[Heathkit] Cleaning up after Soldering and kit building.

[Drew P.]

kiyoinc wrote: 

> I recall a review of an SB-303 that had been "professionally" built.
> The reviewer remarked that the rosin flux had been "washed off" the
> circuit boards. This was one of the hall marks of a professional
> assembly job.
>
> How do you do that?  Does water wash rosin off or do you use something
> else?   I visited a commercial assembly company and they had a huge
> machine that used de-ionized water to clean their circuit boards.

[snip]

100% isopropyl alcohol works well.  Rubbing alcohol contains isopropyl but also contains water and will not work.  Easiest to find source of 100% isopropyl alky in small quantities is isopropyl formulation gas line anti-freeze from the auto parts store or many other suppliers.  Be certain that the bottle's label states that it is an isopropyl formulation; otherwise, most of the gas line anti-freeze is methanol which does not work very well.

Drew