[sdiy] top soldering through hole

Quincas Moreira quincas at gmail.com
Wed Feb 14 17:37:55 CET 2018


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>
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>
> 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>
>> 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>
>>> 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> wrote:
>>>>
>>>>
>>>>
>>>> On Wed, Feb 14, 2018 at 7:25 AM, Mattias Rickardsson <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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