[sdiy] top soldering through hole

Michael E Caloroso mec.forumreader at gmail.com
Wed Feb 14 19:48:05 CET 2018


Pre-flux, pre-heat component lead and copper trace, apply 60/40
solder, capillary action and gravity does the rest.  Using a Weller
iron regulated to 700F, which is hot enough to leave minimal flux
behind.

MC

On 2/14/18, Jason Proctor <jason at redfish.net> wrote:
> same here -- 331 -> wash -> 44 for the rest. the boards are very clean and
> i've never had a single problem.
>
>
>
> On Wed, Feb 14, 2018 at 10:15 AM, David Moylan <dave at westphila.net> wrote:
>
>> 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
>>>>>         _______________________________________________
>>>>>         Synth-diy mailing list
>>>>>         Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
>>>>>         http://synth-diy.org/mailman/listinfo/synth-diy
>>>>>         <http://synth-diy.org/mailman/listinfo/synth-diy>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Quincas Moreira
>>>> Test Pilot at VBrazil Modular
>>>>
>>>>
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>>>>
>>>
>>>
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