[hpsdr] Warning on Atlas! NO HIGH TEMP WORK!

[David Proctor]

I may well be unduly sceptical but I suspect the PCB community are doing a
hardware version of theY2k scare to justify all sorts of extra
work/expense.

David
F5VHI


On 6/18/06, Leon Heller <leon.heller at bulldoghome.com> wrote:
>
>   ----- Original Message -----
> *From:* David Proctor <d.c.proctor at gmail.com>
> *To:* High Performance Software Defined Radio Discussion List
> <hpsdr at hpsdr.org>
> *Sent:* Sunday, June 18, 2006 9:54 AM
> *Subject:* Re: [hpsdr] Warning on Atlas! NO HIGH TEMP WORK!
>
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>  ------------------------------
>
>
>  This months IET review (used to be called IEE review) has an article
> about this very subject.
>
> "...laminates - even those that pass the stringent FR4 test for quality -
> are generally unable to withstand the much higher temperatures for lead free
> solders..."
>
> However this is written by a rep from the PCB industry who may just (and I
> am being cynical here) be trying to justify higher spec/cost processes.
>
> In any event I shall be happy to manually add my own 60/40 to these boards
> and heartily thank all those (particularly the select few) who are
> organising this project and carrying it forwards.
>
>
>
> I don't understand that. It isn't "much higher", it's only a few degrees.
> I just had a look at this Altera document:
>
> http://www.altera.com/literature/an/an353.pdf
>
> which confirms it.
>
> 73, Leon
>
>
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