[sdiy] top soldering through hole

David Moylan dave at westphila.net
Wed Feb 14 19:15:48 CET 2018


I'm also using 331 water soluble for most components, then a board wash. 
  Blame Paul Schreiber.

On 02/14/2018 09:13 AM, Ian Fritz wrote:
> I use Kester 44, never clean the flux, and boards I built 40 years ago 
> are still fine.  Absorbs water? Corrodes? Somebody please come over and 
> show me, because I can't see any of that.
> 
> Always solder from the top, too.
> 
> Ian
> 
> 
> 
> On 2/14/2018 8:59 AM, Quincas Moreira wrote:
>> I use a local brand, Steren, 60/40
>> http://www.steren.com.mx/rollo-de-100-gramos-de-soldadura-con-aleacion-estano-plomo-60-40.html 
>>
>>
>> Yeah I guess it's not no clean, just regular leaded. I just never felt 
>> like enough flux got on the boards to warrant cleaning. I probably 
>> should though, if it's corrosive in the long run. I've only been doing 
>> this for 7 years, maybe I'll find out in 20 that I should have been 
>> cleaning all along!
>>
>> What should I use to clean then?
>>
>> Thanks Pete
>>
>>
>>
>>
>> On Wed, Feb 14, 2018 at 8:59 AM, Pete Hartman <pete.hartman at gmail.com 
>> <mailto:pete.hartman at gmail.com>> wrote:
>>
>>     What type of solder are you using?  Brand and model?
>>
>>     I use Kester 331 water soluble flux solder for early components
>>     (stuff that can get wet), and it comes off the board entirely with a	
>>     brush (nylon bristles, like a really big toothbrush) and warm/hot
>>     water.  Thing about it is, if I were using it on the top and it were
>>     getting under components it would take more like an ultrasonic bath
>>     to clean and get flux out from under resistors and things, and if
>>     you don't clean it, the stuff is corrosive in the longer run.
>>
>>     I finish up for things that can't get wet (pots etc) with Kester 245
>>     no-clean.  It does leave some residue, but the main point is that
>>     it's not meant to be cleaned off normally, and it doesn't leave
>>     enough to look like some of the messes I've seen.  I also use it for
>>     any top solder touch ups.
>>
>>     I've seen some really nasty work come across my workbench for
>>     repair, stuff with 331 flux still on it after who knows how long,
>>     stuff with ancient rosin flux with the black and brown lava flows
>>     all over it.
>>
>>     I figure if you're not using no-clean, you'd know it :)
>>
>>     Pete
>>
>>
>>
>>     On Wed, Feb 14, 2018 at 8:15 AM, Quincas Moreira <quincas at gmail.com
>>     <mailto:quincas at gmail.com>> wrote:
>>
>>         I’ve never cleaned a board, ever... Maybe I’m using no clean
>>         solder and didn’t even know it, I just never felt the need. My
>>         builds look clean enough to me. Am I trippin’?
>>
>>         Sent from my iPhone
>>
>>         On Feb 14, 2018, at 07:33, Pete Hartman <pete.hartman at gmail.com
>>         <mailto:pete.hartman at gmail.com>> wrote:
>>
>>>
>>>
>>>         On Wed, Feb 14, 2018 at 7:25 AM, Mattias Rickardsson
>>>         <mr at analogue.org <mailto:mr at analogue.org>> wrote:
>>>
>>>             Top side is much simpler, I'll never go back - but
>>>             probably a bit trickier to get clean from flux etc?
>>>
>>>
>>>          I think this is the main reason I still primarily bottom
>>>         solder, but I check my joints and if I have ones that didn't
>>>         wick up to the top I'll touch them up with no-clean.
>>>
>>>         Pete
>>>         _______________________________________________
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>>
>>
>>
>>
>>
>> -- 
>> Quincas Moreira
>> Test Pilot at VBrazil Modular
>>
>>
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> 
> 



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