[cctalk] Re: Papertape-Reader Decitek 442A9: need manual/schematics

Decitek is still in business, so try decitek.com > On May 16, 2024, at 10:13 AM, Michael Fritsch via cctalk > wrote: > > I have a Decitek 442A9 papertape reader which needs repair. > > I have already replaced the belt, but that is not enough. The reader behaves > very strangely. It starts

[cctalk] Re: Random items on Pascal #3

I have a source code tape for Pascal on a CDC 6600 from CDC in France. I am not sure which version it is. On Thu, May 9, 2024 at 6:43 PM Chuck Guzis via cctalk wrote: > On 5/9/24 15:10, Fred Cisin via cctalk wrote: > >>> Turbo-Pascal was quite popular. At the annnouncement of it (West > >>>

[cctalk] Re: saving old technology [was: Recordak Magnaprint Microfiche Printer Free]

Most modern Diesel engines use a common-rail electronically controlled injection system. > On May 8, 2024, at 8:58 AM, Paul Koning via cctalk > wrote: > > > >> On May 8, 2024, at 7:56 AM, CAREY SCHUG via cctalk >> wrote: >> >> At a local linux meeting, the leader was disparaging any

[cctalk] Re: Other input devices.

> > On Apr 12, 2024, at 9:55 PM, ben via cctalk > wrote: > > > > Did any one ever use a keyboard to magtape as input device? > > My wife did, sort of: for a while she worked with IBM MT/ST word > processors. Those were very early word processing systems that used a > custom magnetic tape

[cctalk] Re: Cleanup time again

Clean the connectors and reseat the socketed chips and it will probably work. > On Apr 11, 2024, at 1:55 PM, Bill Gunshannon via cctalk > wrote: > > > > One last shot. > > I have an RX Floppy disk unit. Worked fine until one > time the last time I had it hooked up and after about > an

[cctalk] Re: PDP-11 thingy. What is it?

The backplane says that it is for a PDP-11/03 The chassis is missing the power supply. The M8189 is a PDP-11/23+ KDF11-B PDP-11 CPU The FC202 is a Charles River Data Floppy Diskette board https://shop-pdp.net/~stuff/Pictures/index.php?dslct=/CRDS_FC-202_Floppy_Disk_Controller=0=0=0 On Wed, Apr

[cctalk] Re: oscilloscopes

DEC used Tektronix R503 scopes for a display on many of their early machines. On Wed, Apr 3, 2024 at 11:16 AM Paul Koning via cctalk < cctalk@classiccmp.org> wrote: > > > > On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk < > cctalk@classiccmp.org> wrote: > > > > Vintage computer enthusiasts

[cctalk] Re: DEC Processor Books

A photographer wandered around my workplace looking at all of the men's hands. They were doing a closeup shot and needed just hands. More than a little strange. On Mon, Mar 18, 2024, 6:15 AM Norman Jaffe via cctalk wrote: > I had the same experience while working for a (very) small company

[cctalk] Re: DEC Processor Books

Some of the pictures were staged in a parking lot. They probably didn’t have a room big enough. > On Mar 17, 2024, at 10:55 AM, Paul Koning via cctalk > wrote: > > > >> On Mar 17, 2024, at 10:13 AM, Bill Gunshannon via cctalk >> wrote: >> >> >> I have often wondered about the people we

[cctalk] Re: Qume 842 8" Disk Drive Question

Connect an oscilloscope to the output of the single-sided sensor and see if it works. If so, trace the signal through the logic and see if it gets to the I/O connector that goes to the greaseweazel. On Wed, Jan 31, 2024 at 2:38 PM Mike Katz via cctalk wrote: > I have recently acquired a Qume

[cctalk] Re: Vmebus

I have a Sun3E VMEbus system. It is a Sun3/60 split into five 6Ux160 VMEbus boards. On Wed, Jan 31, 2024 at 8:57 AM Bill Degnan via cctalk < cctalk@classiccmp.org> wrote: > Sorry, that is the old FAQ and may not be correct, here is a newer page >

[cctalk] Re: 11/15, 11/20 systems and parts, more

The RICM got a complete 11/20 donation a few weeks ago, so we no longer need parts to complete the empty chassis. On Sun, Jan 28, 2024, 11:37 PM Paul Anderson via cctalk < cctalk@classiccmp.org> wrote: > A quick update: The seller and I have not been able to reach a deal on any > of this. He is

[cctalk] Re: Anyone have a D1 deck?

You could contact https://www.wmbt.org/ to see if they have a Bosch or Sony DEC to read the tapes. > On Dec 31, 2023, at 8:58 PM, Zane Healy via cctalk > wrote: > >> On Dec 31, 2023, at 1:42 PM, The Doctor via cctalk >> wrote: >> >> On Saturday, December 30th, 2023 at 23:24, Chuck Guzis

[cctalk] Re: 11/15, 11/20 systems and parts, more

20, 2023 at 3:58 AM Michael Thompson via cctalk < > cctalk@classiccmp.org> wrote: > > > The RICM has an empty 11/20 chassis and the power supply. All it needs is > > the processor backplanes. Is there any chance you have a set of > backplanes > > available? &g

[cctalk] Re: 11/15, 11/20 systems and parts, more

The RICM has an empty 11/20 chassis and the power supply. All it needs is the processor backplanes. Is there any chance you have a set of backplanes available? On Fri, Oct 20, 2023, 2:35 AM devin davison via cctalk < cctalk@classiccmp.org> wrote: > I have a few systems in rough shape, and need

[cctalk] Re: Comparing PDP-8 processor flipchip

I have seen lots of small differences between machines with no real explanation of why. > On Sep 12, 2023, at 10:11 AM, Bill Degnan via cctalk > wrote: > > The recent Ebay auction for the original PDP-8 got my attention because one > of the photos (the processor logic flipchip array) is a

[cctalk] Re: Apple 1

> No one collects cloud servers, the things that do > the real work and storage. Will they? Google's first server is in the Computer History Museum... On Sat, Aug 5, 2023 at 8:54 AM Bill Degnan via cctalk wrote: > Something has to be the most sought-after thing in every collectors' > hobby.

Re: Comtec model P135-20/35 Paper Tape Punch

Comtec was a tiny Rhode Island company that was owned by the family that used to live across the street from me. The RICM has a PDP-8/L powered document scanner that has a Comtec paper tape reader inside. Comtec was eventually bought by Zebra, another Rhode Island company that started out making

Re: DECTape head problem

> > > Date: Tue, 8 Feb 2022 20:55:31 + > From: Wayne S > Subject: Re: DECTape head problem > > So it serms dectape heads are special. I don?t think Dec would have the > desire to make them internally so they probably contractef with a company > already set up to do that. Who were the big tape

Re: DECTape head problem

DECtapes have 5x redundant tracks. If you could find an 8-track head that had the same track pitch, and maybe track width, you could read the tape but lose redundancy on the Mark and Timing tracks. That probably would not work with a marginal DECtape. On Mon, Feb 7, 2022 at 3:33 PM Wayne S

Re: DECTape head problem

> > From: Gary Oliver > Subject: DECTape head problem > > In debugging my DECtape interface lashup, I found that one of my head > has two open windings.? Specifically, one channel has an open 'ground' > with the other two lines apparently the full winding of the channel.? > The second channel

Re: 11/785 on ebay (2018) - was Re: VAX 780 on eBay

> > > Date: Mon, 3 Jan 2022 11:39:01 -0500 > From: Chris Zach > > The thing that always made me wonder is where are all the 8600's. The > 8600 was apparently the best selling large Vax, outselling the 780 and > 750, so what happened to all of them? They weren't any bigger than a 780... > > C >

Re: Source for DEC TC01 (and similar) bulbs?

On Sun, Dec 5, 2021 at 11:46 PM Josh Dersch wrote: > I swapped boards around in the datapath for these bits on the TC01 side > last night and the problem doesn't move. On a whim I put my thumb on the > tape as it passes over the head and it seems to affect the glitchiness of > the data, at

Re: Source for DEC TC01 (and similar) bulbs?

> > > From: Josh Dersch > Subject: Source for DEC TC01 (and similar) bulbs? > > The Search Scope loop diagnostic shows block numbers going by in both > directions so a lot of the drive and controller are working, but there's > some glitchiness in bits 2, 5, 8, and 11 of the data so I need to

Re: Sun-2 and Sun-3 mice (eBay)

> > AFAIK, the posts are there so you don't plug your mouse into a phone > jack or a modem port. There are cutouts on the back of the Sun3 > keyboard to admit that connector. > My Sun 2/120 server has an RJ mouse connector next to the RJ keyboard connector on the back of the chassis. My Sun

Re: Looking for VAX6000 items (Paul Koning)

I believe that the CDC built RP04 has a three-phase spindle motor. > On Jul 15, 2021, at 5:13 PM, Paul Koning wrote: > > > >> On Jul 15, 2021, at 4:33 PM, Michael Thompson >> wrote: >> >> The power cord is three-phase, and actually daisy-chains to a second and >> third drive. The phases

Re: Looking for VAX6000 items (Paul Koning)

The power cord is three-phase, and actually daisy-chains to a second and third drive. The phases on the AC output connector are rotated to balance the load on all three phases when three drives are daisy-chained. If you look at the power wiring diagram on page 3-120 of the Memorex 677-01 manual

Re: Looking for VAX6000 items (Paul Koning)

> > From: Paul Koning > To: Chris Zach , "cctalk@classiccmp.org" > > Subject: Re: Looking for VAX6000 items > > A number of the large disk drives use 3 phase motors; RP04/5/6 are > examples as well. > > Three phase motors won't run on single phase power without help from run >

Re: PDP-8/I Negative-bus termination

> > Date: Wed, 5 May 2021 00:03:05 -0700 > From: Josh Dersch > Subject: PDP-8/I Negative-bus termination > > Hey all -- > > Until this point I've never had any peripherals for my negibus systems > (apart from teletypes), and it occurs to me that I have no idea if the bus > needs to be terminated

Re: Motor generator

> > Date: Wed, 5 May 2021 13:20:59 +0100 > From: > Subject: RE: Motor generator > > We had a Motor/Generator for our Honeywell L66. Not sure it was because it > wanted US voltages or just for a clean supply > Dave > I also worked on a Honeywell L66 that had two motor-generators. We used one at a

Re: IBM 1410 FPGA Implementation Update - new github repository

> > Date: Sun, 2 May 2021 15:38:33 -0500 > From: Jay Jaeger > Subject: IBM 1410 FPGA Implementation Update - new github repository > Message-ID: <68c06711-e563-f1bf-8abc-090793bed...@charter.net> > > The last 12 months I have been pretty busy working on my 1410 in FPGA > project, and there is now

Re: DEC RF08/RS08 module placement info

I sent Josh pictures of the complete RF08/RS08 that John Wilson donated to the RICM. I will send detailed pictures of the RS08<->RF08 cables next week. -- Michael Thompson

Re: DEC PDP-11/45 backplane +5 ECO

> > > On 4/24/21 10:28 PM, Noel Chiappa via cctalk wrote: > > Noel > > > > PS: I wonder how many people here have -11/45's? ISTR one other, but > they aren't > > common. The Rhode Island Computer Museum has two. The pair were the interface between fire pull boxes and the 911 dispatch

Re: DECtape ancestry (Kyle Owen)

> > Date: Sat, 20 Mar 2021 16:21:44 -0400 > From: Kyle Owen > Subject: Re: DECtape ancestry > > What systems took advantage of the bidirectional nature? > > Kyle > ADSS on the PDP-9 does an interleave of 6 when reading/writing to the DECtape. If it runs off the end it reverses direction and

Re: Massbus - was: Re: VAX 11/750

The PDP-10 KL10 at the RCS/RI was used to control a real-time flight simulator at Sikorski. It had one of the RH20 Massbus controllers connected to a DTR01 cabinet holding a DR01 chassis. The DR01 was, I think, connected to a DR11 chassis that had A/D and D/A converters boards inside. You could

Re: Flip-Chip selloff (Al Kossow)

> > > Date: Tue, 2 Feb 2021 09:19:08 -0800 > From: Al Kossow > Subject: Flip-Chip selloff > > I don't have any equipment that uses them any more, so I'll be ebaying off > my > A-W series flip chips over the next few days. The W's and PT08 boards are > up now > >

Re: Sun/3-powered 737 flight sim

I have also seen the SCSI terminator power fuse blow when the terminator is hot plugged. On Mon, Aug 17, 2020 at 7:26 PM Chris Hanson wrote: > On Aug 17, 2020, at 10:52 AM, Michael Thompson via cctalk < > cctalk@classiccmp.org> wrote: > > > > I have a Sun 3/E, includi

Re: Sun/3-powered 737 flight sim

> > Date: Mon, 17 Aug 2020 00:22:52 -0700 > From: Brendan Shanks > Subject: Sun/3-powered 737 flight sim > > Something that I thought the folks here would appreciate: a fellow in > Dubai is trying to keep a full-motion Boeing 737-300 sim (from 1991) > running. > The main host machine is a Sun/3E,

Re: Burroughs L-series paper tapes

There is a B800 at the RICM, but nothing larger. > On Aug 5, 2020, at 1:00 PM, cctech-requ...@classiccmp.org wrote: > > Burroughs L-series paper tapes

Re: cray unicos cds sold on ebay in 2016

> > Date: Sat, 11 Jul 2020 15:17:06 -0400 (EDT) > From: Ethan O'Toole > Subject: Re: cray unicos cds sold on ebay in 2016 > > I have Unicos 10.0.0.1 and 10.0.0.2 but when I boot it I get a kernel > panic. Seems to be around drivers for ATM. My system has a lot of HIPPI > interfaces, no ATM. > >

Re: Early Nubus history

> > Date: Sat, 23 May 2020 07:07:52 -0700 > From: Al Kossow > Subject: Early Nubus history > > Did anyone ever do any research into the early history of Nubus, wrt > Western Digital, TI or Steve Ward/MIT/Numachine? > I was a member of the IEEE-1196 committee that wrote the NuBus standard and

Re: Wanting some help with a PDP-8/a

> > From: Bryan Longram > Subject: Wanting some help with a PDP-8/a > > I acquired a non-functional PDP-8/A several months ago and in that time > I've replaced all the outwardly damaged parts and have gotten the machine > to power on with no issues. However the problem I've been having now that I

Re: DIGI-COMP 1 enhanced (Joerg Hoppe)

> > From: Joerg Hoppe > Subject: DIGI-COMP 1 enhanced > > Guys, > > I added a motor drive to my DIGI-COMP I, and wrote 4 web pages about > that device. > > See http://www.retrocmp.com/articles/digi-comp-1/ > or just the video https://youtu.be/D6GgxXRJXnw > > best regards, > Joerg > That is very

Re: Unusual Punched Cards (Peter Van Peborgh)

> > Guys, > > I have been collecting all types of computer punched cards for a few years > now. In the distant past I actually used them! > > I am desperately looking for two types I do not have been able to find a > sample of: > * Jacquard fabric/carpet loom cards. OK, not computer but the

Re: RDI BriteLite

> Date: Thu, 5 Mar 2020 14:23:30 +0200 > From: Plamen Mihaylov > Subject: RDI BriteLite > > Does anyone have such machine ? I miss the PSU adapter as well as the Sbus > framebuffer which connects the LCD panel to the mainboard. Any info is > appreciated. > > Best regards, > Plamen > I have

Re: DEC flat cables

> > Date: Sat, 4 Jan 2020 08:57:40 -0500 > From: David Gesswein > Subject: DEC flat cables > >Has anyone found a good method for repairing the DEC flat cables? > The ones with flat wires with plastic laminated to each side. The glue > holding the plastic on fails and you end up with two

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

> > Date: Thu, 21 Nov 2019 22:13:30 -0500 > From: Chris Zach > Subject: Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1 > > One of my long term questions has been to see if a 2020 could talk to a > RM80. It should be possible as the Massbus personality module talks to > the bus at 3600 RPM just

Re: PBXes at home

> > Date: Thu, 19 Sep 2019 22:27:23 -0400 (EDT) > From: Ethan O'Toole > Subject: PBXes at home > > A number of years ago I picked up a Lucent Merlin Legend system. > > -- > : Ethan O'Toole > I have a little Merlin 410 PBX at home, with the Conference and Music on Hold plug-in modules. --

Re: cctalk Digest, Vol 59, Issue 13 (Curt Vendel)

> > Date: Wed, 14 Aug 2019 12:06:48 -0400 > From: Curt Vendel > To: cctalk@classiccmp.org > Subject: Re: cctalk Digest, Vol 59, Issue 13 > > Will... > > I?m still waiting for you and the Rhode Island Computer Society to get my > brand new in the box 9766, the Alignment disk platter, the box of

Re: looking for a 7-track reel tape controller

> > The same is true for the HP 7970B tape drives, I even have a 9-track 7970B > that can be switched between 200, 556 and 800 bpi. I only need a 7-track > head... > > Christian > The DEC TU20 tape drive is an HP 7975A 200, 556, and 800 BPI transport with additional electronics to to connect it

Re: looking for a 7-track reel tape controller

The same is true with the TU20. > On Aug 7, 2019, at 10:06 PM, Paul Anderson wrote: > > I think you could change heads in a TU10 and add or take out a few boards. > I've worked on 7 and 9 track versions in the day. > >> On Wed, Aug 7, 2019 at 6:43 PM Michael Thompson via cctech >> wrote: >>

Re: looking for a 7-track reel tape controller

> > thanks a lot for your hint to the DEC controller. I wasn't aware that the > TM11, TMA11 and TMB11 controllers can handle 9-track as well as 7-track > NRZI-encoded tape drives. However, all these controllers seem to be very > rare in the public out there. Not too surprising considering that DEC

Re: looking for a 7-track reel tape controller

> > thanks a lot for your hint to the DEC controller. I wasn't aware that the >> TM11, TMA11 and TMB11 controllers can handle 9-track as well as 7-track >> NRZI-encoded tape drives. However, all these controllers seem to be very >> rare in the public out there. Not too surprising considering that

Re: IBM Series/1 (Kevin Bowling)

> > Date: Fri, 2 Aug 2019 12:40:58 -0700 > From: Kevin Bowling > Subject: IBM Series/1 > > Anyone have one of these? I'd like to find a system, but images of > the OS media would be interesting. > > Regards, > Kevin > The RICM has lots of Series/1 systems. They haven't been powered on for

Re: How to format Dectape (TC08 + TU56)

> > Date: Tue, 28 May 2019 21:21:43 -0700 > From: Marc Howard > Subject: How to format Dectape (TC08 + TU56) > > Hi, > > I fired up the 8/A tonight and the TU56's are failing diags. I want to > format a tape for scratch use but I can't find the MAINDEC that does this > (along with flipping up

Re: sun model 47. code 4/40 does it have the nvram with battery?

> > Date: Sun, 2 Dec 2018 16:49:37 -0800 > From: Alan Perry > Subject: Re: sun model 47. code 4/40 does it have the nvram with > battery? > > The RDI Britelite (laptop) is a SPARCstation IPX system board in a > laptop chassis. > I have IPC, IPX, and LX versions of the RDI Britelite. --

Re: Removing PVA from a CRT

> > Date: Mon, 19 Nov 2018 10:41:36 -0800 > From: Alan Perry > Subject: Removing PVA from a CRT > > I recently picked up a Rainbow 100. The PVA between the safety glass and > the CRT on VR201 that came with it has broken down and failed badly. > > I have seen videos and read about removing the

Re: PDP8/a Initial Power Up

> > Date: Fri, 02 Nov 2018 08:56:08 -0700 > From: Columbia Valley Maker Space > Subject: PDP8/a Initial Power Up > > Hello everyone - my first post, so be easy on me! > > I have just acquired a PDP8/a and a Remex punch tape reader. The unit > starts up and displays some data on the displays, and

Re: i860: Re: modern stuff

> > Date: Wed, 31 Oct 2018 14:29:18 -0700 > From: Eric Korpela > Subject: Re: i860: Re: modern stuff > > A Google search on Skybolt i860 produces interesting results. > >Additional realtime signal processing > > capability is provided by four Skybolt i860-based VMEbus single-board > > computers

Re: PDP, Data General & more (TV show Maniac)

> > Date: Wed, 31 Oct 2018 19:00:15 -0400 > From: Ethan Dicks > Subject: Re: PDP, Data General & more (TV show Maniac) > > Looks like a PDP-8/L to me, with a PC04 high-speed paper tape > punch/reader below it. > > -ethan > Like this 8/L? http://www.ricomputermuseum.org/Home/equipment/pdp-8-l

Re: i860: Re: modern stuff

> > From: Ken Seefried > Subject: i860: Re: modern stuff > >the i860 found at least a little niche on graphics boards, so somehow > >not a complete failure ;-) > > I have a Quad-i860 VME board in one of my Sun systems. Michael Thompson

Re: SPACEWAR! Switch Boxes for a PDP-12 (Bob Rosenbloom)

> > From: Bob Rosenbloom > Subject: Re: SPACEWAR! Switch Boxes for a PDP-12 > > How about these? They look close, but are still a bit expensive. > > >

SPACEWAR! Switch Boxes for a PDP-12

Visitors to the RICM like to play SPACEWAR! in the PDP-12. Unfortunately using the console switches is uncomfortable, not intuitive, and is tough on the switches. We would like to recreate the switch boxes used on the PDP-1 to make playing a better experience. We modified the source

Re: SPARCstation Voyager - Any history?

> > From: Steve Algernon > Subject: SPARCstation Voyager - Any history? > > Cleaning up a non-post?ing SPARCStation voyager 146 (are there others?) > and found a crude cat drawing on the silkscreen: > > https://twitter.com/salgernon/status/1029474524100616192?s=21 > > Just curious if anyone knows

Re: I ran across this strange modernistic? Data General ...odd?

It could be the Intel 8086 version. I need to look at the serial/model number tags. Sent from my iPhone > On May 23, 2018, at 1:46 AM, Lars Brinkhoff wrote: > > Michael Thompson wrote: >> I put a picture of the one at RICM here: >>

Re: I ran across this strange modernistic? Data General ...odd?

> > Date: Mon, 21 May 2018 21:01:59 -0400 > From: Michael Thompson > Subject: Re: I ran across this strange modernistic? Data General > ...odd? computer? > The RICM has one, but it is not on the WWW site. > > Michael Thompson > > I put a picture of the one

Re: I ran across this strange modernistic? Data General ...odd? computer?

> > Date: Sun, 20 May 2018 18:04:00 -0400 > From: Ed Sharpe > To: cctalk@classiccmp.org > Subject: I ran across this strange modernistic? Data General ...odd? > computer? > > While? in the warehouse I ran across this strange modernistic? Data > General ...odd?

Re: Sparc Laptops

> Date: Fri, 11 May 2018 23:11:57 -0500 > From: "Sam O'nella" > Subject: Re: Sparc Laptops > > Yes the IBMs are worth tracking down. I always keep my eye out but rarely > see them come up for sale but it'd be fun to have an RS/6000 that doesn't > cause a hernia to move. My

Re: Sparc Laptops

> > Date: Wed, 9 May 2018 13:08:51 -0400 > Subject: Re: Sparc Laptops > > I have a pretty cool DEC 486 laptop. I am unsure if they made a Pentium > laptop before they were bought out. > http://www.vintagecomputer.net/digital/DECpc_433SLC/ > DECpc_433SLC_Premium_open2.jpg > b > > On Wed, May 9,

Re: Visiting Boston - Classic computer recommendations (Huw Davies)

The KS10 is at my house, along with my DEC, SGI, and Sun collection. I have a DEUNA and another Unibus Ethernet board, but have not installed them. At the Lab, we have a PDP-12, and a PDP-8/I that are running. Sent from my iPhone > On Apr 27, 2018, at 1:30 AM, Lars Brinkhoff

Re: Visiting Boston - Classic computer recommendations (Huw Davies)

> > Date: Thu, 26 Apr 2018 19:17:18 +1000 > From: Huw Davies > Subject: Visiting Boston - Classic computer recommendations > > I?m in Boston MA (technically Canton) for the next three weeks (April 29 > to May 19). Looking for recommendations on classic

Re: PDP8 ALGOL

> > From: Charles Dickman > Subject: PDP8 ALGOL > > I have been looking at the available software for the PDP8, > particularly languages. I see there was an ALGOL. The source is > archived on Bitsavers and dbit. > > There is some information here: >

Re: Slightly Meta: Travel tips for people traveling internationally with vintage equipment

> > > From: Michael Brutman > To: "General Discussion: On-Topic and Off-Topic Posts" > > Subject: Slightly Meta: Travel tips for people traveling > internationally with vintage equipment? > Message-ID: >

Joe Rigdon

I see that Joe Rigdon's old WWW pages are still on http://www.classiccmp.org/hp/joespage.htm, but the email address doesn't work. The RICM is interested in the ECRM Omnibus boards that he had. Anyone have current contact information? -- Michael Thompson

Re: Importing a PDP-8 from Canada

Thanks to everyone who offered advice and recommendations about re-importing equipment to the US from Canada. What follows is our experience and does not represent advice or recommendations from the RICM. We sent an email to DHS asking about the re-importing procedure and what paperwork we would

Re: Searching for a Sequent (Ian Finder)

> > From: Ian Finder > Subject: Searching for a Sequent > > Reiterating my yearly wanted post for a Sequent Symmetry of any kind. This > is the first system I ever got root on- I'd love to find one some day. > > If you have any leads, please let me know. > > Thanks, > > -

Re: pdp-8/e restoration update.

> > Date: Fri, 11 Aug 2017 17:22:58 +0100 > From: Rod Smallwood > Subject: pdp-8/e restoration update. > > Hi List > > Well I think I've found why the RX01 is not responding. > > The device address (75) is not getting decoded on the controller because > the

Re: Importing a PDP-8 from Canada

Thanks to everyone for comments and suggestions. It sounds like our normal accession paperwork would work for a bill of sale and would show the devices as a donation with no value. Getting the accession paperwork notarized in Canada might make it look more official. On Mon, Jul 31, 2017 at 8:15

Importing a PDP-8 from Canada

The RICM has an opportunity to get a PDP-8/M (built in Maynard, MA) that is in Canada. I remember that there was a discussion on the procedure here, but I can't find it with Google. Can you either point me to the discussion, or tell me what the procedure is? -- Michael Thompson

Re: tape baking (Rob Jarratt)

> > Date: Fri, 7 Jul 2017 21:19:03 +0100 > From: "Rob Jarratt" > Subject: RE: tape baking > > > I long to hear again the sound of the line printer that was attached to > the > > DECSYSTEM-20 I used to use. I think it was a drum printer but I don't > know > the > >

Motorola SDA7 Dual Transistor

I am trying to LTSpice simulate a DEC H-724 power supply from a PDP-12. It includes a Motorola SDA7 dual transistor. I can find any information on this part. Anyone have any info? -- Michael Thompson

RICM Data General Rescue

Dan and I did a rescue run yesterday and came back with four Data General systems; a Nova/3, a Nova/4, an Eclipse S/20, an Eclipse MV/4000, and a large assortment of test equipment and spares. All of the systems are in very nice condition. The Eclipse S/20 is mounted in a cabinet with a model 6125

Re: Oscilloscope Recommendation

We have lots of dual-trace Hitachi 25MHz analog 'scopes that were donated by BMI. They are fine for the low speed work that typically do, and don't have some of the interesting problems that digital 'scopes have. We can get a deep discount on any of the 'scopes that BMI has:

Re: Oscilloscope Recommendation

Great idea about looking for a non-profit discount. That might not work for the Chinese 'scopes, but it could make the US 'scopes prices more competitive. On Sat, Apr 29, 2017 at 11:53 PM, Paul Anderson wrote: > I've almost always used TEK scopes, and liked them. What ever

Re: Oscilloscope Recommendation

Thanks for the recommendation Sent from my iPhone > On Apr 29, 2017, at 4:30 PM, allison wrote: > >> On 04/29/2017 01:28 PM, Michael Thompson via cctech wrote: >> The RICM just received $1,000 to buy a new oscilloscope. I would like a >> four channel. and color

Oscilloscope Recommendation

The RICM just received $1,000 to buy a new oscilloscope. I would like a four channel. and color would also be nice. The bandwidth doesn't need to be high because we usually work on ancient equipment. What would you suggest? -- Michael Thompson

Re: LINCtape/DECtape Head Alignment

> > Date: Sat, 18 Mar 2017 21:46:21 -0500 > From: Jay Jaeger > Subject: Re: LINCtape/DECtape Head Alignment > > Curious: How are you measuring the signal from the head? Do you have > an honest to gosh differential probe, or are you using some other > technique? (If you have