[sdiy] top soldering through hole

Ian Fritz ijfritz at comcast.net
Wed Feb 14 18:13:29 CET 2018


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
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> 
> 
> 
> 
> 
> -- 
> Quincas Moreira
> Test Pilot at VBrazil Modular
> 
> 
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ijfritz.byethost4.com


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