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Select few are those with full access to microscopes, hot air stations,
work facilities, and good eyesight that could put together a board, and
is of no consequence if a oven can't be used.<br><br>
The email said specifically<br>
"<br>
<font face="Arial, Helvetica" size=2>WARNIING <br>
<br>
DO NOT! Rework Atlas in an elevated temperature environment, like ovens!!
<br><br>
</font>Nothing mentioned later as a possible reason...etc, just don't use
an oven. I on the other hand do not have access to any such facilities
and have very poor vision, the only possible way of doing the board is
through the use of an oven.<br><br>
So if you saw red, so did I and I have another email that I have
re-written several times in answer but have not sent. With that
limitation that was given to me I felt it that I just wasted my
money and time.<br><br>
<br>
At 05:36 PM 6/17/2006, you wrote:<br>
<blockquote type=cite class=cite cite="">***** High Performance Software
Defined Radio Discussion List *****<br><br>
On 6/17/06, Lyle Johnson <kk7p@wavecable.com> wrote:<br>
> ***** High Performance Software Defined Radio Discussion List
*****<br>
><br>
> Folks,<br>
><br>
> There has been a big misunderstanding.<br>
><br>
> The Atlas PCBs are standard FR4 fiberglass PCB boards, made
with<br>
> standard FR4 materials and are suitable for normal PCB
manufacturing<br>
> processes.<br>
><br>
> Don't worry about it.<br>
><br>
> The boards are gold plated rather than solder plated so they
meet<br>
> European RoHS standards. That makes it possible to legally
import them<br>
> to Europe if they arrive after July 1st, 2006.<br>
><br>
> RoHS compliant manufacturing methods use lead-free solder, which
often<br>
> requires a higher temperature manufacturing process. PC boards
are<br>
> usually made of one of several special fiberglass laminates designed
to<br>
> withstand prolonged exposure to the higher temperatures required to
use<br>
> such solder in a normal manufacturing process.<br>
><br>
> The Atlas boards are *not* made of such special, *high
temperature*<br>
> fiberglass material, so they are not suitable for use in many
RoHS<br>
> compliant manufacturing processes.<br>
><br>
> They are just normal PC boards that happen to be gold plated rather
than<br>
> solder-plated.<br>
><br>
> Nothing more and certainly nothing less.<br>
><br>
> > One question, why? A board with SMT components but can't take
SMT<br>
> > soldering temperatures, that is bizarre.<br>
><br>
> Of course it is bizarre.<br>
><br>
> Which clearly indicates that there is a misunderstanding.<br>
><br>
> Why automatically assume the worst?<br>
><br>
> It is in no one's best interest to fabricate and distribute
useless<br>
> boards. Especially not Eric's, who has underwritten the entire
cost of<br>
> producing the boards from his personal savings, for the benefit of
the<br>
> HPSDR community.<br>
><br>
> He simply warned that these were not *high temperature* boards; he
did<br>
> *not* say they would not withstand *normal* manufacturing
processes.<br>
><br>
> > Or a decision made by a select few.<br>
><br>
> I'm saddened that anyone posting to this list would even entertain
this<br>
> type of thinking, much less express it publicly. What possible
benefit<br>
> accrues to the "select few" -- whoever that means -- to
produce and<br>
> distribute inferior PC boards?<br>
><br>
> > By the way the fiberglass can take it, it's the glue that likes
to melt<br>
> > and let go of the layers.<br>
><br>
> Yes, it is called delamination.<br>
><br>
> > I do hope that future boards full of SMT components are going
to use<br>
> > epoxy rated for SMT work.<br>
><br>
> Any process that works with the FR4 fiberglass we have all used for
the<br>
> past few decades in PC boards, will work with these boards.
The<br>
> fiberglass is exactly the same.<br>
><br>
> The sky is not falling down.<br>
><br>
> 73,<br>
><br>
> Lyle KK7P<br><br>
Hi Lyle,<br><br>
Thanks for the clarification. You were able to respond to
this is a<br>
calm and cool manner to correct the misunderstanding. I had to<br>
rewrite my earlier response three times, because of the "decision
made<br>
by a select few" comment which immediately made me see red...
:-)<br><br>
Thank goodness that most people mellow with age (me being one of<br>
them). 10 years ago my response to comments like this would have
been<br>
quite different ;-)<br>
<br>
73 de Phil N8VB<br>
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