilander's Avatar
 
Join Date: Jun 2018
Location: Stockholm
Posts: 113
I use ChipQuick SMD291 No-Clean Tack Flux or Amtech NC-559-V2-TF Tacky Flux with plunger needle. For solder paste Loctite GC 10 solder paste in syringe (can be stored up to one year at regular room temperatures). The Quick 861DW ESD hot air soldering station is a great rework station. Check Louis Rossmann's youtube review. He sells the Amtech Flux too. The Loctite paste you can get from eleshop.eu as well as the Quick station.
jbilander is offline  
Old 18 November 2019, 01:08   #8
ItsTheSmell
Registered User

 
Join Date: Mar 2018
Location: New Ferry
Posts: 219
But if the flux has a neutral pH how is it corrosive? I bought the quick 861de yesterday based onrossmanss webpage he did for beginners. I'll check out the flux' you recommended. So flux goes off?
ItsTheSmell is offline  
Old 18 November 2019, 02:11   #9
Nightshft
Registered User

Nightshft's Avatar
 
Join Date: Mar 2018
Location: Austria
Age: 44
Posts: 234
The amazon.de ratings for La-Co are quite positive (in regards of electronic soldering) hence I bought it. My (short-term) impression is good. But can't tell for sure if there's a catch in the long term or not.
Nightshft is offline  
Old 18 November 2019, 07:41   #10
ItsTheSmell
Registered User

 
Join Date: Mar 2018
Location: New Ferry
Posts: 219
Quote:
Originally Posted by jbilander View Post
I use ChipQuick SMD291 No-Clean Tack Flux or Amtech NC-559-V2-TF Tacky Flux with plunger needle. For solder paste Loctite GC 10 solder paste in syringe (can be stored up to one year at regular room temperatures). The Quick 861DW ESD hot air soldering station is a great rework station. Check Louis Rossmann's youtube review. He sells the Amtech Flux too. The Loctite paste you can get from eleshop.eu as well as the Quick station.

The Loctite GC10 is £89 for 500g


Does solder paste contain solder and flux mixed together in an all you need spread?
ItsTheSmell is offline  
Old 18 November 2019, 11:30   #11
Daedalus
Registered User

Daedalus's Avatar
 
Join Date: Jun 2009
Location: Dublin, then Glasgow
Posts: 4,346
Yeah, you really want to use flux intended for electronics use, typically "no-clean", but you should still clean it up. That's just to differentiate from other fluxes which absolutely must be thoroughly cleaned afterwards. Just because it's pH neutral doesn't mean it can't react with things. You also have to consider that flux is designed to operate at elevated temperatures, so its properties at room temperature will be different from when it's at 150 degrees. Flux is designed to become active as the joint heats up in preparation for solder.

Yes, solder paste is basically flux with millions of tiny solder beads suspended in it. Ordinarily you wouldn't need any more flux, but on occasion additional flux might be helpful. Unless you're setting up a production line, you don't need 500g of solder paste. Look for 25g syringes, which will be more expensive per gram, but will have enough to make hundreds, if not thousands, of SMT solder joints. Solder paste does indeed have a shelf life. some can be extended by refrigerating, but either way, if you buy 500g of paste, you'll likely find yourself dumping about 450g of it in a couple of years' time.

The Chipquix tack flux is what I use too, I find it great.
Daedalus is offline  
Old 18 November 2019, 11:34   #12
ItsTheSmell
Registered User

 
Join Date: Mar 2018
Location: New Ferry
Posts: 219
Superb, thanks Daedalus
That chipquix is expensive

Last edited by ItsTheSmell; 18 November 2019 at 11:55.
ItsTheSmell is offline  
Old 18 November 2019, 15:22   #13
cmorley
Registered User

 
Join Date: Jun 2018
Location: Oxford, UK
Posts: 44
Topnik 83 is cheap from eBay. Brush on and works well. I mostly use genuine Amtech flux and that is much more expensive but a little nicer to work with.
cmorley is offline  
Old 19 November 2019, 11:16   #14
Daedalus
Registered User

Daedalus's Avatar
 
Join Date: Jun 2009
Location: Dublin, then Glasgow
Posts: 4,346
To be honest, the difference in price between good quality products and less good quality products isn't that huge if you're buying small quantities, and as said, the better products, by and large, will make your life easier. You don't need much of it, so unless you're doing a lot of soldering, a small syringe will likely do you for a long time.
Daedalus is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Greaseweazle - the cheap flux tool! lesta_smsc support.Hardware 64 25 November 2019 23:47
soldering flux ItsTheSmell support.Hardware 7 01 October 2019 13:35
Dr. Plummet's House of Flux Graham Humphrey Games images which need to be WHDified 1 11 March 2013 05:04
Dr. Plummet`s House of flux stainy HOL data problems 2 07 July 2011 17:57
Dr. Plummet's House Of Flux :( osama request.Old Rare Games 3 29 December 2001 04:22

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


All times are GMT +2. The time now is 15:07.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Page generated in 0.07754 seconds with 15 queries