From: David Instone ([email protected])
Date: Mon May 21 2001 - 08:19:27 PDT
Just for info I actually have the second edition dated Dec 1972. It was
fig 7.17 then as well, but on page 138. On page 86 there is a photo of
a two sided board with traces that look about 0.05" and on page 98 the
artwork for a typical MECL III board with 5 (yes five) layers. (still
can't understand why modern pcb vendors don't like doing an odd number
of layers.)
I still refer to it, and Andrew is right, in those days people,
including myself, did lay out their own boards with sticky black tape.
Dave
Ken Cantrell wrote:
>
> That was during the westward migration in covered wagons wasn't it?
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Ingraham, Andrew
> Sent: Friday, May 18, 2001 8:53 PM
> To: [email protected]
> Subject: RE: [SI-LIST] : MECL System Design Handbook
>
> > (Don't forget, the revision date on the hanbook, or at least on the PDF
> > I downloaded, is 1988.) ...
>
> My hardcopy version of the handbook (which I can't find right now) is older
> than that.
>
> Some of the research work is probably from the 1970's. Many ECL boards back
> then were simple double-sided (2-layer) with ground plane on one side and
> signals on the other, hand routed using sticky black tape for the traces.
>
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-- RegardsDave Instone. Compliance Engineer Storage Systems Development, MP24/22 Xyratex, Langstone Rd., Havant, Hampshire, P09 1SA, UK. Tel: +44 (0)23-92-496862 (direct line) Fax: +44 (0)23-92-496014 http://www.xyratex.com Tel: +44 (0)23-92-496000
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