Sorry, these pins are smaller: .056" - .068'. m
On Sun, May 30, 2021 at 6:02 PM Vincent Slyngstad < vincent.slyngs...@gmail.com> wrote: > On 5/30/2021 1:02 PM, Mike Stein wrote: > > What's the length and the diameters at each end of the pin? I've got > > some cables for Burroughs patch panels that might be useful. > > The pin diameter at the rounded tip is .093", a standard pin diameter. > It flares to 0.102" or so, over about 0.34" of length. The overall pin > length (including the insulation crimp/strain relief) is about 0.65". > > Also measured some patch cords (pin tip to pin tip): > Brown is 2.75". > Red is 4.75". > Orange is 6.75". > Yellow is 8.75". > Green is 16.5". > Subtract about an inch and a quarter for the length of the visible wire. > > There was also blue, though I don't have one to measure. My notes > remind me that the blue looks about an inch or so longer than green, > based on the cover photo of the manual. At that length it will > comfortably reach across the device, whereas the green is just a little > short for that. > > Found in my old notes: > The DEC 12-03498 was a #41675 taper pin. > Similar AMP taper pins: > 42107 "88" series will fit. > 42279 is similar, though obsolete. > > My old notes also suggest higher quantities for the patch cords; 100 of > them all together: > B 20 > R 30 > O 25 > Y 20 > G 10 > B 2 > > Vince > > > On Sun, May 30, 2021 at 3:40 PM Vincent Slyngstad via cctalk > > <cctalk@classiccmp.org <mailto:cctalk@classiccmp.org>> wrote: > > > > On 5/30/2021 10:54 AM, Ethan Dicks wrote: > > > On Sun, May 30, 2021 at 11:42 AM Vincent Slyngstad via cctalk > > > <cctalk@classiccmp.org <mailto:cctalk@classiccmp.org>> wrote: > > >> https://so-much-stuff.com/pdp8/computerlab/computerlab.php > > <https://so-much-stuff.com/pdp8/computerlab/computerlab.php> > > >> The photos get a little bigger if you click them. Those bits of > > stamped > > >> brass or whatever they are made of were probably pennies each. > > > > > > I've thought about what it might take to manufacture a pair of > steel > > > rollers that could stamp those out but I haven't gotten very far > with > > > it. Same idea for the backplane bus strip DEC used to sell on the > > > roll. > > > > > > Depending on level of detail, either a small CNC or possibly a > wire > > > EDM could make the dies. > > > > I thought about machining a ram to deform an existing modern pin (or > > even just tubing) to create the taper. > > > > I also tried to cast some out of solder, but they had bubbles and > > were a > > little too soft (tin-lead solder). Also, with a solder connection > you > > really need a good strain relief. At some point it's too much work > for > > what you're accomplishing (and still not very authentic). > > > > Vince > > > >