[sdiy] top soldering through hole

Vladimir Pantelic vladoman at gmail.com
Wed Feb 14 17:44:14 CET 2018


My Fluitin 1532 lists "pleasant pine smell" in the data sheet and is
"no-clean". using that since the 90's with no issue so far...


On 14.02.2018 17:37, Quincas Moreira wrote:
> Yeah, like I mentioned, I don't see much residue at all, but if I had to
> guess it's probably rosin based (smells like rosin I use for my double
> bass and cello bows!)
> I'll research, thanks again!
> 
> On Wed, Feb 14, 2018 at 10:07 AM, Pete Hartman <pete.hartman at gmail.com
> <mailto:pete.hartman at gmail.com>> wrote:
> 
>     It doesn't say what the flux is, at least with the minimal help of
>     Google Translate.  What to clean with depends on what the flux is.
> 
>     Water soluble/corrosive stuff looks like someone sneezed on the
>     board -- lots of pasty translucent junk everywhere, so if you're not
>     seeing much residue it very likely is not that.
> 
>     Rosin core is the other common flux I've seen that ought to be
>     cleaned, and that looks like you'd expect, a tree bled bits of amber
>     all over your board.  Again, your description doesn't sound like
>     that either.
> 
>     I'd follow up with the solder manufacturer to get a recommendation
>     from them as to what the flux is and how best to clean it or if it
>     even needs cleaning.
> 
>     Pete
> 
> 
> 
> 
>     On Wed, Feb 14, 2018 at 9:59 AM, Quincas Moreira <quincas at gmail.com
>     <mailto:quincas at gmail.com>> 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
>         <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
> 
> 
> 
> 
> 
> -- 
> Quincas Moreira
> Test Pilot at VBrazil Modular
> 
> 
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