test-drb October 2002

test-drb@ccmp.vtda.org

261 participants
654 discussions

by dwightk.elvey＠amd.com

Hi I wish he'd shown a closeup of the left side. What he did closeup was just a static ram. The good stuff was on the left. I know little about Apple stuff though. Dwight >From: "Sellam Ismail" <foo(a)siconic.com> > >Can anyone identify the Apple ][ card in this eBay auction? > >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2061361635 > >Sellam Ismail Vintage Computer Festival >------------------------------------------------------------------------------ >International Man of Intrigue and Danger http://www.vintage.org > > * Old computing resources for business and academia at www.VintageTech.com * > >

22 years, 2 months

Vintage Scopes

by mhscc＠canada.com

In the August 1968 issue of the "Tektronix Service Scope" there is an article comparing the 512 to the new 323 (the first 'scope manufactured by Sony/Tektronix), and although the article doesn't specifically say so, it does sound like the 512 was the first Tek scope, introduced in May 1949. In another issue an article on power supply troubleshooting does state (in bold print at that) that power transformers are warranted for the life of the instrument (mind you, I guess if the transformer goes, the instrument's pretty dead :). I'll gladly photocopy the relevant page if anybody wants to try to get a free replacement :). Also, further to Toth & Tony's discussion, according to Tek the most common problem when the fuse blows immediately is a shorted diode in the bridge. mike ------------Original Message------------ Message: 43 Date: Fri, 11 Oct 2002 16:39:23 -0700 (PDT) From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com> To: cctalk(a)classiccmp.org Subject: Re: Vintage Scopes Reply-To: cctalk(a)classiccmp.org On Fri, 11 Oct 2002, Philip Pemberton wrote: > Fred Cisin (XenoSoft) wrote: > > Did Tek have any models before the 512? > Not sure. I think my Tek 466 dates back to about 1980. > Later. In 1972? I got a military surplus Tektronix scope. I think that the model number was 512.

22 years, 2 months

What is this?

by cb＠mythtech.net

I thought the Transporter card was an Apple II NIC. But in looking at those pics, I don't see anyway to connect cables. I've never personally seen or used one, so I don't know what kind of cable was used, or where on the card you would look (or if it was even ON the card... might have been a 2nd card that contained the interface for all I know). There is a little bit of info in Google that seems to support my memory of it being a NIC... but nothing that helps explain how to connect it (does seem to indicate that it was a custom network of some sort) -chris <http://www.mythtech.net>

22 years, 2 months

What is this?

by foo＠siconic.com

Can anyone identify the Apple ][ card in this eBay auction? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2061361635 Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 2 months

[OT] paper on Retro ?

by glenslick＠hotmail.com

While we're on the subject, did anyone see the article "Data Extinction" in the October 2002 issue of Technology Review? Doesn't look like the full article is available for free online. http://www.technologyreview.com/articles/tristram1002.asp -Glen _________________________________________________________________ Get a speedy connection with MSN Broadband. Join now! http://resourcecenter.msn.com/access/plans/freeactivation.asp

22 years, 2 months

What is this?

by cb＠mythtech.net

>> But in looking at those pics, I don't see anyway to connect cables. > >Connector at top left, visible in the lower picture on the web page. Ahh... gotcha, I thought that was a boxy red LED. I didn't look close enough. -chris <http://www.mythtech.net>

22 years, 2 months

OT: Clean steel?

by pete＠dunnington.u-net.com

On Oct 17, 8:50, Sellam Ismail wrote: > A while back we had a brief discussion about "clean steel". "Clean steel" > is supposedly steel that was smelted before the first atomic bomb tests, > and therefore contains no radiation. Not "none", just "less". There's always been some background radiation >from natural sources, and some of that finds its way into smelted metals (all sorts, not just steel). > Apparently, air since the first > atomic bomb test is now filled with background radiation, and because so > much air is used in the smelting process, a lot of the radiation gets into > modern steel making it unsuitable for some applications (such as medical > test equipment where radioactive isotopes are used as part of the > operation). And other places where it's important to measure very small amounts of radiation accurately. > So what gives? Is there a government website somewhere that defines > "clean steel"? > > I'm hoping that the steel is actually worth enough to make it a wash to > have it removed. As it stands, the quote I have so far is that we have > $25/ton worth of steel and $30/ton to salvage it. I wouldn't get your hopes up. I know that some of the WW1 German Fleet scuttled in Scapa Flow has been cut up to obtain clean steel -- I've been there and seen the remains -- and I found a reference in the sci.military.naval FAQ to the salvage of German U-boats, but as far as I know, most of that sort of steel is/was wanted for large objects like some of the devices used in research labs like CERN. I found another reference about Fermilab seeking radiologically clean steel some time ago, but not much else. The FAQ points out that the U-boat salvage rights haven't been exercised (and Scapa Flow hasn't been emptied either) so perhaps the demand is too small. The steel can't be resmelted, and possibly not welded either, so if it's to be used, I guess it would have to be of suitable size/thickness to be mechanically cut and formed. Oh, and don't cut it with a torch if you want to sell it as "clean"! -- Pete Peter Turnbull Network Manager University of York

22 years, 2 months

OT: HP 1707B info needed (was: Vintage Scopes)

by Robert_Feldman＠jdedwards.com

Last time I was at my Toyota dealer, their parts lists were on microfiche, so there are other sources you can try besides libraries. -----Original Message----- From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] Sent: Thursday, October 17, 2002 12:32 PM To: cctalk(a)classiccmp.org Subject: Re: OT: HP 1707B info needed (was: Vintage Scopes) <snip> > Also, while looking for the aforementioned info., I located microfiche > for a 1707A service manual (but have no microfiche reader yet), and Some public libraries still have microfiche readers, and it would probably be possible to get permission to look at your own fiche if you needed to. I'm lucky, I managed to get an old microfiche reader that was being thrown out.... -tony

22 years, 2 months

OT: RE: Clean steel?

by dwightk.elvey＠amd.com

Hi I've not heard the term used with steel but it is used with lead. Pre-bomb lead is always needed. I doubt there is much need for pre-bomb steel. Dwight >From: "Feldman, Robert" <Robert_Feldman(a)jdedwards.com> > >Googling doesn't turn up many hits, but I found two (both related to ships): > >www.liddiard.demon.co.uk/photoix/brittany/kleber.htm and >www.hazegray.org/faq/smn7.htm > >Given so few hits, maybe is is an urban legend. Then again, some >applications might require steel without the slight radiation that >blast-furnace smelting might add. The mixing in of contaminated scrap is a >different (and very real) issue from air-blast introduced low-level >radioactivity. > >Bob > >-----Original Message----- >From: Kapteyn, Rob [mailto:kapteynr@cboe.com] >Sent: Thursday, October 17, 2002 12:09 PM >To: 'cctalk(a)classiccmp.org' >Subject: RE: Clean steel? > > >My understanding of this: > >"Unclean" steel is not radioactive because of the A-bomb tests (although we >are all being exposed to roughly 3 times "natural" background radiation >because of those tests. > >There have been several very expensive mistakes in which highly radioactive >contaminants got mixed in with scrap metal going to smelters. Some of >these were not detected until toys and table legs made from the scrap were >being shipped to consumers. > >About 40% of our steel comes from recycled scrap. >This scrap always seems to pick up some radioactive contamination. >The 60% of steel made from virgin ore is "clean". >Your 1930's scrap is still scrap -- not virgin ore. > >The EPA has a new program to address this problem: >http://www.epa.gov/radiation/cleanmetals/ > >-Rob > >-----Original Message----- >From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]On >Behalf Of Sellam Ismail >Sent: Thursday, October 17, 2002 10:51 AM >To: Classic Computers Mailing List >Subject: OT: Clean steel? > > > >There are two rooms in the ACCRC building that are filled with huge old >(useless) refrigeration systems. Tons of steel. We'd like to get the >rooms cleared out so we can use them. > >We've gotten quotes in the past but all of them will end up costing us to >remove the equipment since the rooms are enclosed and one of them is down >a ladder with a narrow door. Everything will need to be cut up and >removed piece-meal. There is also some very large equipment on the roof >that will need a crane to remove. > >A while back we had a brief discussion about "clean steel". "Clean steel" >is supposedly steel that was smelted before the first atomic bomb tests, >and therefore contains no radiation. Apparently, air since the first >atomic bomb test is now filled with background radiation, and because so >much air is used in the smelting process, a lot of the radiation gets into >modern steel making it unsuitable for some applications (such as medical >test equipment where radioactive isotopes are used as part of the >operation). > >I was thinking that because this building is so old (from the 1930s) that >a lot of the steel in those rooms is "clean". > >I called a scrapper yesterday who has been in the business for 30+ years >and is a Harvard graduate, and he said he has never, ever heard of "clean >steel". > >So what gives? Is there a government website somewhere that defines >"clean steel"? > >I'm hoping that the steel is actually worth enough to make it a wash to >have it removed. As it stands, the quote I have so far is that we have >$25/ton worth of steel and $30/ton to salvage it. > >Sellam Ismail Vintage Computer >Festival >---------------------------------------------------------------------------- >-- >International Man of Intrigue and Danger >http://www.vintage.org > > * Old computing resources for business and academia at www.VintageTech.com >* >

22 years, 2 months

Clean steel?

by kapteynr＠cboe.com

My understanding of this: "Unclean" steel is not radioactive because of the A-bomb tests (although we are all being exposed to roughly 3 times "natural" background radiation because of those tests. There have been several very expensive mistakes in which highly radioactive contaminants got mixed in with scrap metal going to smelters. Some of these were not detected until toys and table legs made from the scrap were being shipped to consumers. About 40% of our steel comes from recycled scrap. This scrap always seems to pick up some radioactive contamination. The 60% of steel made from virgin ore is "clean". Your 1930's scrap is still scrap -- not virgin ore. The EPA has a new program to address this problem: http://www.epa.gov/radiation/cleanmetals/ -Rob -----Original Message----- From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]On Behalf Of Sellam Ismail Sent: Thursday, October 17, 2002 10:51 AM To: Classic Computers Mailing List Subject: OT: Clean steel? There are two rooms in the ACCRC building that are filled with huge old (useless) refrigeration systems. Tons of steel. We'd like to get the rooms cleared out so we can use them. We've gotten quotes in the past but all of them will end up costing us to remove the equipment since the rooms are enclosed and one of them is down a ladder with a narrow door. Everything will need to be cut up and removed piece-meal. There is also some very large equipment on the roof that will need a crane to remove. A while back we had a brief discussion about "clean steel". "Clean steel" is supposedly steel that was smelted before the first atomic bomb tests, and therefore contains no radiation. Apparently, air since the first atomic bomb test is now filled with background radiation, and because so much air is used in the smelting process, a lot of the radiation gets into modern steel making it unsuitable for some applications (such as medical test equipment where radioactive isotopes are used as part of the operation). I was thinking that because this building is so old (from the 1930s) that a lot of the steel in those rooms is "clean". I called a scrapper yesterday who has been in the business for 30+ years and is a Harvard graduate, and he said he has never, ever heard of "clean steel". So what gives? Is there a government website somewhere that defines "clean steel"? I'm hoping that the steel is actually worth enough to make it a wash to have it removed. As it stands, the quote I have so far is that we have $25/ton worth of steel and $30/ton to salvage it. Sellam Ismail Vintage Computer Festival ---------------------------------------------------------------------------- -- International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 2 months

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test-drb October 2002