[sdiy] top soldering through hole

Pete Hartman pete.hartman at gmail.com
Wed Feb 14 20:08:40 CET 2018


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-co
>>> n-aleacion-estano-plomo-60-40.html
>>>             <http://www.steren.com.mx/rollo-de-100-gramos-de-soldadura-c
>>> on-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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