So what's the truth about lead-free solder ?
 

Don Bowey wrote:

On 7/30/07 2:16 AM, in article ,
"Spurious Response" wrote:


Good thing I do not have to live up to your E-1 grade, petty wuss
assessments, you petty wuss.

You're so nasty I'd have had you given the brush treatment to clean you up.
Or else.....


Stiff wire brush and lye soap? AKA "GI Shower"?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

So what's the truth about lead-free solder ?
 

On Mon, 30 Jul 2007 06:32:39 -0700 Don Bowey wrote in
Message id: :

On 7/30/07 2:16 AM, in article ,
"Spurious Response" wrote:

[...]

Good thing I do not have to live up to your E-1 grade, petty wuss
assessments, you petty wuss.

You're so nasty I'd have had you given the brush treatment to clean you up.
Or else.....

I'd smack him, but **** splatters.

So what's the truth about lead-free solder ?
 

On 7/30/07 8:14 AM, in article , "Michael A.
Terrell" wrote:

Don Bowey wrote:

On 7/30/07 2:16 AM, in article ,
"Spurious Response" wrote:


Good thing I do not have to live up to your E-1 grade, petty wuss
assessments, you petty wuss.

You're so nasty I'd have had you given the brush treatment to clean you up.
Or else.....


Stiff wire brush and lye soap? AKA "GI Shower"?


Stiff bristle. Yes. I wanted to see if the brainless one knew more than
his grade.

So what's the truth about lead-free solder ?
 

On 7/30/07 8:35 AM, in article ,
"none" wrote:

On Mon, 30 Jul 2007 06:32:39 -0700 Don Bowey wrote in
Message id: :

On 7/30/07 2:16 AM, in article ,
"Spurious Response" wrote:

[...]

Good thing I do not have to live up to your E-1 grade, petty wuss
assessments, you petty wuss.

You're so nasty I'd have had you given the brush treatment to clean you up.
Or else.....

I'd smack him, but **** splatters.

:) good one.

So what's the truth about lead-free solder ?
 

On Mon, 30 Jul 2007 08:55:00 -0700, in alt.usenet.kooks, Don Bowey
bloviated:

On 7/30/07 8:35 AM, in article ,
"none" wrote:

On Mon, 30 Jul 2007 06:32:39 -0700 Don Bowey wrote in
Message id: :

On 7/30/07 2:16 AM, in article ,
"Spurious Response" wrote:

[...]

Good thing I do not have to live up to your E-1 grade, petty wuss
assessments, you petty wuss.

You're so nasty I'd have had you given the brush treatment to clean you up.
Or else.....

I'd smack him, but **** splatters.

:) good one.

Wanna see something better:
Hey, Numbya, how many people have ASVAB scores on their DD214?

He claims that he has a DD214 with all his ASVAB scores that prove he
is smarter than 85% (or 90% depending upon which day he is lying) of
the people in the military.

--

Does the name Pavlov ring a bell?

Aratzio - Usenet ruiner #2

So what's the truth about lead-free solder ?
 

On Mon, 30 Jul 2007 17:02:27 -0700 Spurious Response
wrote in Message id:
:

On Mon, 30 Jul 2007 11:35:23 -0400, none wrote:

On Mon, 30 Jul 2007 06:32:39 -0700 Don Bowey wrote in
Message id: :

On 7/30/07 2:16 AM, in article ,
"Spurious Response" wrote:

[...]

Good thing I do not have to live up to your E-1 grade, petty wuss
assessments, you petty wuss.

You're so nasty I'd have had you given the brush treatment to clean you up.
Or else.....

I'd smack him, but **** splatters.


You're so full of ****, your eyes are brown, and there is a foul stench
emanating from your ears. Your mother should have been jailed as a felon
for the crime of not flushing your retarded **** filled mass, the moment
she defecated you from her ass and called it a birthing.

All that for a lame, long-winded IKYABWAI. Sad, really...

Say, why don't you clean yourself up, brush your teeth and go to bed, or
I'll tell your mom you're using the computer after curfew and you still
wet the bed.

So what's the truth about lead-free solder ?
 

none wrote:

All that for a lame, long-winded IKYABWAI. Sad, really...

Say, why don't you clean yourself up, brush your teeth and go to bed, or
I'll tell your mom you're using the computer after curfew and you still
wet the bed.


Come on! The 'Silly Rabbit' is nothing more than a nervous little
Chihuahua on Cappuccino yapping his fool head off. His mother had the
good sense to sell him to the circus for a quarter the day after he was
hatched.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

So what's the truth about lead-free solder ?
 

PeteS wrote in message
...
Eeyore wrote:

Allodoxaphobia wrote:

Eeyore wrote:

The debate about lead free solders seem to be nearly as politically
charged as
that about anthropogenic global warming and a casualty seems to be
useful data.
More than political -- the subject could easily be viewed as troll
bait.
It's been 'discussed' many times in ser.

It's not a troll.

New data ought be available as to the effects on actual in-service
reliability of
lead-free by now. It seems as I expected, anecdotally, that musical
equipment
products that tend to see high levels of vibration are suffering.

Graham


This subject came back to bite me yet again today. There's a great part
I wanted to use, but we'll have to refinish the pins first if I do, so
I'll see if there's a different part I can use in this application. For
the record, it's a high speed (not full speed) USB peripheral controller
and the lead finish is 98/2 SnCu.
I consulted with a few of the manufacturing people and one of the
biggest problems with RoHS profiles is the solders aren't eutectic, so
getting a proper bond is more difficult quite apart from the problem
with tin whiskers.

Cheers

PeteS

I think I'll make up a tool for mechanically scraping this "tin-plating" off
the next power tranny.
My first idea is two back to back Skarsten scrapper blades to scrape back 2
sides at one time.

So what's the truth about lead-free solder ?
 

N Cook wrote:

PeteS wrote in message
...
Eeyore wrote:

Allodoxaphobia wrote:

Eeyore wrote:

The debate about lead free solders seem to be nearly as politically
charged as
that about anthropogenic global warming and a casualty seems to be
useful data.
More than political -- the subject could easily be viewed as troll
bait.
It's been 'discussed' many times in ser.

It's not a troll.

New data ought be available as to the effects on actual in-service
reliability of
lead-free by now. It seems as I expected, anecdotally, that musical
equipment
products that tend to see high levels of vibration are suffering.

Graham


This subject came back to bite me yet again today. There's a great part
I wanted to use, but we'll have to refinish the pins first if I do, so
I'll see if there's a different part I can use in this application. For
the record, it's a high speed (not full speed) USB peripheral controller
and the lead finish is 98/2 SnCu.
I consulted with a few of the manufacturing people and one of the
biggest problems with RoHS profiles is the solders aren't eutectic, so
getting a proper bond is more difficult quite apart from the problem
with tin whiskers.

Cheers

PeteS

I think I'll make up a tool for mechanically scraping this "tin-plating"
off the next power tranny.
My first idea is two back to back Skarsten scrapper blades to scrape back
2 sides at one time.

You might find that a tool is already available which works for this
purpose. I'm thinking of the things for scraping the enamel off
transformer winding wi
http://www.buerklin.com/gruppen/KapL/L115880.asp

Chris

So what's the truth about lead-free solder ?
 

PeteS wrote:

Eeyore wrote:
Allodoxaphobia wrote:
Eeyore wrote:

The debate about lead free solders seem to be nearly as politically charged as
that about anthropogenic global warming and a casualty seems to be useful data.
More than political -- the subject could easily be viewed as troll bait.
It's been 'discussed' many times in ser.

It's not a troll.

New data ought be available as to the effects on actual in-service reliability of
lead-free by now. It seems as I expected, anecdotally, that musical equipment
products that tend to see high levels of vibration are suffering.


This subject came back to bite me yet again today. There's a great part
I wanted to use, but we'll have to refinish the pins first if I do, so
I'll see if there's a different part I can use in this application. For
the record, it's a high speed (not full speed) USB peripheral controller
and the lead finish is 98/2 SnCu.
I consulted with a few of the manufacturing people and one of the
biggest problems with RoHS profiles is the solders aren't eutectic, so
getting a proper bond is more difficult quite apart from the problem
with tin whiskers.

What's the application that requires this refinishing ?

Graham

So what's the truth about lead-free solder ?
 

Chris Jones wrote in message
...
N Cook wrote:

PeteS wrote in message
...
Eeyore wrote:

Allodoxaphobia wrote:

Eeyore wrote:

The debate about lead free solders seem to be nearly as politically
charged as
that about anthropogenic global warming and a casualty seems to be
useful data.
More than political -- the subject could easily be viewed as troll
bait.
It's been 'discussed' many times in ser.

It's not a troll.

New data ought be available as to the effects on actual in-service
reliability of
lead-free by now. It seems as I expected, anecdotally, that musical
equipment
products that tend to see high levels of vibration are suffering.

Graham


This subject came back to bite me yet again today. There's a great part
I wanted to use, but we'll have to refinish the pins first if I do, so
I'll see if there's a different part I can use in this application. For
the record, it's a high speed (not full speed) USB peripheral
controller
and the lead finish is 98/2 SnCu.
I consulted with a few of the manufacturing people and one of the
biggest problems with RoHS profiles is the solders aren't eutectic, so
getting a proper bond is more difficult quite apart from the problem
with tin whiskers.

Cheers

PeteS

I think I'll make up a tool for mechanically scraping this "tin-plating"
off the next power tranny.
My first idea is two back to back Skarsten scrapper blades to scrape
back
2 sides at one time.

You might find that a tool is already available which works for this
purpose. I'm thinking of the things for scraping the enamel off
transformer winding wi
http://www.buerklin.com/gruppen/KapL/L115880.asp

Chris

So what's the truth about lead-free solder ?
 

You might find that a tool is already available which works for this
purpose. I'm thinking of the things for scraping the enamel off
transformer winding wi
http://www.buerklin.com/gruppen/KapL/L115880.asp

Chris






But those are RoHS compliant.

More to the point, for removing laquer , not hard tin , from round surface.
I just tried a Skarstan blade , singly, in its normal wooden handle and it
scrapped the hard tin off some of the flat leads of the latest batch of
TIP35C/36C power trannies that I bought. Down to the copper with no
difficulty, I think I can ignore the tin-pest developinmg on the narrow
edges as long as the main surface contact areas are functionally solderable.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

So what's the truth about lead-free solder ?
 

Eeyore wrote:

Allodoxaphobia wrote:

Eeyore wrote:

The debate about lead free solders seem to be nearly as politically charged as
that about anthropogenic global warming and a casualty seems to be useful data.
More than political -- the subject could easily be viewed as troll bait.
It's been 'discussed' many times in ser.

It's not a troll.

New data ought be available as to the effects on actual in-service reliability of
lead-free by now. It seems as I expected, anecdotally, that musical equipment
products that tend to see high levels of vibration are suffering.

Graham


This subject came back to bite me yet again today. There's a great part
I wanted to use, but we'll have to refinish the pins first if I do, so
I'll see if there's a different part I can use in this application. For
the record, it's a high speed (not full speed) USB peripheral controller
and the lead finish is 98/2 SnCu.
I consulted with a few of the manufacturing people and one of the
biggest problems with RoHS profiles is the solders aren't eutectic, so
getting a proper bond is more difficult quite apart from the problem
with tin whiskers.

Cheers

PeteS

So what's the truth about lead-free solder ?
 

N Cook wrote:



You might find that a tool is already available which works for this
purpose. I'm thinking of the things for scraping the enamel off
transformer winding wi
http://www.buerklin.com/gruppen/KapL/L115880.asp

Chris

But those are RoHS compliant.

More to the point, for removing laquer , not hard tin , from round
surface.
Ok, it was just a thought. I was imagining the round pin of a T03 when I
thought of that.

I just tried a Skarstan blade , singly, in its normal wooden
handle and it scrapped the hard tin off some of the flat leads of the
latest batch of TIP35C/36C power trannies that I bought. Down to the
copper with no difficulty, I think I can ignore the tin-pest developinmg
on the narrow edges as long as the main surface contact areas are
functionally solderable.

Do you mean tin pest or whiskers? I would have thought that the edges would
be the worst place for whiskers to sprout from.

As for solderability, I would have thought that if the pins are exposed to a
sufficient quantity of sufficiently hot SnPb solder for a sufficient time,
then the tin would dissolve into the solder, like fine copper wire has an
annoying tendency to do. If overheating of the semiconductor device is a
risk, then perhaps it could be done in a couple of goes, allowing to cool
in between. The resulting tin-rich solder could either be removed and
replaced with fresh solder, or just diluted with more fresh solder.

I'm sure there would be plenty of people interested if you find a good
technique for small-scale use.

Chris

So what's the truth about lead-free solder ?
 

Chris Jones wrote in message
...
N Cook wrote:

Do you mean tin pest or whiskers? I would have thought that the edges
would
be the worst place for whiskers to sprout from.

As for solderability, I would have thought that if the pins are exposed to
a
sufficient quantity of sufficiently hot SnPb solder for a sufficient time,
then the tin would dissolve into the solder, like fine copper wire has an
annoying tendency to do. If overheating of the semiconductor device is a
risk, then perhaps it could be done in a couple of goes, allowing to cool
in between. The resulting tin-rich solder could either be removed and
replaced with fresh solder, or just diluted with more fresh solder.

I'm sure there would be plenty of people interested if you find a good
technique for small-scale use.

Chris


With the sort of stuff I deal with, geometry-wise, tin whiskers have no
relevance I would have thought.
It is that film of tin , all lovely mirror shiney when new turning to grotty
dusty grey (tin pest) , expanding in the process , and physically pushing
the solder away from any conduction maybe only 2 years down the road.
I am not sure just heating legs with solder would affect the integrity of
that initial tin film without some sort of mechanical intrusion while hot
and mixing.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/