[sdiy] Flux residue removal

[KA4HJH]

> On May 18, 2018, at 4:17 PM, Scott Gravenhorst <music.maker at gte.net> wrote:
> 
> 
> I was able to get 99% isopropanol online.  Google is your friend, I see it at Walmart
> and several other places.

I checked the local Walmart but it's one of the smaller stores and they didn't have it. I do have some denatured ethanol—which works better? (if there's any difference at all). 

Also, how concerned should I be about the residue on top of the board that I can't reach with a tooth brush? I'm working on that little digital scope we were talking about recently and it has an input impedance of 1MΩ. 

I'm also building a Nixie tube thermometer with a 170V power supply. The kit seller highly recommends removing the flux due to the presence of HV and CMOS logic on the same board.


>  I suspect that a reason it is either not stocked or bought
> up in stores is that it can be use to process cannabis into a more concentrated form. 

"Whoah Beavis, we need to try that out."

"Yeah, me to."


> I was also informed that IPA is not a proper abbreviation for it and that IPA really
> stands for India Pale Ale...  :)


Is that good for cleaning PC boards?  8D


Terry Bowman, KA4HJH
"The Mac Doctor"

-------------- next part --------------
   On May 18, 2018, at 4:17 PM, Scott Gravenhorst <[1]music.maker at gte.net>
   wrote:

   I was able to get 99% isopropanol online.  Google is your friend, I see
   it at Walmart
   and several other places.

   I checked the local Walmart but it's one of the smaller stores and they
   didn't have it. I do have some denatured ethanol--which works better?
   (if there's any difference at all).
   Also, how concerned should I be about the residue on top of the board
   that I can't reach with a tooth brush? I'm working on that little
   digital scope we were talking about recently and it has an input
   impedance of 1MW*.
   I'm also building a Nixie tube thermometer with a 170V power supply.
   The kit seller highly recommends removing the flux due to the presence
   of HV and CMOS logic on the same board.

    I suspect that a reason it is either not stocked or bought
   up in stores is that it can be use to process cannabis into a more
   concentrated form.

   "Whoah Beavis, we need to try that out."

   "Yeah, me to."

   I was also informed that IPA is not a proper abbreviation for it and
   that IPA really
   stands for India Pale Ale...  :)

   Is that good for cleaning PC boards?  8D

   Terry Bowman, KA4HJH
   "The Mac Doctor"

References

   1. mailto:music.maker at gte.net