Cleaning boards
Jon Slaughter
Basically I probably can't do much scrubbing because of the small
components(don't want to accidently force any off). It may not be an issue
but I'd like to avoid any such problems if possible.
mook johnson
"Jon Slaughter" <Jon_Sl...@Hotmail.com> wrote in message
news:hhrlja$asc$1...@news.eternal-september.org...
MG chemicals Flux cleaner and a acid/epoxy brush with the bristles cut down
to about 1/2" long.
Alcohol will work as well but not quite as good.
If using a water clean flux Alcohol will do a poor job. use a Water based
flux cleaner.
You can wrap the acid brush with tape and squirt the flux cleaner down the
hollow handle and it will wick
out the bristles as you scrub.
no worries about knocking components off. you don't need to scrub that
hard. Let hte bristles do the work.
John Larkin
I like acetone and a small brush.
John
Spehro Pefhany
For prototypes made with rosin-flux solder, I use lacquer thinner and
a toothbrush- the free ones from the dentist generally work fine for
me. Outdoors, or in an area with good ventillation. The lacquer
thinner can take some markings off, so avoid contact with e-caps etc.
There is commercial flux remover too, but I find the lacquer thinner
works well.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
sp...@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
Archimedes' Lever
Well, in every case, it is 100% dependent on what solder process was
used, and what type of flux.
Water soluble? Use HOT water, preferably de-ionized, filtered water.
Only if you have no transformers on it that have not been vacuum
impregnated. OR you could bake it for several hours afterward, or
subject it to a vacuum for a while to draw out and evaporate any water
that remains.
RMA flux, use HOT IPA 99%, then a vacuum chamber session and a bake
session as PCB media is hygroscopic, particularly after being stripped
clean with alcohol.
No clean?. I would read the spec sheet on it for what the flux is
soluble in that does not also attack other component elements.
Acetone on a PCB? You're nuts! It will melt nearly any polymer used on
it, including some silk screen inks, and will definitely strip clean any
EL cap markings, etc.
Unless you are one of those "women cleaning their nails" types that
would sit there with a q-tip swab and clean each solder joint
individually.
After that waste of labor and money, you could buy a purpose specific
cleaning 'machine' and save time and money. It would pay for itself in
short order.
Nik Rim
"Jon Slaughter" <Jon_Sl...@Hotmail.com> wrote in message
news:hhrlja$asc$1...@news.eternal-september.org...
Cheap way I use with rosin flux solder is: methylated spirits (a soak for a
minute helps) then brush with tooth brush. Brush & rinse with distilled /
deionised water. Dry off in the sun or in the oven set to the coolest
setting.
Archimedes' Lever
<spef...@interlogDOTyou.knowwhat> wrote:
>For prototypes made with rosin-flux solder, I use lacquer thinner and
>a toothbrush-
Rosin fluxes use an alcohol vehicle. Why would you use paint thinner on
that? Not only that, but it attacks other elements of the assembly
besides just the flux.
Spehro Pefhany
It works better, IME, and dries faster. As with an uncontrolled
soldering iron, one must work skillfully to avoid compromising
quality.
Archimedes' Lever
Any PCB assembly can handle like 80C. for long term baking operations.
That is like 176F.
Nik Rim
"Archimedes' Lever" <OneBi...@InfiniteSeries.Org> wrote in message
news:bea3k5t2n13q3ub86...@4ax.com...
Yeah that'd be about what our (kitchen) oven does on lowest setting, just
hot enough that you can't hold it for too long!
Archimedes' Lever
<spef...@interlogDOTyou.knowwhat> wrote:
>On Mon, 04 Jan 2010 00:23:49 -0800, the renowned Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Mon, 04 Jan 2010 02:13:24 -0500, Spehro Pefhany
>><spef...@interlogDOTyou.knowwhat> wrote:
>>
>>>For prototypes made with rosin-flux solder, I use lacquer thinner and
>>>a toothbrush-
>>
>> Rosin fluxes use an alcohol vehicle. Why would you use paint thinner on
>>that? Not only that, but it attacks other elements of the assembly
>>besides just the flux.
>
>It works better, IME, and dries faster. As with an uncontrolled
>soldering iron, one must work skillfully to avoid compromising
>quality.
>
>
An alcohol wash NEVER compromises anything when used to clean a pcb.
One can even use it on old, crystallized flux, if you first heat up
both the assembly, and the alcohol. When you apply the heat to the
assembly, you may see it re-liquify, making it even easier to remove.
What "compromise in quality" do you refer to? Unless you are talking
about YOUR process.
MK
"Jon Slaughter" <Jon_Sl...@Hotmail.com> wrote in message
news:hhrlja$asc$1...@news.eternal-september.org...
ultrasonic cleaner then 3 rinses in de-ionised water then dry with fan
heater. Much safer (for you) than orgranic solvents and seems to do a very
good job.
Michael Kellett
Archimedes' Lever
Exactly. And that you have to let cool for a bit before continuing.
Boris Mohar
<Jon_Sl...@Hotmail.com> wrote:
Along with various fluids already mentioned, I use electric toothbrush for
scrubbing.
--
Boris
Didi
<jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
> On Sun, 3 Jan 2010 20:59:49 -0600, "Jon Slaughter"
>
> >What's a good way to remove flux from hand solidered SMT boards? Alcohol?
> >Basically I probably can't do much scrubbing because of the small
> >components(don't want to accidently force any off). It may not be an issue
> >but I'd like to avoid any such problems if possible.
>
> I like acetone and a small brush.
>
> John
Likely the best technique, mine is similar.
I often get away with a solvent for pain which is mostly acetone
and some other aggressive stuff, but it has heavy fractions which
are known to be killing in some cases (e.g. Ge detector preamps where
almost everything is :-) ).
I recently had a related moronic experience - knowing that this
solvent can be bad and thinking it finally got me.
I had just put together the prototype of a new product
( http://tgi-sci.com/tgi/nmcatb.htm ) and was happily testing
various things which all went OK until I discovered it was crashing
when doing intensive disk i/o (recursive directory copying from
one place to another) simultaneously with the related display
overhead (listing & scrolling a line per file copied).
It tended to go away when I messed with the ATA connector - a non
standard one, 41 pin 1mm pitch - but then I could not do anything
about it, every time I thought I had washed away the problem off the
connector contacts or resoldered that bad joint or whatever it
recurred. Chasing that had become part of my daily routine for
a week or may be two weeks.
Until I discovered the reason was a non-initialized bit in system
memory upon power on... had been random all the time.
Dimiter
------------------------------------------------------
Dimiter Popoff Transgalactic Instruments
http://www.tgi-sci.com
------------------------------------------------------
http://www.flickr.com/photos/didi_tgi/sets/72157600228621276/
John Larkin
<OneBi...@InfiniteSeries.Org> wrote:
>On Sun, 03 Jan 2010 22:35:40 -0800, John Larkin
><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>
>>On Sun, 3 Jan 2010 20:59:49 -0600, "Jon Slaughter"
>><Jon_Sl...@Hotmail.com> wrote:
>>
>>>What's a good way to remove flux from hand solidered SMT boards? Alcohol?
>>>Basically I probably can't do much scrubbing because of the small
>>>components(don't want to accidently force any off). It may not be an issue
>>>but I'd like to avoid any such problems if possible.
>>
>>I like acetone and a small brush.
>>
>>John
>
>
> Well, in every case, it is 100% dependent on what solder process was
>used, and what type of flux.
>
> Water soluble? Use HOT water, preferably de-ionized, filtered water.
>
> Only if you have no transformers on it that have not been vacuum
>impregnated. OR you could bake it for several hours afterward, or
>subject it to a vacuum for a while to draw out and evaporate any water
>that remains.
>
> RMA flux, use HOT IPA 99%, then a vacuum chamber session and a bake
>session as PCB media is hygroscopic, particularly after being stripped
>clean with alcohol.
IPA tends to leave white residue. For a hand-soldered board, as OP
states he's doing, and RMA flux, targeted brushing with a strong
solvent like acetone works great. Acid brushes work well. Of course
don't use acetone on parts that don't like it.
Water soluble and no-clean fluxes are awful, especially if surface
leakage matters.
Production cleaning is a different animal.
John
Joel Koltner
news:31j4k5po0rbj8ruh6...@4ax.com...
> IPA tends to leave white residue. For a hand-soldered board, as OP
> states he's doing, and RMA flux, targeted brushing with a strong
> solvent like acetone works great. Acid brushes work well. Of course
> don't use acetone on parts that don't like it.
Every tried Goo Gone? It gets rid of flux just fine and doesn't melt
plastics. It seems to evaporate away, although I've always wondered whether
or not it's still leaving some thin film behind.
> Water soluble and no-clean fluxes are awful, especially if surface
> leakage matters.
Awful is tens of megs between points, say, 1/8" apart? Or hundreds?
Thanks,
---Joel
whit3rd
> What's a good way to remove flux from hand solidered SMT boards? Alcohol?
If you use water-soluble flux, mist the board with a low-residue
wetting agent (Kodak Photo-Flo in few-drops-to-a-pint dilution).
Then, do a distilled or deionized water rinse: use a squeeze-bottle
to play a jet of clean solvent, finishing with a top-to-bottom final
rinse.
A bit of compressed air will help chase the last droplets off, but
stand the board on edge, on an absorbent towel, to dry.
On some kinds of low-power circuitry, especially in solder-bump,
the dry period afterward can take days.
If you're in a hurry, follow the water rinse with isopropyl alcohol.
Spehro Pefhany
<zapwireD...@yahoo.com> wrote:
>"John Larkin" <jjla...@highNOTlandTHIStechnologyPART.com> wrote in message
>news:31j4k5po0rbj8ruh6...@4ax.com...
>> IPA tends to leave white residue. For a hand-soldered board, as OP
>> states he's doing, and RMA flux, targeted brushing with a strong
>> solvent like acetone works great. Acid brushes work well. Of course
>> don't use acetone on parts that don't like it.
>
>Every tried Goo Gone? It gets rid of flux just fine and doesn't melt
>plastics. It seems to evaporate away, although I've always wondered whether
>or not it's still leaving some thin film behind.
I think they've done something to that stuff. I keep it around to take
off adhesive overspray (I think it leaves a *lot* of oil behind, BTW)
but the last bottle I bought smells like soap rather than citrus and
doesn't work worth a d*mn.
Jon Slaughter
And what kinda parts are these? Will almost all IC's, passives, LED's, etc
be fine with acetone?
Archimedes' Lever
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Sun, 03 Jan 2010 23:12:39 -0800, Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Sun, 03 Jan 2010 22:35:40 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>On Sun, 3 Jan 2010 20:59:49 -0600, "Jon Slaughter"
>>><Jon_Sl...@Hotmail.com> wrote:
>>>
>>>>What's a good way to remove flux from hand solidered SMT boards? Alcohol?
>>>>Basically I probably can't do much scrubbing because of the small
>>>>components(don't want to accidently force any off). It may not be an issue
>>>>but I'd like to avoid any such problems if possible.
>>>
>>>I like acetone and a small brush.
>>>
>>>John
>>
>>
>> Well, in every case, it is 100% dependent on what solder process was
>>used, and what type of flux.
>>
>> Water soluble? Use HOT water, preferably de-ionized, filtered water.
>>
>> Only if you have no transformers on it that have not been vacuum
>>impregnated. OR you could bake it for several hours afterward, or
>>subject it to a vacuum for a while to draw out and evaporate any water
>>that remains.
>>
>> RMA flux, use HOT IPA 99%, then a vacuum chamber session and a bake
>>session as PCB media is hygroscopic, particularly after being stripped
>>clean with alcohol.
>
>IPA tends to leave white residue.
Then, it isn't clean yet.
A completely clean board that last 'saw' IPA will not exhibit the
problem you describe.
Likely relates to your lack of grasp of the vapor phase thing too. are
there any liquids that you know how to use properly?
> For a hand-soldered board, as OP
>states he's doing, and RMA flux, targeted brushing with a strong
>solvent like acetone works great.
NO brushing is needed at all if one cleans immediately and before any
crystallization occurs. In fact, this time critical function is the only
way to do it right. The dopes that solder up the entire assembly, then
attempt to perform the cleaning are in too goddamned big a hurry.
> Acid brushes work well.
Except I do not consider the light touch they give to be "brushing"
even though the tool has that moniker.
> Of course
>don't use acetone on parts that don't like it.
It is a bad choice fro ANY PCB assembly, regardless of component type.
Dissolved VOCs WILL end up UNDER your components. It is nearly
impossible to escape.
>Water soluble and no-clean fluxes are awful, especially if surface
>leakage matters.
That is what vacuum chambers and baking ovens are for. D'oh!
>Production cleaning is a different animal.
Yes, and we all know that your grasp of that process is flawed as well.
Archimedes' Lever
<zapwireD...@yahoo.com> wrote:
>"John Larkin" <jjla...@highNOTlandTHIStechnologyPART.com> wrote in message
>news:31j4k5po0rbj8ruh6...@4ax.com...
>> IPA tends to leave white residue. For a hand-soldered board, as OP
>> states he's doing, and RMA flux, targeted brushing with a strong
>> solvent like acetone works great. Acid brushes work well. Of course
>> don't use acetone on parts that don't like it.
>
>Every tried Goo Gone? It gets rid of flux just fine and doesn't melt
>plastics. It seems to evaporate away, although I've always wondered whether
>or not it's still leaving some thin film behind.
Aslo not a good choice. It has a bunch of natural emulsifiers in it.
One is a lemon oil based job.
It is kind of like silicone oils... You do not want them anywhere near
your electronic circuit assemblies, or if you do use it, you still need
to do an alcohol 'rinse' to get back to a truly clean board.
I have had a LOT of experience with this as a 50kV power supply HAS to
have the multip[lier section in as clean an environ as can be achieved.
Even so much as 'coffee breath' on an HV multiplier cap or the board, and
the encapsulation fails, and the supply fails.
I KNOW how to clean electronic assemblies.
Acetone, lacquer thinner and other volatile compounds and solvent are
NOT EVER recommended. Alcohol is about the strongest "solvent" one would
ever want to use, because it "solves" flux, but does NOT solve plastics,
inks, silk screens, etc., etc., etc.
>
>> Water soluble and no-clean fluxes are awful, especially if surface
>> leakage matters.
>
>Awful is tens of megs between points, say, 1/8" apart? Or hundreds?
Water works fine, even on the 50kV supply if one knows what the ENTIRE
process is, which INCLUDES a vacuum chamber session and or a bake oven
session.
It really is *that* simple.
Archimedes' Lever
wrote:
>If you're in a hurry, follow the water rinse with isopropyl alcohol.
Even THAT will NOT 'pull' all of the water out of ANY PCB assembly. PCB
media is VERY hygroscopic. So, even regardless of the alcohol finish
rinse, one STILL needs to bake the damned thing out or subject it to a
vacuum for a period of about five minutes. AND no, it does not matter
that it has a solder mask on it. THAT, in fact, can trap water in the
fiberglass layers of the PCB media.
Our HV supplies had NO mask in the multiplier section, where the
potting needed to obtain decent 'adhesion'.
Some of this basic stuff is laid out in IPC-610.
Joel Koltner
> Aslo not a good choice. It has a bunch of natural emulsifiers in it.
> One is a lemon oil based job.
Apparently Goo Gone is largely napta and citrus oil:
http://householdproducts.nlm.nih.gov/cgi-bin/household/brands?tbl=brands&id=13009002 .
Interesting.
Thanks for the response...
Jim Thompson
Sure does work well for removing price stickers.
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Archimedes' Lever
<Jon_Sl...@Hotmail.com> wrote:
If you have to ask about a solvent and use of it on a PCB assembly, it
is the wrong material.
Archimedes' Lever
<To-Email-Use-Th...@My-Web-Site.com/Snicker> wrote:
>On Mon, 4 Jan 2010 17:33:18 -0800, "Joel Koltner"
><zapwireD...@yahoo.com> wrote:
>
>>"Archimedes' Lever" <OneBi...@InfiniteSeries.Org> wrote in message
>>news:pa45k5l0378mhcjap...@4ax.com...
>>> Aslo not a good choice. It has a bunch of natural emulsifiers in it.
>>> One is a lemon oil based job.
>>
>>Apparently Goo Gone is largely napta and citrus oil:
>>http://householdproducts.nlm.nih.gov/cgi-bin/household/brands?tbl=brands&id=13009002 .
>>Interesting.
>>
>>Thanks for the response...
>
>Sure does work well for removing price stickers.
>
> ...Jim Thompson
Then, he puts the lower price sticker on, and then demands that he get
the product for the marked price at the register.
I knew that you were a characterless criminal!
John Larkin
More like gohms, but very humidity sensitive. If you trap ionic crud
under a part, you can get down into the megohms, and can start
electroplating lead and copper and what-all everywhere.
We got one batch of boards from an assembler who washed them badly,
probably a combination of dirty wash water and inadequate spraying.
They leaked like mad. We bought a WaterPic toothbrush thing and worked
them over part-by-part with deionized water, then baked. That fixed
them.
If you conformal coat cruddy boards, you're in big trouble. We specify
RMA flux and solvent cleaning on sensitive analog stuff.
John
John Larkin
<OneBi...@InfiniteSeries.Org> wrote:
The thing that we all know is that you're AlwaysWrong.
John
Archimedes' Lever
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>More like gohms, but very humidity sensitive. If you trap ionic crud
>under a part, you can get down into the megohms, and can start
>electroplating lead and copper and what-all everywhere.
Solvents like Acetone suspend them, and then they ALSO leave some
behind afterward.
Bad choice... always.
Archimedes' Lever
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>
>The thing that we all know...
The problem, John, is what "we all" is defined as.
John Larkin
Everyone in the group except you and your 48 nyms.
John
krw
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>
>>>The thing that we all know...
>>
>>
>> The problem, John, is what "we all" is defined as.
>
>Everyone in the group except you and your 48 nyms.
Nymbecile has more than 70 (he lies a lot, though).
John Larkin
That means he can play with himself!
John
Archimedes' Lever
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>
>>>The thing that we all know...
>>
>>
>> The problem, John, is what "we all" is defined as.
>
>Everyone in the group except you and your 48 nyms.
>
Sure, Johnny... you continue thinking that you speak for everyone.
John Larkin
<OneBi...@InfiniteSeries.Org> wrote:
>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>
>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
>><OneBi...@InfiniteSeries.Org> wrote:
>>
>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>
>>>>
>>>>The thing that we all know...
>>>
>>>
>>> The problem, John, is what "we all" is defined as.
>>
>>Everyone in the group except you and your 48 nyms.
>>
>
> Sure, Johnny... you continue thinking that you speak for everyone.
Well, let's be scientific and take a survey:
How many people think A.L. is a competent electronic designer and a
good Christian?
How many people think he's a profane jerk and AlwaysWrong?
John
Jim Thompson
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Tue, 05 Jan 2010 02:38:42 -0800, Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
>>><OneBi...@InfiniteSeries.Org> wrote:
>>>
>>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>>
>>>>>
>>>>>The thing that we all know...
>>>>
>>>>
>>>> The problem, John, is what "we all" is defined as.
>>>
>>>Everyone in the group except you and your 48 nyms.
>>>
>>
>> Sure, Johnny... you continue thinking that you speak for everyone.
>
>
>Well, let's be scientific and take a survey:
>
>How many people think A.L. is a competent electronic designer
Not a chance.
> and a
>good Christian?
Perhaps. Lots of 'Christians' are mean vengeful people with no guts
to carry out their hate.
>
>How many people think he's a profane jerk and AlwaysWrong?
>
>
>John
>
Absolutely! Absolutely! Absolutely! Absolutely!
Archimedes' Lever
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Tue, 05 Jan 2010 02:38:42 -0800, Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
>>><OneBi...@InfiniteSeries.Org> wrote:
>>>
>>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>>
>>>>>
>>>>>The thing that we all know...
>>>>
>>>>
>>>> The problem, John, is what "we all" is defined as.
>>>
>>>Everyone in the group except you and your 48 nyms.
>>>
>>
>> Sure, Johnny... you continue thinking that you speak for everyone.
>
>
>Well, let's be scientific and take a survey:
>
>How many people think A.L. is a competent electronic designer and a
>good Christian?
>
>How many people think he's a profane jerk and AlwaysWrong?
>
>
>John
>
Damn! I have to order a new clutch for my reel now!
krw
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Mon, 04 Jan 2010 22:39:58 -0600, krw <k...@att.bizzzzzzzzzzz> wrote:
>
>>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
>>><OneBi...@InfiniteSeries.Org> wrote:
>>>
>>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>>
>>>>>
>>>>>The thing that we all know...
>>>>
>>>>
>>>> The problem, John, is what "we all" is defined as.
>>>
>>>Everyone in the group except you and your 48 nyms.
>>
>>Nymbecile has more than 70 (he lies a lot, though).
>
>That means he can play with himself!
Right, he's still a virgin.
krw
<jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>On Tue, 05 Jan 2010 02:38:42 -0800, Archimedes' Lever
><OneBi...@InfiniteSeries.Org> wrote:
>
>>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>
>>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
>>><OneBi...@InfiniteSeries.Org> wrote:
>>>
>>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>>
>>>>>
>>>>>The thing that we all know...
>>>>
>>>>
>>>> The problem, John, is what "we all" is defined as.
>>>
>>>Everyone in the group except you and your 48 nyms.
>>>
>>
>> Sure, Johnny... you continue thinking that you speak for everyone.
>
>
>Well, let's be scientific and take a survey:
>
>How many people think A.L. is a competent electronic designer and a
>good Christian?
A.L.? Don't you mean A.W.? He's never designed anything in his life.
He doesn't even have designs on women.
>How many people think he's a profane jerk and AlwaysWrong?
Three strikes!
Nemo
electronics assembly is done according to ancient lore laid down by folk
long gone, and I am deeply dubious about some aspects of it. They
sometimes put PCB's in an ultrasonic bath filled with some kind of thin
citrus-smelling liquid for 10 minutes of shrill abuse.
It doesn't seem to clean flux off much though. And I wonder whether the
ultrasonics could damage stuff (I asked if it could be used on a device
with exposed wire bonds, and the manufacturers said definitely not.) I
would be interested in information on that. Meanwhile, I'll give RMA
flux and acetone a go.
--
Nemo
krw
<OneBi...@InfiniteSeries.Org> wrote:
>On Tue, 05 Jan 2010 11:32:24 -0800, John Larkin
><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>
>>On Tue, 05 Jan 2010 02:38:42 -0800, Archimedes' Lever
>><OneBi...@InfiniteSeries.Org> wrote:
>>
>>>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>
>>>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
>>>><OneBi...@InfiniteSeries.Org> wrote:
>>>>
>>>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
>>>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>>>>>
>>>>>>
>>>>>>The thing that we all know...
>>>>>
>>>>>
>>>>> The problem, John, is what "we all" is defined as.
>>>>
>>>>Everyone in the group except you and your 48 nyms.
>>>>
>>>
>>> Sure, Johnny... you continue thinking that you speak for everyone.
>>
>>
>>Well, let's be scientific and take a survey:
>>
>>How many people think A.L. is a competent electronic designer and a
>>good Christian?
>>
>>How many people think he's a profane jerk and AlwaysWrong?
>>
>>
>>John
>>
>
>
> Damn! I have to order a new clutch for my reel now!
Yes, we knew all of your gears were stripped, DimBulb.
John Larkin
I've seen crystal oscillators that had a warning on their datasheet to
not ultrasonic clean.
John
Michael A. Terrell
mook johnson wrote:
>
> "Jon Slaughter" <Jon_Sl...@Hotmail.com> wrote in message
> news:hhrlja$asc$1...@news.eternal-september.org...
> > What's a good way to remove flux from hand solidered SMT boards? Alcohol?
> > Basically I probably can't do much scrubbing because of the small
> > components(don't want to accidently force any off). It may not be an issue
> > but I'd like to avoid any such problems if possible.
>
> to about 1/2" long.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=41338
36 for $4.99
They are on sale for $1.99 on page 11 of their current flyer:
No coupon required.
Along with trimming them to 1/2", I like to solder the seam at the
bristles, where the handle is crimped. That keeps the bristles from
falling out for a longer time, and doesn't let the crimp fill with flux.
--
Greed is the root of all eBay.
Michael A. Terrell
He's a real circle jerk, of one. :(
WangoTango
jjla...@highNOTlandTHIStechnologyPART.com says...
Most definitely.
I have seen some damaged before too, so I guess the warnings are
justified.
JosephKK
Never was and never will be either one.
>
>How many people think he's a profane jerk and AlwaysWrong?
>
Totally both.
>
>John
>
Nemo
>On Wed, 6 Jan 2010 22:52:59 +0000, Nemo
OK, thanks. I'll cast an eye over the types of boards they clean that
way for non solid state components.
--
Nemo
Michael A. Terrell
Jim Thompson wrote:
>
> On Tue, 05 Jan 2010 11:32:24 -0800, John Larkin
> <jjla...@highNOTlandTHIStechnologyPART.com> wrote:
>
> >On Tue, 05 Jan 2010 02:38:42 -0800, Archimedes' Lever
> ><OneBi...@InfiniteSeries.Org> wrote:
> >
> >>On Mon, 04 Jan 2010 20:25:32 -0800, John Larkin
> >><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
> >>
> >>>On Mon, 04 Jan 2010 19:03:29 -0800, Archimedes' Lever
> >>><OneBi...@InfiniteSeries.Org> wrote:
> >>>
> >>>>On Mon, 04 Jan 2010 18:04:48 -0800, John Larkin
> >>>><jjla...@highNOTlandTHIStechnologyPART.com> wrote:
> >>>>
> >>>>>
> >>>>>The thing that we all know...
> >>>>
> >>>>
> >>>> The problem, John, is what "we all" is defined as.
> >>>
> >>>Everyone in the group except you and your 48 nyms.
> >>>
> >>
> >> Sure, Johnny... you continue thinking that you speak for everyone.
> >
> >
> >Well, let's be scientific and take a survey:
> >
> >How many people think A.L. is a competent electronic designer
>
> Not a chance.
>
> > and a
> >good Christian?
>
> Perhaps. Lots of 'Christians' are mean vengeful people with no guts
> to carry out their hate.
No, those are 'C.I.N.O.'
> >How many people think he's a profane jerk and AlwaysWrong?
> >
> >
> >John
> >
>
> Absolutely! Absolutely! Absolutely! Absolutely!
>
> ...Jim Thompson
> --
> | James E.Thompson, CTO | mens |
> | Analog Innovations, Inc. | et |
> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
> | Phoenix, Arizona 85048 Skype: Contacts Only | |
> | Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
> | E-mail Icon at http://www.analog-innovations.com | 1962 |
>
> I love to cook with wine. Sometimes I even put it in the food.
vtech9815
clean your pcb board but the cost may be a lot you can find some dealer
that probably will save you some money.
Paul