test-drb

test-drb@ccmp.vtda.org

101090 discussions

Whats happened to the Vintage Computer Forum?

by barythrin＠gmail.com

Sure there isn't a typo in the url? http://www.vintage-computer.com/vcforum/ works fine for me. ------Original Message------ From: Steve Hunt Sender: cctalk-bounces at classiccmp.org To: General Discussion: On-Topic Posts Only ReplyTo: General Discussion: On-Topic and Off-Topic Posts Subject: Whats happened to the Vintage Computer Forum? Sent: Mar 27, 2013 3:55 PM What's happened to the VCF? I'm just getting a place holder page that sells web sites.

13 years

Debugging under RSTS/E

by jhfinedp3k＠compsys.to

I attempted to run an RT-11 program under V10.1 of RSTS/E. Is there any way of invoking ODT or a DEBUG package under RSTS/E which is similar the SDX.SYS in RT-11 or "/DEBUG" in TSX-Plus? I can LINK ODT into the RT-11 program and use ODT that way. But I though that RSTS/E might support something a bit more user friendly than ODT at this point? Jerome Fine

13 years

Whats happened to the Vintage Computer Forum?

by stephen.hunt＠iname.com

What's happened to the VCF? I'm just getting a place holder page that sells web sites.

13 years

classic-computers.org.nz down at the moment

by terry＠webweavers.co.nz

Hi, I know people occasionally access my domain at classic-computers.org.nz for articles and resources. Just a note to say it's down due to the 9GB monthy bandwidth allowance being exceeded. The hosting service seems unresponsive at the moment (in other words, I requested a bandwidth increase two days ago but nothing's happened). Hopefully it will be back up soon, but just letting folk know it could be as late as the 1st April, when the allocation is reset (but hopefully not that long..mind you with Easter coming up...!) Terry (Tez)

13 years

Bristol Bloodhound parts anyone ?

by jdr_use＠bluewin.ch

In a vain attempt to find bits of a Ferranti Argus I uploaded myself with some parts of the iconic cold-war-era Bristol Bloodhound missile. Which I don't really want.... What would be appropriate venues / mailing lists to get rid of those parts ? ( items : radar receiver dish with positioner, accelerometer, gyro, altimeter, bulkhead, but very litte electronics ) Location : Switzerland The chap that sold me the parts uses the Bloodhound's ramjet engine as a coathanger..... Are there any surviving Argus 100 or 200 systems ? Jos

13 years

My Commodore 64 on YouTube

by terry＠webweavers.co.nz

I got around to it eventually. My Commodore 64 on Youtube! http://youtu.be/LfpYaz8FtEY Terry (Tez)

13 years

Wanted: VT101 compatible keyboard.

by tomjoyce＠lavabit.com

Hello all! I have recently added a DEC VT101 to my collection. Only problem is, it came with no keyboard. The way I understand it, any VT10x keyboard will work with it. So, does anyone have an extra that they would be willing to part with? Thanks a lot! -- Tom.

13 years

Science! (With VAXen)

by lproven＠gmail.com

http://www.theregister.co.uk/2013/03/25/geeks_guide_jodrell_bank/ ... with mention of some retrocomputing elements, too... -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884http://www.theregister.co.uk/2013/03/25/geeks_guide_jodrell_bank/

13 years

Fwd: Failure Notice

by woyciesjes＠sbcglobal.net

Mouse --- Is all okay with your servers? -------- Original Message -------- Subject: Failure Notice Date: Fri, 22 Mar 2013 22:00:25 -0000 From: MAILER-DAEMON at yahoo.com To: woyciesjes at sbcglobal.net Sorry, we were unable to deliver your message to the following address. <mouse at rodents-montreal.org>: Mail server for "rodents-montreal.org" unreachable for too long --- Below this line is a copy of the message. Received: from [66.94.237.195] by nm20.access.bullet.mail.mud.yahoo.com with NNFMP; 21 Mar 2013 21:58:23 -0000 Received: from [68.142.198.207] by tm6.access.bullet.mail.mud.yahoo.com with NNFMP; 21 Mar 2013 21:58:23 -0000 Received: from [127.0.0.1] by smtp111.sbc.mail.mud.yahoo.com with NNFMP; 21 Mar 2013 21:58:23 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sbcglobal.net; s=s1024; t=1363903103; bh=0Jsqb4xukiAvB6ZgvReWY1rhyHbsBaeuEZBC9tsQpP4=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=NgGLDupFXpIBY50EvcRYAV7NPtRAeA5NtJLgZHv+5FkgRJLGk9S/UwHtXS0jqMXY+NEuC8nibCDirbtAVPpGbFikgTpiBzzNuUnXI3++A+QCzaqJwhGGCVZx6yaXzk+rSqEQuliCGaSybthKa+GlvdwcAy/1SczPm/CvlIUQOJg= X-Yahoo-Newman-Id: 467025.55886.bm at smtp111.sbc.mail.mud.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: joYMzwUVM1m1e7AXJJRIE4ZEmUlBGBS_0IW3wJOgrSS1PC4 QEOgOvwgzDZIkfTXPLnbkvY3BG5VaOA8thWslul6X7f1Eis4rLb2pRBkybmg O0cSbWBzgD9eWvWz2ySPXZMXledO2B6rawlg7LGPm268r_lSjJ25CTN2Nt45 xVBpBbxnr_.nP.G25mkI99.nUVABzbiiR2zxagPfJUHFPsp5g5JfVGc1oeN1 _FkbnTL3m1FsagNMq2c86ARuFdNIeSrOAI._RwmssLc7c5VxdbuIPzzf1lIH nKaEMdUgG.UClAxIc3xkU0t6OcZT5jDV2xQoKzLd2FdLpYlOqjQ3Uf8bLFo6 zdjReIrad12enCvPEQCIOh7R2T23GtIepFk1IxNiglwXYzeTudawnDa1VIvx hlXglrHOjMGI3QhmjbGW2e5HIUCekeUQbRl3cYY6lyvImV6CXmj.4oWcyzjL YWJyJ5VSyVUurxwmzM3Wa_gNRiyhYHmaYheVCThj4c0e8g2OWlh3relXnxU7 JNa7kioxwbO7p5eV5AI2oSzG9q4VX5o8DGwqZPLV5wbwoqJCcGEgMfXlZ0Xm NFOYte.Wf_.Ffk9nqtXXbk2H3OXBMJ.7FW9O31Ac- X-Yahoo-SMTP: 1vdsNA6swBDwgbjTvnGKq3DnmhPsZKBlBgRRz0jp5jZHz6WjPA-- X-Rocket-Received: from [192.168.1.70] (woyciesjes at 75.37.158.43 with plain) by smtp111.sbc.mail.mud.yahoo.com with SMTP; 21 Mar 2013 14:58:23 -0700 PDT Message-ID: <514B8281.1020802 at sbcglobal.net> Date: Thu, 21 Mar 2013 17:58:25 -0400 From: Dave Woyciesjes <woyciesjes at sbcglobal.net> User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 MIME-Version: 1.0 To: Mouse <mouse at Rodents-Montreal.ORG> Subject: Re: I'm baack... References: <514B4AF6.1070207 at sbcglobal.net> <201303212143.RAA02946 at Sparkle.Rodents-Montreal.ORG> In-Reply-To: <201303212143.RAA02946 at Sparkle.Rodents-Montreal.ORG> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 3/21/2013 5:43 PM, Mouse wrote: >> Well, it's been about a 3 year hiatus from the list for me... >> How many of the old farts & curmudgeons are still around? ;) > Not sure I count, though I have been feeling increasingly curmudgeonly > in recent years. But I'm still here. Good to see. Yeah, I think I recall you being a touch curmudgeonly occasionally. ;) >> One burning question, has the list's definition of a classic computer >> been updated from the 10 year rule? > I don't recall seeing the question discussed either way recently. > That's a surprise. -- --- Dave Woyciesjes --- ICQ# 905818 --- AIM - woyciesjes --- CompTIA A+ Certified IT Tech - http://certification.comptia.org/ --- HDI Certified Support Center Analyst - http://www.ThinkHDI.com/ Registered Linux user number 464583 "...Talking to you is like clapping with one hand." Anthrax, "Caught in a mosh" -- --- Dave Woyciesjes --- ICQ# 905818 --- AIM - woyciesjes --- CompTIA A+ Certified IT Tech - http://certification.comptia.org/ --- HDI Certified Support Center Analyst - http://www.ThinkHDI.com/ Registered Linux user number 464583 "Computers have lots of memory but no imagination." "The problem with troubleshooting is that trouble shoots back." - from some guy on the internet.

13 years

Mid-Atlantic Retro Open House Weekend - Swap and Workshop 5/18-19/13

by billdeg＠degnanco.com

As you know VCF E was cancelled this year, but now that power will be available we're going to hold an "open house" May 18th and 19th. WHERE: InfoAge Science Center (infoage.org) in Wall Township New Jersey 9032-A (same as last VCF Exhibit room) WHEN: May 18th 9AM through May 19th until ?? WHAT: A combo-swap meet and workshop (a.k.a. vintage computing hackfest) Half the room will be tables for working on computers. Half the room will be for consignment. We'll charge $5 if someone is merely attending, or $10 if they're bringing something to sell or repair. We'll also take 10% of sales as a consignment fee. (This income is for the club's general budget, not for food.) We will NOT do is let strangers drop off computers for us to repair. This isn't free service weekend. We will expect the MARCH veterans to serve at least some of their time during the weekend as mentors. So basically it's just like our standard work weekends, except it'll be open for outsiders to join in, and we'll formalize the "stuff available" tables so the club makes some money. OMARC's hamfest is May 18, down the street at the TIROS dish campus, from 7-11am. Our event will start at 9am. Both events will refer people to other. As at our past work weekends, this also isn't a party. we'll make some plans for light meals, but food/drink is strongly discouraged in repair/sales tables. Also discouraged are people who attend just to hang out. We might have some sort of evening "thing" TBD (We have a lot of good ideas, we'll announce soon) Just for extra caution, all attendees in the work area will sign a liability waiver. I know you're all smart and careful, but who knows with the general public... Some people may choose to bring their own items to repair. Others may opt to work on MARCH systems (you must have permission). Still others may want to be open for helping everyone else, or some combination of the above. Let me or Evan Koblentz know if you have questions - I can be reached via http://www.vintagecomputer.net/contact.cfm Bill

13 years

Oy vey! Gross mischaracterizations of our hobby.

by evan＠snarc.net

It pains me to criticize "the media" because I'm in it. But ... recently I was grossly misquoted by the financial site Bankrate.com, re: any value in vintage computing. http://www.bankrate.com/lite/smart-spending/collecting-items-as-an-investme… I don't even recall anyone from that site ever contacting me! I think the write just copied information that I told another financial site, Minyanville.com, two years ago: http://www.minyanville.com/special-features/articles/old-computer-apple-com… Bankrate's story says that a desktop PC from 1998 could be a valuable collectible, with the implication that I'm the source of such nonsense. It also says that sky-high early Apple prices are "the excitement" that "led to" formation of groups like MARCH. (As many (most?) of you know, MARCH formed back in 2005, solely to allow collectors in our region to meet, tinker on vintage computers, and have fun.) We retrocomputing folks will never have the numbers of the Beanie Baby people, but, help a brother out: go to the Bankrate story, scroll down to find my comment, and vote it "up" by clicking the caret symbol underneath and to the left of the comment. More bad news: the story was picked up by Fox Business, where presumably many more people will see it than on Bankrate, but where there's no comment system. Soooo, a bunch of people will see the Fox version and get the idea that Pentium Windows 98 computers are ** L@@K R at RE !! and worth BIG BUCKS over on eBay. Oh, joy. http://www.foxbusiness.com/personal-finance/2013/02/27/five-collectibles-to… Please know that it's not my fault. ;) - Evan

13 years

For free/for sale: 5150/5160 PSU, Apple IIe card

by fraveydank＠gmail.com

Of course, I forgot to mention: shipping from Philadelphia, PA, USA (19146). The Apple IIe card may already be claimed. - Dave

13 years

IBM I/O Selectric project

by steve＠tronola.com

Hi Lawrence, Thank you for the interesting pics and videos of the Selectric terminal. Not long ago I tossed an IBM model 50 electronic typewriter, which I had had since 1988. Have felt bad about that ever since. Now I feel worse! :) It wasn't working though, and I didn't know how difficult it would be to convert it into a terminal. By the way, the uneven spacing you were seeing is something that it would do, when the proportional spacing (PS) selector was set wrong. (Unlike many Selectrics, the model 50 did support PS.) Also enjoyed your pages on the IBM 360 model 30. Having just finished reading the excellent book, "IBM's 360 and Early 370 Systems," by Pugh, et al, the additional coverage of the "baby" model really hit the spot. Your VHDL implementation of that machine is truly stunning! All the best, Steve L.

13 years

For free/for sale: 5150/5160 PSU, Apple IIe card

by fraveydank＠gmail.com

I have two things that may be of interest to list denizens: IBM 5150/5160 power supply (part no. IBM-1501461). Appears to work if given a load, but I don't have a 5150 or an XT to test it with. Dirty, but it worked fine when I pulled it from an XT in about 1996. Free for the price of shipping. Apple IIe LC-PDS card, with breakout cable. I don't seem to be able to find the time to play with this, so I'll sell it for a pittance. Name your price and we'll see if my version of "pittance" lines up with yours. I have several functioning LCIIs as well, one of which I'll throw in free for shipping. Also, those of you who requested 5.25" 1.2M drives from me but haven't given me your address: they are still sitting more or less ready to ship in the basement. I'd like to free up some space for other things. - Dave (off-list replies, please, unless you have reason to spam the list)

13 years

VAXStation 3100 M76 Bootroms Disk Size?

by cctech＠beyondthepale.ie

> > OpenBSD is currently installing (flawlessly so far) but I think I'll know > in approx an half hour if I can boot the installed OS. > OpenBSD has sized the a partition with 900Mbytes so all the needed files > for booting should be below 1 GB. > The other thing you have to worry about is dumping. VMS uses the console ROM routines to write system dumps and these can end up in the wrong place on disks larger than 1GB on VS3100s. I don't know what unix does but if it has a dumpfile, it would be good to keep it below the 1 GB line also. Regards, Peter Coghlan.

13 years

VAXStation 3100 M76 Bootroms Disk Size?

by holm＠freibergnet.de

Hi all, I've got some ugly dirty VAXstation lately, an 3100/M76 and two 3100/M38 (if I remember correctly). I've cleaned the M76 and got it to work. Inside is an 200MB RZ24 Disk ans since I want to boot some Unix this is pretty small. I have a bunch of IBM DCAS3330 4Gig disks that where a good fit I think, but there is a problem with the System disk size on the VS3100.. The limit is coming from using six byte SCSI commands instead of the then byte versions in the boot software. I googled a litte and found this: >:Yes. It's a limitation imposed by the boot ROMs. Just ran into it >:(again!) a few weeks back and DEC reminded me yet again. Some confusion >:exists because -- I think -- some models of the 3100 were >:field-upgradable to have a new ROM set capable of supported >1 GB boot >disk. > > No member of the *VAXstation* 3100 series support system disks larger > than 1.073 gigabytes, and there are no ROM upgrades available. > > There are some members of the *MicroVAX* 3100 series that support or > can have console ROMs upgraded to support system disks larger than > 1.073 gigabytes. I do have KA43 V1.2 Bootroms in the M76, so the question is: Are there newer ROM versions than 1.2 und is there support for larger System disks? Burning Roms is no problem. Does someone have a newer firmware version? I know that I can use the 200MB Disk to boot and use the larger for data, but at least I do have a mechanical problem here, I had to make some plastic Bumpers to mount the additional disk in the VS3100 on the lathe. I would better use the RZ24 in one of my PDP 11's... Kind Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

13 years

OT: 1000 year DVD storage

by barythrin＠gmail.com

I think the filesystem format is just called iso 9660. I believe the writer reads the info on the inner plastic and gets the media type since not only does it know the difference in size but it also reads the media speed rating to know not to burn at a higher than x speed (unless the user overrides that setting). ------Original Message------ From: Fred Cisin Sender: cctalk-bounces at classiccmp.org To: General Discussion: On-Topic and Off-Topic Posts ReplyTo: General Discussion: On-Topic and Off-Topic Posts Subject: Re: OT: 1000 year DVD storage Sent: Mar 23, 2013 2:44 PM On Sat, 23 Mar 2013, Jerome H. Fine wrote: > Since a DVD drive can read both a CD and a DVD (as well > as, for many drives, but not all) burn both a CD and a DVD, > the media can't be that different. However, since my DVD > drive is able to distinguish between a DVD blank and a CD > blank, I assume that the media must be somewhat different. Is there some info pre-recorded?

13 years

Get a board Xerox 820-II working fine

by enrico.lazzerini＠email.it

Hello everyone, I got a board Xerox 820-II without any other components and without disk controller. After changing the video sync and created a composite video on video i have the correct prompt. I made a keyboard interface to convert a PS2 keyboard in parallel with the same schematic that works well with my Ferguson Bigboard I and the other card Xerox 820-I. I saw that on the xerox 820-II board there are almost 2 ICs with the name Signetics 3341PC (U102 and U101) that are between the U65 (system and Keyboard PIO) and the 72LS74 (U96 and U97) that come to connect to the keyboard input (see sheet 7 of thsi schematic http://bitsavers.trailing-edge.com/pdf/xerox/820-II/Xerox820-II_Schematics.p df). I come to requests: 1) The keyboard does not write. I read on a post that I can not find anymore that without the inclusion of the disk controller card into its slot the keyboard would not write. Perhaps because there is not anymore the continuity of the chain interrupt (see at the bottom of sheet 8 close to U65 into this schematic http://bitsavers.trailing-edge.com/pdf/xerox/820-II/Xerox820-II_Schematics.p df )? 2) If i not find the disk controller card I was thinking about to self-build it on a bareboard hoping that the diagram at the bottom of the last pages at http://bitsavers.trailing-edge.com/pdf/xerox/820/Xerox820_ServiceMan.pdf is accurate. Where can I find a card edge connector male 72-pin 2.54mm pitch? 3) You also have some suggestions for me? Thanks so much Enrico - Pisa - (Italy)

13 years

Univac 3 video on youube

by jws＠jwsss.com

I mentioned having a Univac 3 available for sale and have some interest. When I watched a video linked to by a person on the IBM-MAIN mailing list some time ago, there was a few Univac links, so I looked to see what was there for Univac 3 this turned up which is supposed to be the US Army system http://youtu.be/ICGPML5lzoY There are tape drives in the short bit of video which are not Uni-servo's and are probably not connected to the Univac near the end, but you can see the system's drives in one bit of the video. NOte that it had no disk storage it was all tape with the OS at the BOT of every volume, or bits of the application. Anyone recognize the logo on the tape drives (probably not Univac) at the 23 sec point? it is a big red circle with two side bars. Rings a bell to me but I haven't figured it out yet. There was also a CHM show about timesharing with Univac that came up, but I don't think the tape drives are the same Uniservo's that the U3 used, so is probably later. Also the theme is timesharing which of course the U3 was definitely not ever going to do. thanks Jim

13 years

OT: 1000 year DVD storage

by tom_a_sparks＠yahoo.com.au

> On Mar 22, 2013, at 10:49 AM, Mouse <mouse at rodents-montreal.org> wrote: > > Often enough, especially with governments, the person put in > charge of data preservation is not someone who has the foggiest > idea of how to actually go about it.? They then have to rely on > other people to do it, which is great if you know the right > people and disastrous if you only THINK you know the right > people. these so called consultants have never * used linux/unix or a 1980's or earlier computer system * moved data between these system with sneakernet/null-modem[1] setup > - Dave [1] trying asking at your local computer shop about a Null-modem cable tom sparks

13 years

DEC Q-Bus DLV11 M7940 SLU Documentation

by pbirkel＠gmail.com

Resend without attachments (too big; sorry 'bout that :-<). Anyone interested in the missing attachments please contact me off-list. On Sat, Mar 23, 2013 at 3:17 AM, Paul Birkel <pbirkel at gmail.com> wrote: > No PDP-11-eating, please! The BC05C cable, and also the 7008360 cable, > seems to be the key; these are shared across a number of DEC > modules/variants. > > Finding documentation is quite a Where's-Waldo exercise, but a lot of it > is "out there" it seems :->. In my case the attached two items were > extracted from larger, varied, documents. Perhaps they'll be useful for > the next challenged person :->. > > On Mon, Mar 18, 2013 at 5:08 PM, Tony Duell <ard at p850ug1.demon.co.uk>wrote: > >> > >> > --f46d0444e88960605904d821f7a5 >> > Content-Type: text/plain; charset="ISO-8859-1" >> > >> > Can some kind soul point me to the technical documentation for the Q-Bus >> > DLV11 M7940 Serial Line Unit? It has a 2x20 pin-out connector of >> unknown. >> > I gather that it's a pretty common card, so I'd expect the >> documentation to >> > still be "out there" ... like the truth :->. >> > >> > Not the DLV11-J, which is the 4-line card. >> > >> > The only good news is that the MC1488 and MC1489 are nearby, which will >> > help a little. But documentation is *much* better! Probably any of its >> > variants will do just fine (e.g., M7940-YA "M7940 W EXTRA WIRES TO BRING >> > OUT CLOCK & 110/300 SPEED CHG"). >> >> It should be much the same as the pinout for the DL11 (Unibus) seiral >> interface or even the DL8 (Omnibus). It's a very ocommon DEC serial port >> pinout. If there's no documetnaiuton on _any_ of thsoe out there, I will >> eat a PDP11 or something. >> >> One trap for the unwary. These cards, or at least some of them, have >> both RS232 and current loop interfaces on them. The outputs of the 2 >> possible receive buffers (1489 for the RS232, a nopo-isolator bnsed >> circuit for current loop) appear on pins of this conenctor, as does the >> inptu to the UART chip. You have pumper the appropriate pair of pins on >> the connecotr of your cable. if you don't, you'll never receive anything. >> >> -tony >> > >

13 years

XY8E plotter control docs?

by hachti＠hachti.de

Hi, does anyone have XY8E plotter control schematics at hand? I just plugged one into my currently active pdp8/e and it doesn't work :-( And then I realized that I don't have schematics. At least not on my PC. And the links on pdp8.net seem to be dead to me. If anyone does have the schematics on his/her PC, please drop me a line. But don't invest time to scan it. I'm quite sure that I have an original *somewhere* in piles of paper... Thank you Philipp -- Dipl.-Inf. (FH) Philipp Hachtmann Buchdruck, Bleisatz, Spezialit?ten Alemannstr. 21, D-30165 Hannover Tel. 0511/3522222, Mobil 0171/2632239 Fax. 0511/3500439 hachti at hachti.de www.tiegeldruck.de UStdID DE 202668329

13 years

RK05 drive foam deterioration and replacement

by steve＠tronola.com

>The foam flaked off and seems to be deteriorating. --- Hi Carl, Just to add to Philipp's excellent advice: I replaced the foam in my RK05 with 1-inch high density foam from a JoAnn store: http://www.joann.com/airtex-foam-chairpads-1-high-density/prd23481/?green=C… Their warning not to cut with hot wire is not to be ignored! I found that cutting with an electric knife worked well. Used contact cement to glue it to the blower flange. Works great. There is about 3/4" clearance between card cage and blower, so it compresses appropriately. By the way, removal of the blower is a pill. The fasteners are buried deep and require a hex key driver that is much longer than ordinary ones. Found an inexpensive set at Home Depot, which did the job. One fastener is particularly hard to get to. I decided to replace the hex fasteners with ordinary screws and emphatically did not install the fourth one. Three work fine. Note that the Velcro strap which is used to tighten the absolute filter is laid under the blower mounting, to secure it. I used adhesive to keep it in place when the blower is removed. I notice that a lot of these drives seem to be missing the prefilter, as mine was. I used a common window screen kit to make the replacement filter. Used window screen on the outside but 100um nylon filter fabric from eBay, also tucked into the spline on the inside. Makes a decent facsimile of the original prefilter. You can buy new-old-stock replacement absolute filters here: http://www.varx.com/ I paid $60, plus shipping. A tip about getting the old filter out: I found it difficult to pull the filter off of the flange leading to the blower. Thinking that I must not be doing something right, I ended up pulling the blower off again to see what was happening. Finally decided that the old filter just had to be yanked off. Perhaps the plastic has stiffened with age. It finally came off. One thing that distracted me was the fact that, in spite of the flange blocking removal, the absolute filter fits the blower duct very loosely. Hence, a Velcro strap is provided to tighten the filter against the duct. Some might think all this attention to filtering is overkill but after seeing the illustration on p. 1-17 of the 1976 RK05 maintenance manual of the 100um head flying height versus various contaminants, I have been very careful about dust. It's a relief that Philipp has had not-so-bad experiences with head crashes but I would like to minimize the risks. Steve L. http://www.tronola.com/

13 years

TRS-80 Model III sighting

by barythrin＠gmail.com

Awesome MARCH :-) you preemptively answered my question if anyone here had helped with the computers. Have to check it out just for that.

13 years

TRS-80 Model III sighting

by oltmansg＠gmail.com

Don't know if any of you guys watch "The Americans" on FX. For those not in the know, this show follows two KGB operatives living as Americans in the US during the height of the Cold War in the early 80's. In the episode from this week, there was a scene in an FBI building and in the background there was a TRS-80 Model III sitting next to a bank of tape drives.

13 years

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