test-drb May 2007

test-drb@ccmp.vtda.org

235 participants
483 discussions

by classiccmp＠vintage-computer.com

I pulled out my "extra" Apple /// for a test run today in preparation for selling it. It worked great but after a bit the power supply started smoking. I pulled it to find that a cap has blown and shot oil all over the place. Rather than repair it I'm looking to replace it with another. Does anyone have an Apple /// power supply they'd part with? -- Erik Klein www.vintage-computer.com www.vintage-computer.com/vcforum The Vintage Computer Forums

17 years, 1 month

Sun, HP "scrap" (???)

by chrism3667＠yahoo.com

--- William Donzelli <wdonzelli at gmail.com> wrote: > > I don't think it's even near that. I *guess* that > it's in the gram > > range at best... > > Can someone please explain to me why the classic > computer commuity > simply can not grasp the concept that there is a lot > of gold in older > computer hardware? Really, guys, I do not know how > many times you have > been told, yet it just does not sink in... I'll venture a guess and say the vast majority of people on this list are interested in the collectible/nostalgic aspects of old hardware, not for recycling. How much old *scrap* is there left these days? > The guy is shooting high, but not very high. $5.00 a > pound for really > good boards is not insane. Just how much gold (after considering the costs of extraction) in monetary terms would a $5 pound of scrap yield? I don't see any figures to that effect. ____________________________________________________________________________________Pinpoint customers who are looking for what you sell. http://searchmarketing.yahoo.com/

17 years, 1 month

Semi-OT: Need help identifying diode specs

by pat＠computer-refuge.org

I picked up a few spare diodes from my local surplus place, and I need some help identifying them.. They're about 3-3/4" long and 1-1/4" wide at the (hex) mounting base, have a threaded negative terminal, and an approx 1/2" diameter positive terminal on the top. They appear to have a Westinghouse (underlined W in a circle) logo on them, next to a diode symbol marking polarity. Next to that is the number "18840100" (part number?) and "8206" (date code?). Any idea what voltage and amperage this diode should be rated for? I tried googling for info, but only found a few places that wanted to sell me one (with at best the info that it's a "semiconductor diode".. gee, thanks). One site also listed the part number "5961-01-198-6175" as an equivalent. Thanks much, Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

17 years, 1 month

Bringing the VAX 4000-300 back to life.

by RodSmallwood＠mail.ediconsulting.co.uk

Firstly a big thanks (THANKS) to all those who responded to the power plug question. I bought the VAX 4000-300 system on UK Ebay and did the 250 mile trip to Cambridge to collect it early on Saturday. These things are not that big but weigh a ton!! The guy selling it was lot larger than I (thank heavans!) I did not know the suspension in may car went that low! There it sat until Tuesday evening when my son (6'4" & 210pounds) who's a trained weight lifter helped me ge it out of the car and onto its wheels. It need a good clean inside and out but otherwise is undamaged and complete. I extended the notch in the power cable I had and fired it up. First level diagnostics OK Choose a language OK Boot er no but as it seems as the system spent some or all of its life in the insurance industry I'm not surprised the disks have been wiped. Ok so next move. I'm going to try and make a VMS 6.2 bootable tape on the -200 as the -300 has a TK70. The -300 also has a KZQSA (SCSI) controller and whilst they are no good with hard drives I think they work with CD ROM's I also have a stand alone SCSI CD drive (Yamaha CRW4416SX) it has the really small SCSI plugs (inch and a bit long) on the back and the KZQSA has the really big ones. Comments on which is best way to proceed welcomed. Rod Smallwood

17 years, 1 month

Apple /// Power Supply

by roger.holmes＠microspot.co.uk

> Date: Tue, 29 May 2007 03:03:17 +0100 > From: "Ensor" <classiccmp at memory-alpha.org.uk> > Subject: Re: Apple /// Power Supply > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <006601c7a19c$a7e855e0$0a01a8c0 at memoryalpha.org.uk> > Content-Type: text/plain; format=flowed; charset="Windows-1252"; > reply-type=original > > Hi, > >> _If_ that PSU was easily available, I could agree with this. But >> it isn't. It's likely to take considerable time and effort to track >> one down, I think.... > > I don't know what the situation is in the US, but here in the UK > I've come > across exactly *ONE* Apple /// in some 22 years of collecting.... > > I'd put his chances of sourcing a working replacement PSU these > days at > ZERO. > > > TTFN - Pete. Actually I have a spare PSU, here in the UK, but sorry I'm keeping it for my own Apple ///s. These machines were so tightly engineered as regards FCC requirements that there always seemed to be a problem with getting the heat out and stopping the electronics shorting out against the case. Particularly the RAM daughter board at full capacity. The real time clock is a bit of a nightmare to get adjusted properly too. I don't mean to within spec, I mean to run so I don't have to adjust it every week, which is what I had to do with them when they were brand new. By contrast the 5MB or 10MB Profile hard drive sits in a box about five times bigger than is needed. It was a real luxury after doing the floppy shuffle for three quarters of an hour compiling Pascal programs, though upgrading to three floppy drives saved most of the arm work. Are logic diagrams available for the Apple /// now? If I remember right, even as dealers/service providers and hardware/software developers we were not allowed logic diagrams for the A///. That's where the rot started and we officially had to do module replacement, though we still replaced IC's when they had blown craters in the top of them, and were still able to buy AC power switches and such like >from Apple. Must drag them out from my brother's loft some time and see if either of them still work. Hope they're OK, they are stored above the cold water tank in their original boxes. Fortunately the loft is heated so should be OK. Roger Holmes.

17 years, 1 month

Anyone for a RELLY expensive 11/780 (UK)??!!

by james＠machineroom.info

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=180125971585&fromMakeT… Optimistic is an under statement :-)

17 years, 1 month

Burroughs ICON

by devonstopps＠gmail.com

Someone on the list has (had?) a few. I can't remember who, check the archives. Devon >Date: Thu, 31 May 2007 15:52:37 -0400 (EDT) >From: bpope at wordstock.com (Bryan Pope) >Subject: Re: Burroughs ICON > >And thusly were the wise words spake by Chris M >> >> Anyone have one? They were popular in Canada (maybe >> made there??). I want it. >> > >Ontario to be exact, where I used them in high school. Their OS was >QNX, another Canadian company. :) I have yet to see in available, >though.. :( > >Cheers, > >Bryan

17 years, 1 month

Apple /// Power Supply

by classiccmp＠memory-alpha.org.uk

Hi, >>....Repairing a switching power supply is one the last >>things I would want to do. > > Why? Personally I've never had any luck repairing switch mode PSUs either....obviously there's some hole in my understanding of them.... Actually, I have managed to repair a couple; but that was when I did a City & Guilds course in electronic repair at college (I was bored....) and had a full schematic and circuit description to work with. But going in blind? <shudder> TTFN - Pete.

17 years, 1 month

WDXT-150 utilities?

by doc＠mdrconsult.com

Does anyone have them? I have a WDXT-150 board with a WD93024 drive. I suspect that the drive is dead, as it doesn't do anything, including spinning up, but I'd like to be able to run diags on it if any exist. Doc

17 years, 1 month

Hazeltine 1400 info?

by ajp166＠bellatlantic.net

> >Subject: Re: Hazeltine 1400 info? > From: Richard <legalize at xmission.com> > Date: Thu, 31 May 2007 09:53:15 -0600 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >In article <3629638E-1D52-4A9A-B23C-2639BEE62C5E at neurotica.com>, > Dave McGuire <mcguire at neurotica.com> writes: > >> On May 30, 2007, at 3:20 PM, Richard wrote: >> > I just purchased a Hazeltine 1400 terminal from ebay. This terminal >> > apparently has no lower case, so it seems like quite an oldie. >> >> Cool! I saw that, and would've chased it if I weren't out of >> money at the moment. I sat in front of a 1420, and later a 1500, for >> a long time many years ago. > >It appears to be in good condition too. Do you happen to know what >year this would have been manufactured? Is it one of the Hazeltines >with core display memory that remembers the last thing that was >displayed after you turn it off? NO core, that was the 1000/1100/1200 series. Those were early 1970s as I used a 1200 on BOCES LYRICS TOPS-10 system in '72. The 1400 series was after the 1500 series and was effectively a cost reduced (cheaper to build and sell) terminal. The 1400 was circa 1976-78 or so. Allison >-- >"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download > <http://www.xmission.com/~legalize/book/download/index.html> > > Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 1 month

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test-drb May 2007