The latest on tin whiskers in lead-free soldering?

On 7/29/2013 5:05 PM, Jon Elson wrote:
Fred Abse wrote:

On Sat, 27 Jul 2013 18:25:22 -0500, Jon Elson wrote:

Mostly, I end up buying solder on
eBay at about half list price.

Traceability?

Thank goodness airplanes won't fall out of the sky and
nuclear reactors won't blow up if my stuff croaks. So, I
don't need traceability. Since I'm a one-man shop, I have
to do EVERYTHING here, from buying parts and designing boards,
to building, testing, shipping and customer support.
I really can't handle any more levels of paperwork.
Click to expand...
Tell me about it. I recently was able to turn my production testing
over to the fab house that makes my boards reducing my work to
paperwork. But my customer has moved production to Mexico so I am doing
international shipping now. That is *such* a hassle if you don't know
the ropes. Even knowing the ropes it is not so much fun. I spent a
bunch of time today dealing with not having written down my password for
the government AESdirect site. Their requirements for passwords are not
only far, far beyond what any web site I've ever used includes, it isn't
even documented properly on their web site. I probably spent two hours
total just trying to get onto their site over the last few days. Of
course that was my fault for trying to *remember* the insanely complex
password. I should have known better, they make you replace it every
two months anyway and if you don't use it for a month they deactivate
your account... :(

Then there is tax time...

--

Rick
 
On 7/28/2013 4:24 AM, Jan Panteltje wrote:
It was the PURPOSE of that rule: produce and sell more.
For the same reason they change TV standards and other standards
ever more often: sales.
Click to expand...
What? They've changed TV standards once in some 60 years... that is
"ever more often"???

--

Rick
 
On 7/28/2013 6:44 AM, Phil Allison wrote:
"Jeff Liebermann = lying radio ham cunthead"

Absence of evidence is not evidence of absence.


** Yes it FUCKING is - you brainless, bullshitting TWAT !!

1. Whenever the evidence SHOULD be there and is NOT.

2. When there is simply no proper supporting evidence at all.

FYI:

The NUMBER ONE proof that something is 100% BULLSHIT

- is that nothing *credible* makes it fact.

Idiot.
Click to expand...
Wow, such a breath of fresh air...

--

Rick
 
On Mon, 29 Jul 2013 20:19:07 -0400, the renowned rickman
<gnuarm@gmail.com> wrote:

On 7/28/2013 4:24 AM, Jan Panteltje wrote:
It was the PURPOSE of that rule: produce and sell more.
For the same reason they change TV standards and other standards
ever more often: sales.

What? They've changed TV standards once in some 60 years... that is
"ever more often"???
Click to expand...
The original set-top box:
http://tv-boxes.com/uhf/philcoUHF.jpg

... from that to 8K 3D TV, there have been a few changes.

http://www.youtube.com/watch?v=uLfy3uTjmu8



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On 7/30/2013 3:27 AM, Spehro Pefhany wrote:
On Mon, 29 Jul 2013 20:19:07 -0400, the renowned rickman
gnuarm@gmail.com> wrote:

On 7/28/2013 4:24 AM, Jan Panteltje wrote:
It was the PURPOSE of that rule: produce and sell more.
For the same reason they change TV standards and other standards
ever more often: sales.

What? They've changed TV standards once in some 60 years... that is
"ever more often"???

The original set-top box:
http://tv-boxes.com/uhf/philcoUHF.jpg

.. from that to 8K 3D TV, there have been a few changes.

http://www.youtube.com/watch?v=uLfy3uTjmu8
Click to expand...
Really? From the time they introduced color and UHF I don't recall any
standards changes until we had HDTV and digital transmissions. What did
I miss?

--

Rick
 
On Tue, 30 Jul 2013 03:45:51 -0400, the renowned rickman
<gnuarm@gmail.com> wrote:

On 7/30/2013 3:27 AM, Spehro Pefhany wrote:
On Mon, 29 Jul 2013 20:19:07 -0400, the renowned rickman
gnuarm@gmail.com> wrote:

On 7/28/2013 4:24 AM, Jan Panteltje wrote:
It was the PURPOSE of that rule: produce and sell more.
For the same reason they change TV standards and other standards
ever more often: sales.

What? They've changed TV standards once in some 60 years... that is
"ever more often"???

The original set-top box:
http://tv-boxes.com/uhf/philcoUHF.jpg

.. from that to 8K 3D TV, there have been a few changes.

http://www.youtube.com/watch?v=uLfy3uTjmu8

Really? From the time they introduced color and UHF I don't recall any
standards changes until we had HDTV and digital transmissions. What did
I miss?
Click to expand...
UHF and color are already two changes. cable boxes, digital cable
boxes, HD and digital HD cable boxes, VCD, DVD, Blu-Ray, 3D, 4K, 8K.
RCA->Component->HDMI, internet (with Hulu, Netflix, Slingbox,
Chromecast etc.) Lots of changes. Though they did succeed in
preventing analog HD from ever being adopted.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Tue, 30 Jul 2013 08:22:00 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Tue, 30 Jul 2013 03:45:51 -0400, the renowned rickman
gnuarm@gmail.com> wrote:

On 7/30/2013 3:27 AM, Spehro Pefhany wrote:
On Mon, 29 Jul 2013 20:19:07 -0400, the renowned rickman
gnuarm@gmail.com> wrote:

On 7/28/2013 4:24 AM, Jan Panteltje wrote:
It was the PURPOSE of that rule: produce and sell more.
For the same reason they change TV standards and other standards
ever more often: sales.

What? They've changed TV standards once in some 60 years... that is
"ever more often"???

The original set-top box:
http://tv-boxes.com/uhf/philcoUHF.jpg

.. from that to 8K 3D TV, there have been a few changes.

http://www.youtube.com/watch?v=uLfy3uTjmu8

Really? From the time they introduced color and UHF I don't recall any
standards changes until we had HDTV and digital transmissions. What did
I miss?

UHF and color are already two changes. cable boxes, digital cable
boxes, HD and digital HD cable boxes, VCD, DVD, Blu-Ray, 3D, 4K, 8K.
RCA->Component->HDMI, internet (with Hulu, Netflix, Slingbox,
Chromecast etc.) Lots of changes. Though they did succeed in
preventing analog HD from ever being adopted.


Best regards,
Spehro Pefhany
Click to expand...

You not read too well...

He said the window between UHF's introduction and HDTV's first
standard.

There was no hulu or any of that crap. It was just as MPEG-2 was being
formed that the HDTV standard got mapped out too.

ALL satellite transponders were still being fired with standard 4:3
SCPC and each 6MHz slot still only carried one channel.

All the cable boxes (companies) did was expand the channel fill to
include the rest of the already existing band allocation. At ONE channel
per 6mHz slot. After MPEG-2 and As HDTV was being formed, there came
MCPC
and a new compression schema which allowed those same 6MHz wide channel
slots to carry more than one channel. That was when we saw our channel
counts shoot up and satellites that were already in place multiply their
capacity overnight. But the NTSC video standard that constructs the
image... not much change there.
 
On Tue, 30 Jul 2013 05:54:50 -0700, DecadentLinuxUserNumeroUno
<DLU1@DecadentLinuxUser.org> wrote:

You not read too well...

He said the window between UHF's introduction and HDTV's first
standard.
Click to expand...
Which, you say, is 60 years?
 
On Sun, 28 Jul 2013 14:20:28 +0100, Peter wrote:


I don't think component leads were ever plated with tin-lead, were they?
Can you even do that? You would have to solder bath immerse them I
think, which isn't going to be done with an IC lead frame. That will
always be plated, and I don't think you can plate tin-lead as such.
Click to expand...
Hot dip plating has been around for a long time. For Zinc on Ferrous
metals it is called Hot Dip Galvanizing. Really common.

?-)
 
josephkk <joseph_barrett@sbcglobal.net> wrote

On Sun, 28 Jul 2013 14:20:28 +0100, Peter wrote:


I don't think component leads were ever plated with tin-lead, were they?
Can you even do that? You would have to solder bath immerse them I
think, which isn't going to be done with an IC lead frame. That will
always be plated, and I don't think you can plate tin-lead as such.

Hot dip plating has been around for a long time. For Zinc on Ferrous
metals it is called Hot Dip Galvanizing. Really common.
Click to expand...
I know, but I was talking about IC lead frames, not busbars or water
tanks. IC lead frames are normally stamped out and plated.

Also, Japan went lead-free about 15 years ago and if whatever goes
onto IC lead frames was making whiskers, we would know about it by
now.

I've never seen IC lead frames plated with bright shiny tin, or bright
shiny anything. They are always grey.

Europe (and the USA being forced to follow commercially) went lead
free c. 2005 onwards.

More importantly many companies in the *industrial* marketplace (i.e.
where products are not chucked out after a few years) used the Control
& Monitoring exemption and didn't go LF till much later, and *that* is
where a problem could be lurking.
 
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