[sdiy] top soldering through hole

Jason Proctor jason at redfish.net
Wed Feb 14 20:13:21 CET 2018


right - for nocturnal post-wash drying i've used a heat gun on the lowest
setting - and usually from a distance!






On Wed, Feb 14, 2018 at 11:08 AM, Pete Hartman <pete.hartman at gmail.com>
wrote:

> Good point Jason.  I usually swing the board about and dry with a fluffy
> towel myself (rarely am I soldering during daylight).  If I was doing it
> 100% right I'd have an air compressor handy to blow dry it.
>
> On Wed, Feb 14, 2018 at 1:01 PM, Jason Proctor <jason at redfish.net> wrote:
>
>> wash with soapy water, rinse with cleanest water available, dry in sun
>>
>> the way to a shiny new flux-free board
>>
>>
>> On Wed, Feb 14, 2018 at 10:48 AM, MTG <grant at musictechnologiesgroup.com>
>> wrote:
>>
>>> Wash with what and dry how?  I've never water washed a board before.
>>>
>>> GB
>>>
>>> On 2/14/2018 10:29 AM, Jason Proctor 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
>>>> <mailto: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
>>>>             <http://www.steren.com.mx/roll
>>>> o-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>
>>>>             <mailto: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>
>>>>                  <mailto: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>
>>>>                      <mailto: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>
>>>>                 <mailto: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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