- vcf-midatlantic - lists.vcfed.org

Two old CRTs to retire ..
by John Heritage 28 May '20

28 May '20

Hey folks, I have two old CRTs I want to 'get rid of'. Before I figure out how to recycle these properly, I just wanted to see if anyone here wanted them. I can send pics, but they are: Hitachi CT1396VM - Composite input (and passthrough) output only. Has some screen burnin - not visible on brighter screens, but definitely visible on darker screens. A RCA/Thomson Consumer Electronics T09082 small color TV and VCR combo. has Composite and Audio in on the side (+ a "ear" jack), and RF on the back. No burn-in, and the last time I tested the VCR (decade ago) it worked. The outside cases are in good shape for their age .. Let me know if you want pics or want the screens.. John

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TI DS990/1 OS - Request from VCF Italia
by Jeffrey Brace 27 May '20

27 May '20

A member from VCF Italia is looking for an operating system for the Texas Instruments DS990/1 with 8" FD1000 floppy drive. Can anyone tell me where I might be able to find it for him? -- ========================================= Jeff Brace Vice President & Board Member, VCF East Showrunner Vintage Computer Federation http://www.vcfed.org/ jeffrey(a)vcfed.org

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Rediscovering Raymond Scott
by Jeffrey Jonas 26 May '20

26 May '20

Everyone knows Raymond Scott music. It's in our DNA because Carl Stalling wove it into so many cartoons. But Raymond Scott was an electronic music pioneer who worked with Moog and others on analog computers and some digital techniques. Here's a recent 3 hour retrospective about Raymond featuring his son and many key musicians: https://www.facebook.com/asmac.org/videos/3072223136194116/ Here's a free PDF book for download: https://www.raymondscott.net/artifacts/ To hear more, there's "Raymond Scott Radio" on Pandora

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RetroMagazine - New Online Vintage Computer Magazine
by Jeffrey Brace 25 May '20

25 May '20

Just heard about this new online Retro Computer Magazine. At first glance it seems that it has been written in Italian for many months and this is the first English language version. Looks pretty good: https://www.retromagazine.net/download/RetroMagazine_00_eng.pdf -- ========================================= Jeff Brace Vice President & Board Member, VCF East Showrunner Vintage Computer Federation http://www.vcfed.org/ jeffrey(a)vcfed.org <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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FANUC A860-0056-T020 Powering and Industrial Papertape Reader Component Independently
by Bill Degnan 25 May '20

25 May '20

More detail to earlier post. https://www.vintagecomputer.net/FANUC/ Reader Part number A860-0056-T020 http://vintagecomputer.net/FANUC/FANUC%20A20B-0004_pwr-connect1.jpg http://vintagecomputer.net/FANUC/FANUC%20A20B-0004_250WV-AC-cap.jpg Here is the control board on the reader which has 50-pin tape in and punch out ports: http://vintagecomputer.net/FANUC/FANUC%20A20B-0004_IO-board.jpg http://vintagecomputer.net/FANUC/DOSTEK-440a-BTR.jpg The 50pin rainbow cable coming off the punch port is connected to a behind the tape reader (or "BTR"). The BTR converts the signals and sends them to a computer's serial port so they can be captured into a tape image. This is what they made when indudstrial processes converted from using actual tape readers and tapes to saved tape images. The BTR was the gateway between the reader and a computer. This FANUC 6 hardware manual, which includes this model of tape reader as part of a larger system, references the part numbers found on the reader, which is how I learned what I learned about it. http://cncmanual.com/download/1646/ I am working to safely power it up. Not in a rush to fry it.

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Re: [vcf-midatlantic] Paper Tape readers from CNC machines
by W2HX 23 May '20

23 May '20

If it doesnt know which way it wants to start, then it might be an AC motor in need of a starting capacitor. http://www.capacitorguide.com/motor-starting-capacitor/? 73 Eugene W2HX ________________________________ From: vcf-midatlantic <vcf-midatlantic-bounces(a)lists.vcfed.org> on behalf of Jeff G via vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> Sent: Saturday, May 23, 2020 7:28 PM To: VCF Cc: Jeff G Subject: Re: [vcf-midatlantic] Paper Tape readers from CNC machines

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Re: Paper Tape readers from CNC machines
by Jeff G 23 May '20

23 May '20

So update on my end, it seems I got my tape reader (at least the reader itself) mostly working. Turns out it was defective; had 2 bad 4049 ICs; one had dead outputs so only 4 bits were working, the second seemed to be noisy/flaky, so replacing both got me solid data output. So I have solid confirmation of the strobe pins (one inverted) and the data pins. I still don't have solid motor control, I know Duane and others mentioned 24v, but the motor sounds much happier around 15v, yet its flaky in that while it mostly runs fine, the motor seems to not know what direction it wants to go in. On occasion the motor doesn't want to start, and using what I think is a reverse pin only "usually" works. I'm really half tempted to believe this really wants 24 volts AC, but not sure I want to try that just yet.Theres 4 diodes in the motor control section. Theres 2, maybe 3 pins on the IDC plug, and 2 pins on the power connector that seem to be for motor control. One seems to slow it down (although it just stops instead, almost like a "hold", one seems to "usually" reverse the motor, and the last seems to be a step pulse. This all sounds to me like half the waveform it would get from a 24v AC input is missing. I cannot find datasheets for the stepper control ICs anywhere, seems they are Fujitsu MB14275 and MB14276. Anyhow...since it mostly works I can see if I can actually get this thing to read some data! Also if I can verify the motor control wiring, I'll post up a full pinout. BTW This is a Sanyo Denki 2401C-1 tape reader, likely from a Yasnac 2000G CNC controlled somethin rather, likely a Mori lathe. Jeff aka Bags

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Do something useful with your C64
by William Dudley 22 May '20

22 May '20

https://www.crowdsupply.com/amigastyle/zeus-lt CrowdSupply is an interesting platform -- they make and sell all kinds of interesting computers for developers. Bill Dudley This email is free of malware because I run Linux.

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TPUG Toronto PET Users Group on Zoom tonight 7:30PM Eastern
by Jeffrey Brace 21 May '20

21 May '20

The Toronto PET Users Group meets online now for their monthly meeting. They usually meet the third Thursday of the month at 7:30PM. They are using Zoom due to Covid-19, so this is an opportunity for us from far away to join their meeting. Here is the info: ---------- Forwarded message --------- From: Leif Bloomquist <leif(a)schemafactor.com> Date: Wed, May 20, 2020 at 12:36 AM Subject: [torontocbm] Toronto PET Users Group May 21st 2020 *Online* To: torontocbm(a)freelists.org <torontocbm(a)freelists.org> Hi all, We are going to try another online virtual meeting for this month. Thursday May 21st 2020 at 7:30 PM. Open to any topic, though there may be some C64-based music happening. The video link will be posted at this page, as well as Discord and on TorontoCBM soon before the meeting starts. https://www.tpug.ca/2020/05/may-2020-meeting-online/ Of course, Discord chat is always open, see you there! https://discord.gg/V5DHgR3 -- ========================================= Jeff Brace Vice President & Board Member, VCF East Showrunner Vintage Computer Federation http://www.vcfed.org/ jeffrey(a)vcfed.org <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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LINC-EIGHT pictures
by Herb Johnson 20 May '20

20 May '20

Congrats on acquiring the LINC/8 system. I saw it go by on eBay and I thought: who had these machines? I'm sorry to hear it was Charles Lasner, who passed a month ago from CoVid. Two years ago in September, he contacted me and other LINC and DEC owners, about reviving his last version of P?S/8, and reading off his old backups. Whatever tapes and notes remain, I hope you and the subsequent LINC owners can recover. We will not see the likes of people like him again. And we won't see old tech like this again, either, in surprisingly good condition even as it delaminates! Regards, Herb -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT retrotechnology DOT info

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