I
ian field
- Jan 1, 1970
- 0
Roy L. Fuchs said:You have four days.
Someone else already told me I can still buy lead/tin solder because I
repair old stuff that was originally manufactured with lead/tin.
Roy L. Fuchs said:You have four days.
Michael A. Terrell said:Richard said:My high school chemistry teacher Mr. Samuel Perlmutter. He spent
20-30 years working as
a research chemist for the US Food and Drug Administration, before
spending much
of the rest of his life teaching honors chemistry to us brats. He
spent quite a
bit of time teaching us about the toxic risks of mercury, lead,
cadmium, and other
heavy metals. This was in the early 1970's. He won a number of
prestigious national
awards for his teaching. If you google, ["Samuel Perlmutter" award]
you can find
a shamefully tiny bit of information about him. Not much considering
the tremendous
boost he gave his many students.
Lack of any actual reference to ingestion-caused poisioning
noted.
What proof do you have that runs against hundreds of years of common
knowledge, beginning with the downfall of the Roman Empire?
Surely you don't think THAT argument holds any water?
There is absolutely no indication that we have learned
ANYTHING. We are headed in exactly the same direction
and exceeding the historical speed limit, at that.
The Romans used a lead compound to sweeten their wine. Lead water
supply pipes have a layer of calcium that keeps the water away from the
lead. On the other hand, you wouldn't want to use lead to distribute
soft or distilled water.
--
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
nospam said:Of the few you gave which I could look at the one with this extract will do
a) The most substantial evidence from cross-sectional and
prospective studies of populations with PbB levels generally
below 1.2 µmol/litre (25 µg/dl) relates to decrements in
intelligence quotient (IQ). It is important to note that such
observational studies cannot provide definitive evidence of a
causal relationship with lead exposure. However .... blah blah
and what a rant the last linked reference you gave is.
Rene Tschaggelar said:A stuck system ?
As youth I spent a fair number of afternoons to grab
old car batteries from the junkyard and wheeled them on the
bicycle to the car battery maker which would give me 5
bucks for each. Mom just wondered why the t-shirts become
porous rather quickly.
Rene
nospam said:I looked at everything I could find on the internet and I looked a few
years ago at the time leaded petrol was prohibited in the UK. I looked to
find out for myself what if any justification there was rather than just
blindly accepting glib statements like ...
ian said:The Romans also served food on pewter dishes - practically solder by another
name!
Chuck Harris said:Ok, now I know your probable motive.
Well, yes and no.
The tin in the RoHS parts dilutes the tin-lead solder, and makes
it a funny alloy that usually looks frosty when it cools. I would
suggest using 60-40, as opposed to 63-37 solder. The resulting alloy
sure looks better. As the tin heats up on the part, it wrinkles
and looks really nasty where it is exposed to oxygen.
All that aside, once you get a decent looking joint with tin-lead
solder, on RoHS parts, things are great.
When you start working with lead free solder, you will notice that
"good" joints look like cold solder joints with normal solder.
Also, in storage, RoHS parts oxidize and that prevents them from
taking solder, so be wary of older stock parts.
The electronics industry is going to be hurt really bad by this
stupid diversion into giving the euronation that warm and fuzzy
feeling of being lead-free. Their time and efforts would be better
spent ridding themselves of lead plumbing. Lead, the "plumb" in
plumbing.
-Chuck Harris
nospam said:No you don't. I already posted (I thought in this thread) that the real
reason for removing lead from petrol was to facilitate catalytic converters
and that on balance I thought it was probably a good thing.
I have no motive other than a desire to see the world managed properly by
competent people rather than the bunch of mostly fuckwits who are a law
unto themselves we have now.
You will care rather fast when you learn that X-ray put you to slowKlaus said:I second that. Considering that car batteries are easy to recycle and
are actually of some value - lead is a rather expensive metal. Hence,
it's not very likely for them to end, where they shouldn't end..
I think you have a point here. I'm personally speculating as to which
extent a changed attitude towards electronics products has made RoHS
possibel. I believe that people are really tired of all the cheapish,
plastics electronics garbage, formally known as consumer electronics,
which don't last very long, cannot be repaired (service, spare parts are
non existent), and have to be replaced anyway a couple of years after
purchase, because our industry says, there is something newer and
better, which of course isn't compatible.
In short, most people nowadays probably have a love/hate relationship to
their electronics products. We have to have a PC, cell phone, TV set and
so on, but that is more a necessaty than anything you really like to
have. Hence, people and their politicians have a rather negative
attitude towards electronics, so it's easy to make an RoHS directive.
Compare it to cars, people are much happier for the cars than for their
PC - just a coincidence, that automotive electronics is exempt from
RoHS???
Still I challenge the non availability of parts due to RoHS as urban
legend. So far I haven't found anything which you can't get any longer
because RoHS has made it impossible.
If at all, then I believe that vendors have used RoHS as a good excuse
to cease production of non profitable components, whithout risking a bad
reputation. (Possibly the case with Philips' HV diodes). But everything
which is profitable is also available as RoHS compliant component. I
can't see the difference to the obsolecence problem in general.
Known problems? What are you referring to? I don't know of any part
problems.
Tin whiskers? Well this is a production problem and sorry, I can't see
the difference - Production problems are widely accepted, if one can
earn money, by moving production to China and using crappy South/East
Asian parts (caps etc.). The end user doesn't care whether his product
fails, due to tin whiskers or profit-optimizing production methods.
Cheers,
Klaus
Absolutely!
Just do not try to sell it in Europe.
[snip]The lead was only a very small percentage of the material in the paint. I
would doubt that it would contribute noticeably to the weight.