I think I might still have a photomask somewhere in my room. 90's vintage.
--------------------------
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----- Original Message -----
From: Inge Hernefjord [mailto:[log in to unmask]]
Sent: Tuesday, October 08, 2013 05:44 PM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [TN] NTC for today
Imagine designing a modern IC processor chip with that handcraft method.
You would need a film large as a baseball court.
Inge
On 8 October 2013 08:50, Ed Popielarski <[log in to unmask]> wrote:
> Yup! I laid out many PCB's with Bishop Graphics black tape, mylar with a
> precision grid and light table below it with a red/blue pencil drawing to
> follow. Good ole' days for sure!
>
> Ed Popielarski
> Engineering Manager
>
>
> 970 NE 21st Ct.
> Oak Harbor, Wa. 98277
>
> Ph: 360-675-1322
> Fx: 206-624-0965
> Cl: 949-581-6601
>
>
> https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
> Sent: Sunday, October 06, 2013 2:10 PM
> To: [log in to unmask]
> Subject: Re: [TN] NTC for today
>
> I made my first circuit by hand. Used scalpel and X-film, half sq meter
> and crimped it in the photolab to 1x2 inches. It was a trigger circuit for
> laser guided missiles. We produced over 50,000 of them. That was before we
> bought the X-Acto table. We used both hands and heads. Now quarter of head
> and index finger....
>
>
>
> On 5 October 2013 23:39, Robert Kondner <[log in to unmask]> wrote:
>
> > "Computers were simple then"
> >
> > Did computers really get more complex or just more transistors? :-)
> >
> > I kind of like the comparison of chemical cameras (film or glass
> > plate with silver compounds) to digital cameras when compare
> > complexity. I mean the effect of electronics on photography has indeed
> > been a revolution. But actually, if you think of tiny grains for
> > silver in emulsion as electrochemical pixels you do see that old film
> > was not that "Super Simple", it was just easier to manufacture with
> > simple tools.
> >
> > I also marvel at that Apollo computer, and the fact the tools back
> > then for designing PCBs were rubylith and X-Acto knives. Like the
> > pyramids there are simply ideas that take tremendous engineering efforts
> to make happen.
> >
> > Bob K.
> >
> >
> >
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
> > Sent: Saturday, October 05, 2013 5:13 PM
> > To: [log in to unmask]
> > Subject: Re: [TN] NTC for today
> >
> > I'm afraid it's not a space plane but just a plan.
> > Actually, there is something I always wonder about. Go back to Neil
> > Amstrong and that time...Apollo, for instance. The computers at that
> > time were simple, compared to today's machines. I know, because I
> > passed a glass box every day before I entered the clean rooms. In that
> > box was Apollo's main computer, which we built. Lot's of transistors,
> > most TO-18 and TO-5.
> > Specked with 2N1893, 2121, 2902, which were very popular. Back to the
> > path.....as I said, very simple stuff. The main functions were 'small
> > push/pull rockets and main rockets, as long as the service module and
> > the astronaut capsule were together. And communication radios. And
> > sensors of various nature...but in alles rather uncomplicated
> > electronics. My
> > question: The central station in Houston was a large room with lots
> > and lots of work stations. A hundred persons "worked" there, all with
> > their noses close to the many large computer displays.Why was it
> > necessary with such many work stations?
> >
> > Inge
> >
> >
> > On 5 October 2013 20:13, Steven Creswick <[log in to unmask]>
> > wrote:
> >
> > > Hey,
> > >
> > >
> > >
> > > I read somewhere that Sweden is making a spaceplane. How about a
> > > ride on that, and play the Blue Danube?!!!
> > >
> > >
> > >
> > > Have a good time cruising!
> > >
> > >
> > >
> > > steve
> > >
> > >
> > >
> > > From: Inge Hernefjord [mailto:[log in to unmask]]
> > > Sent: Saturday, October 05, 2013 1:17 PM
> > > To: TechNet E-Mail Forum; Steven Creswick
> > > Subject: Re: [TN] NTC for today
> > >
> > >
> > >
> > > Thank you, buddy,
> > > take care ya'self.
> > >
> > > Inge
> > >
> > >
> > >
> > > On 5 October 2013 02:43, Steven Creswick <[log in to unmask]>
> > > wrote:
> > >
> > > It's probably already tomorrow there, but happy belated birthday Inge!
> > >
> > > Steve
> > >
> > >
> > > -----Original Message-----
> > > From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Popielarski
> > > Sent: Friday, October 04, 2013 3:32 PM
> > > To: [log in to unmask]
> > > Subject: [TN] NTC for today
> > >
> > > It's Ingemar Hernefjord's birthday today!
> > >
> > > Happy Birthday, Inge!
> > >
> > > Ed Popielarski
> > > Engineering Manager
> > >
> > > [Description: FullLogo]
> > > 970 NE 21st Ct.
> > > Oak Harbor, Wa. 98277
> > >
> > > Ph: 360-675-1322
> > > Fx: 206-624-0965
> > > Cl: 949-581-6601
> > >
> > > https://maps.google.com/maps/myplaces?hl=en
> > > <
> > >
> > https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&s
> > pn=0
> > .
> > > 011188,0.033023&ctz=420&t=m&z=16&iwloc=A>
> > > &ll=48.315753,-122.643578&spn=0.0
> > > 11188,0.033023&ctz=420&t=m&z=16&iwloc=A
> > >
> > >
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