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How CERN made circuit boards in the 1970s
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Berni:
What is even more impressive are the hand layout boards in consumer electronics from back then. They offten have every last cm2 squezed out of the layout. That is hard work on big complex boards even in CAD, so i can't even imagine how that was like back then. They had no way to easily move paet of the design over by a few mm just to squeze a extra trace or two trough there. Rip it all up
SilverSolder:

--- Quote from: Berni on June 22, 2020, 02:58:58 pm ---What is even more impressive are the hand layout boards in consumer electronics from back then. They offten have every last cm2 squezed out of the layout. That is hard work on big complex boards even in CAD, so i can't even imagine how that was like back then. They had no way to easily move paet of the design over by a few mm just to squeze a extra trace or two trough there. Rip it all up

--- End quote ---

You might do several generations of draft layouts using pencil and rubber eraser, before attacking the Letraset kit?  Then you could use a light board to lay the actual traces.
TimFox:
One important detail about hand-taped PCB layouts is that they were done on precision-gridded Mylar substrate material (Bishop Graphics was one source).  From about 40 years ago, before computer drafting was common, I remember a problem when a PCB layout on Mylar and a mechanical layout done on Clearprint drafting vellum were combined:  the Clearprint material was not intended for precision applications and the total error over about 20 inches caused the mounting holes not to line up.
gdewitte:


I remember CAMAC: often fondly translated as "Committee to Arrange a Meeting in Another City"


Quote from: unitedatoms on June 13, 2020, 04:09:19 pm
Proves the fact that buses, interfaces, protocols and connectors live much longer than individual products.
It looks like a Kamak bus / formfactor for crates and racks.

We, as community owe the world the mechanical open hardware formfactor for miniature metal enclosure with power supply, backplane and firmware protocols, fire safety, mass produced at low cost to allow home made designs to be incrementally done at hobby's pace.

--- End quote ---


Labrat101:
wow nice pictures .
You could almost smell the old dust on those prints .
 Thanks brings back a few memories . we also had to make our own boards .
 Those old boards need to be put away for the future to remind Humans that things can be built to last by skilled hands.
 Great Minds that had nothing more than a pencil and a slide rule. .
 As you said ''No lets Google it. ''
 I still have my engineering slide Rule from the early 60's.
 Set it all up in your Garage  :-+

Nice  Work

RNS
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