From: Larry Miller ([email protected])
Date: Mon May 21 2001 - 11:13:14 PDT
Sticky pads from Bishop Graphics; precision grids (for the light table) from
Bofors.
I still have some of these in storage if anybody needs 'em. No warrantee on
the adhesive, though. Also very big for two-sided boards was red and blue
tape. You could do color separations in making the films.
Before that was RubyLith. The first (single-sided) boards we did at Ampex
had traces cut from the solid (red) sheets with X-Acto knives. I think this
stuff is still used in magazine artwork, though it may have disappeared even
from there.
I wonder what happened to the giant view cameras used to reduce the artwork
to film. Some of those were pretty amazing (pre-Gerber days), custom-built
and very expensive with HUGE lenses. One thing in particular I remember was
an oscillatory film plate holder to move the film in a circle for anti-pad
clearance. Ground planes were a very extra-cost item.
And of course before the Shipley process for plating through holes you had
two-sided boards with vias made from swaged eyelets.
Mollycoddled youth!
Larry
-----Original Message-----
From: Greim, Michael [mailto:[email protected]]
Sent: Monday, May 21, 2001 9:57 AM
To: 'Ken Cantrell'; Ingraham, Andrew; [email protected]
Subject: RE: [SI-LIST] : MECL System Design Handbook
Don't forget those lovely donuts and a nice sharp
exacto knife for those properly mitered corners.
Kids have it so easy nowadays. Sheer luxury I tell you.
When I was a young man I had to tape boards in waist deep
snow, standing barefoot on broken glass uphill in both
directions. I digress.........
obligatory 8-)
Best Regards,
Michael C. Greim Sonus Networks
[email protected] 978-589-8336
Making the world safe for digital signals everywhere
And all this science I don't understand
It's just my job six days a week
The time is gone. The email's over
Thought I'd something more to say......
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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