I did all my proto type in one hundred thousand center drill phenolic material. Then create layout as described below and have first card fabricated. What fun that was. Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Popielarski Sent: Tuesday, October 08, 2013 10:51 AM To: [log in to unmask] Subject: Re: [TN] NTC for today 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 > > > > > > ____________________________________________________________________ > > __ This email has been scanned by the Symantec Email Security.cloud > > service. > > For more information please contact helpdesk at x2960 or > > [log in to unmask] > > ____________________________________________________________________ > > __ > > > > > > ____________________________________________________________________ > > __ This email has been scanned by the Symantec Email Security.cloud > > service. > > For more information please contact helpdesk at x2960 or > > [log in to unmask] > > ____________________________________________________________________ > > __ > > > > > > > > > > > > ____________________________________________________________________ > > __ This email has been scanned by the Symantec Email Security.cloud > > service. > > For more information please contact helpdesk at x2960 or > > [log in to unmask] > > ____________________________________________________________________ > > __ > > > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. 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