Re: Re: DEC PDP-8/e H212 core mat repair

2021-07-20 Thread Richard Milward via cctalk
Going by the size, I'd say the Keronix board is for a Data General Nova or one of its ilk. Keronix did make core boards with p/n starting 816 for Novas. **Richard Message: 1 Date: Mon, 19 Jul 2021 16:50:10 -0500 From: Jules Richardson To:cctalk@classiccmp.org Subject: Re: DEC PDP-8/e H212

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Toby Thain via cctalk
On 2021-07-19 6:06 p.m., Rod Smallwood via cctalk wrote: > > Yes most core stringing was outsourced. > There's more detail on early core production in the book "IBM's Early Computers", iirc. (And possibly "A Few Good Men From Univac".) > ... > Rod Smallwood   -- Digital Equipment Corporation 

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Rod Smallwood via cctalk
Yes most core stringing was outsourced. By hand under magnification was used. I cant recall any references to automation. That would br down to the supplier. The story I heard was at least some were done by embroidery girls in Hong Kong Rod Smallwood   -- Digital Equipment Corporation  19

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Jules Richardson via cctalk
On 7/19/21 3:40 AM, Joshua Rice via cctalk wrote: I believe much of the core manufacturing for DEC minicomputers was outsourced, but a lot of it had become much more automated by the late 60's and early 70's. I've got a trio of planes here, two of which are from a Lockheed MAC-16, but the oth

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Tom Hunter via cctalk
< cctalk@classiccmp.org> wrote: > > > > -- Original Message -- > From: "Tom Hunter via cctalk" > To: "General Discussion: On-Topic and Off-Topic Posts" > > Sent: Monday, 19 Jul, 2021 At 06:33 > Subject: DEC PDP-8/e H212 core mat re

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Joshua Rice via cctalk
-- Original Message -- From: "Tom Hunter via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Monday, 19 Jul, 2021 At 06:33 Subject: DEC PDP-8/e H212 core mat repair I am curious if anyone has attempted to repair (replace) a broken wir

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Joshua Rice via cctalk
-- Original Message -- From: "Tom Hunter via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Monday, 19 Jul, 2021 At 06:33 Subject: DEC PDP-8/e H212 core mat repair I am curious if anyone has attempted to repair (replace) a broken wir

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Steve Malikoff via cctalk
Tom said > I am curious if anyone has attempted to repair (replace) a broken wire in a > PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible without > a microscope. I cannot imagine how these were even manufactured and wonder > if DEC service centers repaired core mat faults or if f

DEC PDP-8/e H212 core mat repair

2021-07-18 Thread Tom Hunter via cctalk
I am curious if anyone has attempted to repair (replace) a broken wire in a PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible without a microscope. I cannot imagine how these were even manufactured and wonder if DEC service centers repaired core mat faults or if faulty boards were