MOTM

Speaking of solder.....  Paul what solder do you buy for "organic?"  Since
I know you are Mr. Mouser, I bet you have a Mouser page number or part
number for it.

Thanks,
LH


> From: "Paul Schreiber" <synth1@...>
> 
> There are two reasons MOTM does not use rosin core solder (in fact, no
one
> has used rosin-core solder
> *in mass production* since about 1990).
> 
> #1 - rosin is designed to *attract moisture* (think of the rosin bag in
> baseball, and in gymnastics). Attracting
> moisture in *NOT* what we want in synths! Especially VCOs.
> 
> #2 - in order to *remove* the rosin off the boards, you need *horribly
> messy* chemicals. Freon was the older
> choice. There are spray cans of non-CFC rosin flux remover, but my
> experience is that this makes a huge
> mess because all you do is dissolve the flux and coat the whole pcb with
it!
> In production lines in the '70s/'80s
> there were massive, high-power water jets that 'scrubbed' the flux off
with
> 150 psi water nozzels after a good old Freon
> bath (the boards were actually immersed in liquid Freon).
> 
> Today, *all* soldering is using "No Clean" flux.
> 
> So, a fair question is :"Why not use No Clean everywhere?"
> 
> The answer is that I felt that No Clean is harder to solder, and that
> organic *still* has the best overall
> joint construction. The only reason No Clean replaced organic is that the
> manufacturers saved millions
> of dollars on water bills (and floor space!).
> 
> Paul S.