Good idea Andy : I presume a pretty level landscape on that card you did ?

Here's your steak :

We have this SM electrolyte cans on (and a pretty heat hungry choke) ;
about 1/2" dia and height ; with couple of tiny legs nicely shaded on sides
;
I'm on 230 already ; any higher and I have a pop corn oven !
Any lower and they droll off !
Pushing memory strips around will not give you real life picture mate .

paul


PS

you take a rotten piece of buffalo ; bolt it down one end of 30 foot long
cage ;
and just wait by for the saltie to crawl in ......... 


-----Original Message-----
From: Andy Mackie [mailto:[log in to unmask]]
Sent: Friday, 30 July 1999 0:58
To: [log in to unmask]
Subject: [LF] Cat among pigeons...


I'm amazed that there is still this concern about the requirement for
high-temperature stability of components. One of the conclusions from the
IDEALS
consortium was that it was possible to do reflow with a spike minimum of
225-230°C. Even with a wave set to 260°C, the top side temperature shouldn't
reach over 230°C, so what am I missing here?

We've just done some reflow work with 95.5Sn/Cu0.5/Ag4 that shows that you
get
the same wetting/spreading area on copper if you have a 230°C spike with 30
secs
over 217°C or a 250°C spike with 60 secs over the m.p. The extra buys you
nothing.

I must buy a new beef-locator, 'cos I can't find any...

Andy

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