Which solder?

C

creek

Guest
I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?
 
On Tue, 17 Mar 2009 09:21:51 -0700 (PDT), creek <jluers@gmail.com>
wrote:

I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?
Kester 63/37 with "44" resin core. Cleans nicely with isopropyl alcohol.
If you need to go RoHS, try Kester's SAC 305 with "48" resin.

--
Rich Webb Norfolk, VA
 
"creek" <jluers@gmail.com> wrote in message
news:78ef9178-8d15-4352-8723-36b34b3ff4e0@w34g2000yqm.googlegroups.com...
I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?

This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store variety...
 
Lord Garth wrote:

"creek" <jluers@gmail.com> wrote in message

I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?

This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store variety...
My pharmacist will get me pure ( medical grade ) isopropyl alcohol no
problem. 500ml min but I bought 2l last time.

Graham
 
"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:49BFDC0A.5BC9D8CF@hotmail.com...
Lord Garth wrote:

"creek" <jluers@gmail.com> wrote in message

I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?

This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store variety...

My pharmacist will get me pure ( medical grade ) isopropyl alcohol no
problem. 500ml min but I bought 2l last time.

Graham

What was his price?
 
On Mar 17, 1:18 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
wrote:
creek wrote:
I tried Kester "245" No-clean solder

In what process ?

Graham
Through hole and SMT hand soldering, if that is what you mean.
The solder is 21 Gauge (.031"), cored 1.1% flux, used with an
adjustable Weller WES51 iron set to around "6".

Is this the process for using 99% Iso: Soak, brush/scrub, rinse with
iso, rinse with distilled.
 
On Tue, 17 Mar 2009 12:35:22 -0700, creek wrote:
On Mar 17, 1:18 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
creek wrote:
I tried Kester "245" No-clean solder

In what process ?

Through hole and SMT hand soldering, if that is what you mean.
The solder is 21 Gauge (.031"), cored 1.1% flux, used with an
adjustable Weller WES51 iron set to around "6".

Is this the process for using 99% Iso: Soak, brush/scrub, rinse with
iso, rinse with distilled.
I've used just plain IPA - squirt it, brush as needed, rinse with IPA,
blow dry with clean, dry, oil-free air, done. :)

Cheers!
Rich
 
Lord Garth wrote:

"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote
Lord Garth wrote
"creek" <jluers@gmail.com> wrote

I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?

This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store variety...

My pharmacist will get me pure ( medical grade ) isopropyl alcohol no
problem. 500ml min but I bought 2l last time.

What was his price?
Her actually.

About Ł5 for 500 ml and Ł15 for 2l.

Graham
 
creek wrote:

Eeyore <rabbitsfriendsandrelati...@hotmail.com> wrote:
creek wrote:
I tried Kester "245" No-clean solder

In what process ?

Through hole and SMT hand soldering, if that is what you mean.
Yes.


The solder is 21 Gauge (.031"), cored 1.1% flux, used with an
adjustable Weller WES51 iron set to around "6".
If that's comparable to the venerable TCP, I use "8" almost always.


Is this the process for using 99% Iso: Soak, brush/scrub, rinse with
iso, rinse with distilled.
Soak in ? Soaking entire boards is not always advisable depending on
certain components.You should be able to just brush with iso and rinse.

Graham
 
"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:49C182AF.8746690A@hotmail.com...
Lord Garth wrote:

"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote
Lord Garth wrote
"creek" <jluers@gmail.com> wrote

I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present
in
our environment. I'll often poly-coat this to block the moisture
and
it seems to work OK but I don't think this is suggested. Other
times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a
small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?

This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store
variety...

My pharmacist will get me pure ( medical grade ) isopropyl alcohol no
problem. 500ml min but I bought 2l last time.

What was his price?

Her actually.

About Ł5 for 500 ml and Ł15 for 2l.

Graham
As with most items, there is a discount for quantity...
99% IPA was what $89 for about 15l (4 US gallons)
 
On Wed, 18 Mar 2009 23:24:31 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote:

Lord Garth wrote:

"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote
Lord Garth wrote
"creek" <jluers@gmail.com> wrote

I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?

This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store variety...

My pharmacist will get me pure ( medical grade ) isopropyl alcohol no
problem. 500ml min but I bought 2l last time.

What was his price?

Her actually.

About Ł5 for 500 ml and Ł15 for 2l.
---
Try buying it from an industrial chemical supplier (if you're allowed
to) and you might do better.

I recently bought 4 liters of anhydrous isopropanol:

http://www.jtbaker.nl/bin/prod_gevonden.ASP?zoekprodnr=8067&language=EXP

for about $30.

JF
 
On Tue, 17 Mar 2009 11:39:41 -0500, "Lord Garth"
<lgarth@tantalus.net> wrote:

"creek" <jluers@gmail.com> wrote in message
news:78ef9178-8d15-4352-8723-36b34b3ff4e0@w34g2000yqm.googlegroups.com...
I tried Kester "245" No-clean solder but sometimes end up with the
conductive white residue problem from the moisture that is present in
our environment. I'll often poly-coat this to block the moisture and
it seems to work OK but I don't think this is suggested. Other times
we pot this in epoxy but I worry about moisure migration down the
wires, I dont want failures 2 years from now.

I tried Kester "331" Water-soluble solder but trying to solder a small
44pin microprocessor with it is tough. It doesn't seem to wet and
flow as well, the soldering tip dries out too fast. Plus the fumes
will gag you.

I have not tried regular Rosin core only because I don't know how to
reliably clean it.


What do you use?


This will clean the flux residue.

http://www.pemro.com/items.asp?Cc=alc&CatMoveby=0&Nbm=&Pbm=&FromNav=

Note that this is neat isopropyl alcohol, not the drug store variety...

I have had good results from the 70% drugstore
variety, using an old toothbrush to gently scrub.
However, the same drugstore (Rite-Aid least in SE
Michigan) also sells a higher concentration, 97%
or something like that, which I have never tried.
It's not much more than the standard 70% stuff.

Best regards,


Bob Masta

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