June 2016 - vcf-midatlantic

Re: [vcf-midatlantic] Update - museum internet access
by VAXman＠tmesis.org 30 Jun '16

30 Jun '16

Dave McGuire via vcf-midatlantic writes: >On 06/30/2016 03:38 PM, Joseph Oprysko via vcf-midatlantic wrote: > But >I thought SneakerNet was the primary network protocol when the machines >> were in their prime. > > Good heavens no. Even PDP-8s had DECnet over serial lines. DDCMP!

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IBM MLR3-25GB tape cartridges available
by Mike Loewen 30 Jun '16

30 Jun '16

A friend of mine has 9 NIB IBM MLR3-25GB (SLR50) data cartridges. They're labeled "Servo Written", "Compatible: QIC5210 DC, MLR3 SLR50 Drives)". I don't know what he wants for them, but it wouldn't be much. If you need any, let me know and I'll put you in touch with him. Mike Loewen mloewen(a)cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/

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Anniversary of transistor day
by Jeffrey Brace 30 Jun '16

30 Jun '16

Was at InfoAge today and Fred mentioned this and said the transistor was developed at Camp Evans first (in secret). He mentioned a book: Crystal Fire Birth of the Information Age Book - p. 162, 201. - Jeff Brace

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Update - museum internet access
by Evan Koblentz 30 Jun '16

30 Jun '16

We ordered a modem/router gadget from a company called Mobile Citizen. They sell low-priced wireless Internet access exclusively to non-profits. We got a desktop version (still has wifi built in), not the mobile hotspot described on their web site. This means we don't have to rely on InfoAge for Internet access in the museum. Also, it is a very good deal: you buy the modem and then only pay ten bucks a month for service. The hardware arrived recently and we will install it soon.

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Capacitor list for Mac 128/512/plus Analog board (US Version)
by Matt Patoray 30 Jun '16

30 Jun '16

I thought this might be of help to some trying to do a bulk replacement of capacitors on the Analog boards form the early macs. Where possible i went with 105 degree rated capacitors and with a 25% higher voltage rating. The part numbers are from Mouser. -- Matt Patoray KD8AMG

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Re: [vcf-midatlantic] Need a couple AUI cables - building 10base-5 LAN
by VAXman＠tmesis.org 30 Jun '16

30 Jun '16

Jim Scheef via vcf-midatlantic writes: >Brian, As I'm sure you are aware, brand new Belden 9880 (genuine >etherhose) is available if not exactly cheap. Nevertheless, I'm willing >to donate 100 feet of the stuff to make the museum project work whenever >that might be. Jim I might have some AUI cables here but I'm rather busy with some *paying* me work to go rummaging through the cable cache looking for them.

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PDP 11/40 finally got it working better-er
by william degnan 29 Jun '16

29 Jun '16

For many years I have been working off and on to get my pdp 11/40 running. I was having trouble getting past "chase the lights" and simple tests. I was even able to load in a papertape. It was in memory ok but never ran .I got a lot of good advice but nothing seemed to work. I made sure everything was correct on the backplane and RAM was ok. Some important diagnostics simply would not run however. I was stuck. After a lot of spinning my wheels finally I discovered the CPU was wired for a KJ11 module (stack limit register) but I did not have one installed. I was having problems with code that included the stack so there you go makes sense now....but it took a while. Part of the problem is that I always thought the KJ11 and KW11-L (line time clock) were always paired up. This was not a logical reasoning, it was only because I always saw them paired that way and I assumed they were a set. I even had in the past tested the system with both installed but it froze things so I abandoned, never thought to try just one or the other alone. But apparently that would have been the ticket, my system CPU was wired for the KJ11 only. I tried just the M7237 and poing it worked. I finally was able to run complex diagnostics and I even downloaded BASIC from papertape and ran it (much faster than 11/05 btw) Here is the page with more info http://vintagecomputer.net/browse_thread.cfm?id=635 Next I can try to boot an RT11 RL02 pack from an RL11 controller (M7762). If anyone is going through the same thing how to troubleshoot a lot of the UNIBUS stuff let me know happy to try to help. Bill -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

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Museum Report 6/29/16
by Jeffrey Brace 29 Jun '16

29 Jun '16

Gave a tour to campers age 6-11 today. Two groups of 10 each. It was a quick 10 minute tour because their time was limited. They were seeing all the museums. Later I gave general tours to about 20 people. Most were interested and loved everything there. I finally managed uninterrupted time to getting the Commodore 64 robotics kit working. Also took the Univac parts to the warehouse.

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Re: [vcf-midatlantic] Need a couple AUI cables - building 10base-5 LAN
by Steven Michelsen 29 Jun '16

29 Jun '16

Jim, I believe I have a sack full of that stuff somewhere. I am unable to look for it until Sunday. If you don't hear from me by Tuesday or so write me direct at stevenm(a)optonline.net Steve Sent on the new Sprint Network from my Samsung Galaxy S®4 -------- Original message -------- From: Duane via vcf-midatlantic <vcf-midatlantic(a)lists.vintagecomputerfederation.org> Date: 06/29/2016 1:52 PM (GMT-07:00) To: vcf-midatlantic <vcf-midatlantic(a)lists.vintagecomputerfederation.org> Cc: Duane <DBC1964(a)cox.net> Subject: Re: [vcf-midatlantic] Need a couple AUI cables - building 10base-5 LAN -----Original Message----- From: Jim Scheef via vcf-midatlantic Sent: Wednesday, June 29, 2016 4:30 PM To: 'vcf-midatlantic' Cc: Jim Scheef Subject: [vcf-midatlantic] Need a couple AUI cables - building 10base-5 LAN Hello all, Please forgive my infrequent lurking. For those who do not know me (most of you) I'm the guy who helps Kelly in the consignment room at VCF-E each year. I've decided to build a 10base-5 LAN segment in my basement. Right now I'm in the collecting the parts stage and need 2 or 3 AUI cables no more than 2 meters long. They must have that arcane DB-15 connector with the sliding clip. I also need two N-connector terminators (50 ohm, of course). So far I have a three short lengths of real ether hose with N-connectors and three Cabletron ST-500 transceivers (2 more would be nice). Unfortunately these have a BNC connector where the vampire tap should be, so I'm working on that. In the meantime, some short, good AUI cables would be a big boost. I will be happy to pay reasonable price plus shipping. Anyone? Longer term, would it not be cool if our museum had a working 10base-5 LAN hanging from the rafters providing connectivity between the Vaxen, PDPs and other period machines? Maybe even to the inter-tubes! Thanks, Jim

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Need a couple AUI cables - building 10base-5 LAN
by Jim Scheef 29 Jun '16

29 Jun '16

Hello all, Please forgive my infrequent lurking. For those who do not know me (most of you) I'm the guy who helps Kelly in the consignment room at VCF-E each year. I've decided to build a 10base-5 LAN segment in my basement. Right now I'm in the collecting the parts stage and need 2 or 3 AUI cables no more than 2 meters long. They must have that arcane DB-15 connector with the sliding clip. I also need two N-connector terminators (50 ohm, of course). So far I have a three short lengths of real ether hose with N-connectors and three Cabletron ST-500 transceivers (2 more would be nice). Unfortunately these have a BNC connector where the vampire tap should be, so I'm working on that. In the meantime, some short, good AUI cables would be a big boost. I will be happy to pay reasonable price plus shipping. Anyone? Longer term, would it not be cool if our museum had a working 10base-5 LAN hanging from the rafters providing connectivity between the Vaxen, PDPs and other period machines? Maybe even to the inter-tubes! Thanks, Jim

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