[sdiy] top soldering through hole

Jason Proctor jason at redfish.net
Wed Feb 14 20:01:35 CET 2018


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/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>
>>             <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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