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

J

Jan Panteltje

Jan 1, 1970
0
Have you considered a brain transplant ?

No, but come to think of it, yes, yours.
A stationary picture is no way to evaluate the quality of a compressed signal.
It eliminites the most offensive aspect of compression, motion artifacts.

Graham

Look mr rabbit, if I had made available a video clip, you would have complained
you needed a real testcard, and I would be sued for copyright infrigment.
 
J

Jan Panteltje

Jan 1, 1970
0
And I had two of their top flight Barracuda series ( SCSI server types ) die in
under a month each.

Graham

Yea, the way it is, some people ... you should not lend your car to either.
Or even your hanky.
 
E

Eeyore

Jan 1, 1970
0
Jan said:
Actually there is something wrong in that testcard due to 16:10 aspect
translation, here is the one from a normal 4:3 screen:
ftp://panteltje.com/pub/testcard.png

This one is 1:1 pixel for pixel as it is received, the previous one
was rescaled to 767x576, this one is as it comes in here in 720x576 PAL.
Now that is a lot better!

There's still plenty of bleed betwen the colours.

Graham
 
E

Eeyore

Jan 1, 1970
0
Jan said:
Look mr rabbit, if I had made available a video clip, you would have complained
you needed a real testcard, and I would be sued for copyright infrigment.

So you accept it was pointless to post such a link. Good.

Graham
 
E

Eeyore

Jan 1, 1970
0
Jan said:
Eeyore

Yea, the way it is, some people ... you should not lend your car to either.
Or even your hanky.

Hankies are a disgusting way of speading germs.

Graham
 
E

Eeyore

Jan 1, 1970
0
PeteS said:
I'm currently consluting in the aerospace / military equipment area and
this place goes to the length of re-balling BGAs with eutectic tin-lead
solder, clearing and refinishing pins etc. - i.e. if it's not the right
finish, the company refinishes the part.

There are some non SnPb finishes that are ok in non-safety critical
systems, but safety critical (flight control computers, FADECs etc) must
have a tin-lead solder profile. Gets to be a real problem with small
passives.

Pushes up the price of everything, of course.

The effort invoved in puting lead back on components always strikes me as one of
the more bizarre aspects of RoHS. Talk about proof the idea was fundamentally
wrong in the first place !

Graham
 
J

Jan Panteltje

Jan 1, 1970
0
So you accept it was pointless to post such a link. Good.

Graham

Mixomatose was actually also a solution to the rabbit plague of overpopulation.
 
J

Jan Panteltje

Jan 1, 1970
0
There's still plenty of bleed betwen the colours.

Graham

Poor rabbit guy, do you not know UV in YUV is reduced resolution?
In PAL it is even half that vertically.
There

But yes, most rabits are grey, and have no color problem.
Mixomatose was their problem IIRC.

So what problem do you have with this one then:
ftp://panteltje.com/pub/00000300.ppm
?
You know this is part of a moving scene that you can see yourself on Sky HD
Promo, just one frame of it.

Oh you cannot see Sky HD, well you can see this.
Artefacts, WHAT artefacts?
 
E

Eeyore

Jan 1, 1970
0
Jan said:
Eeyore wrote


Mixomatose was actually also a solution to the rabbit plague of overpopulation.

FYI, Eeyore is a donkey, not a rabbit.

Graham
 
E

Eeyore

Jan 1, 1970
0
Jan said:
Poor rabbit guy, do you not know UV in YUV is reduced resolution?
In PAL it is even half that vertically.
There

I though that your precious digital tramsmission method was supposed to
eliminate the limitations of PAL, not replicate them.

Graham
 
J

Jan Panteltje

Jan 1, 1970
0
I though that your precious digital tramsmission method was supposed to
eliminate the limitations of PAL, not replicate them.

Graham

It does not replicate these, it uses a compression scheme that takes advantage
of the fact that the eye has less receptors for color then for BW.
As did PAL.
ftp://panteltje.com/pub/testcard.png
You did not even look Fri Jul 27 20:20:02 CEST 2007
Your no donkey, you are CHICKEN!!!!!
 
J

Jan Panteltje

Jan 1, 1970
0
It does not replicate these, it uses a compression scheme that takes advantage
of the fact that the eye has less receptors for color then for BW.
As did PAL.
ftp://panteltje.com/pub/testcard.png
You did not even look Fri Jul 27 20:20:02 CEST 2007
Your no donkey, you are CHICKEN!!!!!

EH I MENT:
ftp://panteltje.com/pub/00000300.ppm
 
P

PeteS

Jan 1, 1970
0
Jan said:
Jan Panteltje wrote:

Joe Chisolm wrote

Dr Howard Johnson (High Speed Digital Design) had this article in
his email newsletter (and posted on his site). Interesting read.
Rollback RoHS: http://www.sigcon.com/Pubs/news/10_01.htm
Well seems [all] we have to [do is] make some traces .65mm apart :)
Some ? ALL !
AFAIK this exemption only applies to component lead finishes.

Best regards,
Spehro Pefhany

Too bad....
How about conductive glue replacing solder?
Na, will have to wait until the first EU politician's cellphone fails in
some emergency.

Or their kid's game console stops working; wait - that's already
happening ;)

Cheers

PeteS
 
P

PeteS

Jan 1, 1970
0
Traver said:
The main issue for lead free in military and aerospace electronics is
tin whiskers. Tin solder will
grow conductive whiskers that even penetrate conformal coatings. In
low power circuit,
the whisker will short something out. In a high power circuit, it
might burn up like a fuse,
but if it happens in a satellite (no atmospheric pressure) the little
whisker will cause
a plasma arc capable of passing huge amounts of current.

We in the defense electonics industry fight with this issue every day
and the information
is very confusing. Parts turn lead free midstream in production and
seems impossible to
keep tack of it. Every company is dealing with it differently. We stay
away from certain
finishes like bright tin and look at the spacing of components and
coatings on our boards.
This can mitigate some of the reliability risks of lead free.

If high-rel is of upmost importance, we struggle to find tin-lead
parts.

I'm currently consluting in the aerospace / military equipment area and
this place goes to the length of re-balling BGAs with eutectic tin-lead
solder, clearing and refinishing pins etc. - i.e. if it's not the right
finish, the company refinishes the part.

There are some non SnPb finishes that are ok in non-safety critical
systems, but safety critical (flight control computers, FADECs etc) must
have a tin-lead solder profile. Gets to be a real problem with small
passives.

Pushes up the price of everything, of course.

Cheers

PeteS
 
A

Arfa Daily

Jan 1, 1970
0
Eeyore said:
Hankies are a disgusting way of speading germs.

Graham
No they're not. It's better than sneezing all over a lift full of people, or
standing there sniffing a dripping stream of snot repeatedly back up your
nose, or wiping it on the back of your hand like anyone under the age of 40
does now ...

Arfa
 
J

Jan Panteltje

Jan 1, 1970
0
No you didn't.

You have not looked, you are chicken to be proved wrong,
your monitor could not even display it likely.
You lost the argument.
Uttering IA or insults changes nothing.
You know zero about the subject of dgital and little
about analog TV.

BYE

<certified rabbit free>
 
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