July 2017 - vcf-midatlantic

IGNORE test
by Duane Craps 14 Jul '17

14 Jul '17

test

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Scrap dealer finds Apollo-era NASA computers in dead engineer’s basement in PA
by Christian Liendo 14 Jul '17

14 Jul '17

I get someone in the Pittsburgh area might want to know about this. https://arstechnica.com/science/2017/07/nasa-computer-engineer-basement/

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OT: Sussex County ARC Hamfest This Sunday July 16th
by Kelly Leavitt 14 Jul '17

14 Jul '17

Kind of OT, but usually there is some vintage stuff to be found... The Annual Sussex County Hamfest will be Sunday July 16, 2017 We still get several hundred tailgaters and about a thousand buyers. As usual, I'll be working the food concession. Gates open at 6:00am for sellers/tailgaters 8:00am for buyers 270,000 square feet (Six Plus Acres!) of outdoor tailgate space and 10,000 square feet of indoor space. Food, Door Prizes and Ample Parking too! Held at the Sussex County Fair Grounds, 37 Plains Road Augusta, NJ 07822 Confirmed indoor vendors * KJI Electronics * Quicksilver Radio * Satellite Sam * Manual Man * Plum Dx Supplies * The Wooden Ham For more information email us at Hamfest(a)scarcnj.org<mailto:hamfest@scarcnj.org?subject=2017%20Hamfest> or call us at 973-862-8197 Thank You for supporting our Hamfest Sussex County ARC Hamfest Committee For more information our webpage is http://www.scarcnj.org/hamfest.html Email Hamfest(a)scarcnj.org<mailto:Hamfest@scarcnj.org?subject=July%20Hamfest> Phone 973-862-8197 See you on July 16th 73 the Sussex County ARC Hamfest Committee [http://www.scarcnj.org/images/arrl-logo.gif] ARRL Approved Hamfest <mailto:Hamfest@scarcnj.org?subject=July%20Hamfest>

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OT: Wi-fi range extender
by Jeffrey Brace 14 Jul '17

14 Jul '17

I'm in need of a wifi range extender for a Verizon FIOS router. Does anyone have one for free or near free that they no longer need? I see one on Amazon for $20. I wonder how easy it is to configure and how reliable it is. -- ======================================================== Jeff Brace ========================================================

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Museum Report 2017-07-12 July 12, 2017
by Jeffrey Brace 12 Jul '17

12 Jul '17

Three retired people visited the museum today. Two of them were from Atlanta and one was local. The gentleman had been in the computer business for a number of years before retiring. He first worked for a company, then started his own company by offering PC support. He told about how things changed over the years in terms of support. His first home computer was a TRS-80. They really liked the exhibits. I told them about the VCF South East and the local lady about VCF East, the train show and the Base of Terror. I also tested some of the C64 SIDs. I think that the docents will be pleased with my selections :-D -- ======================================================== Jeff Brace ========================================================

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Re: [vcf-midatlantic] Off topic-testing 3 phase power
by Jason Perkins 11 Jul '17

11 Jul '17

Any good multimeter should be fine for this. You could measure phase to phase voltage, and check frequency. I have a mid range Fluke meter which could do this test easily (I recall it can measure 1000v) -J On Mon, Jul 10, 2017 at 2:01 PM, Ben Greenfield via vcf-midatlantic < vcf-midatlantic(a)lists.vintagecomputerfederation.org> wrote: > > > ---------- Forwarded message ---------- > From: Ben Greenfield <ben(a)cogs.com> > To: vcf-midatlantic <vcf-midatlantic(a)lists.vintagecomputerfederation.org> > Cc: Herb Johnson <hjohnson(a)retrotechnology.info> > Bcc: > Date: Mon, 10 Jul 2017 14:01:01 -0400 > Subject: Re: [vcf-midatlantic] Off topic-testing 3 phase power > Hey Herb, > > The only thing I can say in my defense is that one can be both naive and > have respect for electricity. > As for a professional, I have one involved. Unfortunately my natural > curiorsity keeps me from being passive during integration of this project. > > I could have gotten into all sorts of esoteric details about what I’m > really trying to troubleshoot but I really wanted a simple answer, which I > got from Bill Dudley. Bill’s answer was simple and re-enforced my beliefs > on the subject. > > Regarding testing equipment. I believe the Fluke I referenced was proper > testing equipment and I wanted to see what others thought. I included a > link to it’s page it is rugged 4 channel 100 Mhz portable oscilloscope. > This looks like the ultimate tool for this type of work and I wanted to > know what other’s thought. > > http://en-us.fluke.com/products/portable-oscilloscopes/fluke-190-ii- > portable-oscilloscope-190-104.html > > I followed list guidelines by marking the post off-topic. I felt it was a > fair question in a hacker environment and I thought others may have first > hand experience they could share. > > I was satisfied with answers I did receive and I love that the list exists > as resource for hacking questions for all sorts of technology. > > Thanks, > > Ben > > > On Jul 10, 2017, at 12:45 PM, Herb Johnson via vcf-midatlantic < > vcf-midatlantic(a)lists.vintagecomputerfederation.org> wrote: > > > > Ben Greenfield has asked about testing a 50Hz 400 volt 16 amp outlet. > > > > Without going on about it: something in Ben's request, doesn't feel > "right". This is a dangerous circuit. I don't give public advice about > things that put people at risk. > > > > Ben, consult with a local qualified electrician, about whatever you have > in mind. If such circuits are unfamiliar to you, if you don't have > appropriate LINE TESTING test equipment - get someone who IS familiar and > local and qualified. > > > > Herb Johnson > > > > -- > > Herbert R. Johnson, New Jersey in the USA > > http://www.retrotechnology.com OR .net > > > -- Jason Perkins 313 355 0085

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Re: Digest, Vol 21, Issue 10 3 Phase Testing Power
by SVCatITC＠aol.com 11 Jul '17

11 Jul '17

Hi Ben; I'll put in my $0.02. Having been an industrial electrician for a couple of years back in the 1970's I might know a thing or two. I worked in a wire drawing mill where 208 Y and 480 Y 3 phase were common voltages we worked with every day. If you want to discuss more info on the project you are working on, feel free to contact me off list. My only caution is to insure safe signal return commons to the power lines you are working on, along with proper insulation of your phase line current transformers. Depending on how the power is brought into your facility, and how old the facility is, the grounds can be VERY ratty!!! Although I am not trying to volunteer him, Bill Dromgoole may be another resource to contact as he just made up a breadboard to load up the 3 phase 400 cyle MG set for the Univac targeting computer. That shipboard power was part of his "bread & butter" when he was working. Bill Inderrieden In a message dated 7/11/2017 12:02:05 P.M. Eastern Daylight Time, vcf-midatlantic-request(a)lists.vintagecomputerfederation.org writes: Message: 2 Date: Mon, 10 Jul 2017 14:01:01 -0400 From: Ben Greenfield <ben(a)cogs.com> To: vcf-midatlantic <vcf-midatlantic(a)lists.vintagecomputerfederation.org> Cc: Herb Johnson <hjohnson(a)retrotechnology.info> Subject: Re: [vcf-midatlantic] Off topic-testing 3 phase power Message-ID: <850FDE4F-74C2-471D-A3C4-BF8A74D9C38E(a)cogs.com> Content-Type: text/plain; charset=utf-8 Hey Herb, The only thing I can say in my defense is that one can be both naive and have respect for electricity. As for a professional, I have one involved. Unfortunately my natural curiorsity keeps me from being passive during integration of this project. I could have gotten into all sorts of esoteric details about what I?m really trying to troubleshoot but I really wanted a simple answer, which I got from Bill Dudley. Bill?s answer was simple and re-enforced my beliefs on the subject. Regarding testing equipment. I believe the Fluke I referenced was proper testing equipment and I wanted to see what others thought. I included a link to it?s page it is rugged 4 channel 100 Mhz portable oscilloscope. This looks like the ultimate tool for this type of work and I wanted to know what other?s thought. http://en-us.fluke.com/products/portable-oscilloscopes/fluke-190-ii-portable -oscilloscope-190-104.html I followed list guidelines by marking the post off-topic. I felt it was a fair question in a hacker environment and I thought others may have first hand experience they could share. I was satisfied with answers I did receive and I love that the list exists as resource for hacking questions for all sorts of technology. Thanks, Ben

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Reproduction OSI 502 Boards Are In!
by systems_glitch 11 Jul '17

11 Jul '17

The first batch of reproduction OSI 502 boards are in and look fine! If you preodered you should have an email from me. If you missed the preorder and you'd like to buy one, I've got plenty -- they're $25 USD each. Thanks, Jonathan

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Festivus 2017 mark your calendars
by Jeffrey Brace 10 Jul '17

10 Jul '17

The date is December 9 & 10. -- ======================================================== Jeff Brace ========================================================

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Off topic-testing 3 phase power
by Herb Johnson 10 Jul '17

10 Jul '17

Ben Greenfield has asked about testing a 50Hz 400 volt 16 amp outlet. Without going on about it: something in Ben's request, doesn't feel "right". This is a dangerous circuit. I don't give public advice about things that put people at risk. Ben, consult with a local qualified electrician, about whatever you have in mind. If such circuits are unfamiliar to you, if you don't have appropriate LINE TESTING test equipment - get someone who IS familiar and local and qualified. Herb Johnson -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net

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