Re: Searching for a lost Macintosh TV (Texas)

On Mon, 5 Dec 2016, Ian Finder wrote: Props for for having a good sense of humor. It made me laugh. Seriously though I hate to say it but your quest feels pretty damn futile. I wish you luck either way, and would offer you my MacTV but it is long gone. If you can provide names of unique f

Re: Searching for a lost Macintosh TV (Texas)

On Mon, 5 Dec 2016, Ian Finder wrote: They sold 10,000 Apple TVs. That's a lot. You lost track of one ten years ago, and have given no real methodology for discerning it from any other- the number out there with OS 7.6 or 8mb of ram will be significant. Perhaps you should go door-to-door, o

Re: Black anti-static foam corrosion

could likely come up with the model/serial numbers too. (We know who took the HAM radio gear, but couldn't really do much about it.) http://strudel.ignorelist .com/~tothwolf/classiccmp/stolen_nikon_camera_gear.txt

Searching for a lost Macintosh TV (Texas)

I'm not really active in any of the classic computing communities apart from classiccmp, so I would appreciate it if others could pass this message around and see if this computer ended up in the hands of a fellow collector. A good friend of mine who lived in Spring, TX (north of Houston) owne

Re: Possibly rarest Apple 1 ever for auction

On Sat, 23 Jul 2016, Corey Cohen wrote: My guess is that is was a test board for Apple. There are some weird mods to the ram timing with a variable cap and to the negative supply that looks like they were experiments to figure out the tolerances of the chips. The board was wave soldered. Yo

Re: heap of floppy disks

On Fri, 22 Jul 2016, devin davison wrote: I picked up two crates jam packed full of floppys today. Bunch of random old utilities in there, borland turbo asm, turbo pascal, windows for workgroups etc. I found a set of disks with the DEC digital logo on them. 4-5 disks, says dos for the dec pc

Re: Possibly rarest Apple 1 ever for auction

On Fri, 22 Jul 2016, Corey Cohen wrote: There were no blank boards. That's the key. The sockets were wave soldered by the PCB manufacturer according to Woz. There were 2 runs of 100 boards each. This is also an early layout board (Non NTI) but with different wave soldered sockets than the tw

Re: Connectors: Both contact surfaces must also be the same material?

On Sun, 10 Jul 2016, Jon Elson wrote: On 07/10/2016 12:07 PM, Paul Koning wrote: On Jul 10, 2016, at 9:07 AM, Tothwolf wrote: On Sun, 10 Jul 2016, Paul Birkel wrote: Stated Tothwolf tothw...@concentric.net: "Both contact surfaces must also be the same material or tin oxide will form o

Re: Looking for old connectors

On Sun, 10 Jul 2016, Oliver Lehmann wrote: One is easy - J3 is a 2x10 pin 2.54mm connector which is still common today. But it is higher than the usual connectors. It has a hight of 1.5cm. If you search for the printed A-MP number (1-87456-6), you'll find the housing, but not the soldered clips

Re: Connectors: Both contact surfaces must also be the same material?

On Sun, 10 Jul 2016, Paul Birkel wrote: Stated Tothwolf tothw...@concentric.net: "Both contact surfaces must also be the same material or tin oxide will form on the surface of the gold plating and cause a major headache. This was a serious problem with 486 and earlier Pentium PCs with 3

Re: Looking for old connectors

On Sat, 9 Jul 2016, Jon Elson wrote: On 07/09/2016 09:18 AM, Tothwolf wrote: On Sat, 9 Jul 2016, Mike Stein wrote: From: "Tothwolf" On Sat, 9 Jul 2016, Oliver Lehmann wrote: Hi, for rebuilding a circuit, I'm in need of 3 old connectors used on the

Re: Looking for old connectors

On Sat, 9 Jul 2016, Mike Stein wrote: From: "Tothwolf" On Sat, 9 Jul 2016, Oliver Lehmann wrote: Hi, for rebuilding a circuit, I'm in need of 3 old connectors used on the original board. ## The next one is also a power plug - but I have no idea about

Re: Looking for old connectors

On Sat, 9 Jul 2016, Oliver Lehmann wrote: Hi, for rebuilding a circuit, I'm in need of 3 old connectors used on the original board. ## The next one is also a power plug - but I have no idea about its AMP number or something: http://pics.pofo.de/gallery3/index.php/S8000

Re: Repairing a Supermicro P6DLF motherboard

On Wed, 6 Jul 2016, Tothwolf wrote: On Tue, 5 Jul 2016, Tothwolf wrote: The electrolytic capacitors on this particular board at locations CE1 and CE6 have Sanyo OS-CON 220uF 10V polymer parts (purple sleeve and appear to be 10SA220M) fitted and the solder work was done by hand. The joints

Re: Repairing a Supermicro P6DLF motherboard

On Tue, 5 Jul 2016, Tothwolf wrote: The electrolytic capacitors on this particular board at locations CE1 and CE6 have Sanyo OS-CON 220uF 10V polymer parts (purple sleeve and appear to be 10SA220M) fitted and the solder work was done by hand. The joints were completely defluxed/cleaned, but

Repairing a Supermicro P6DLF motherboard

I'm currently in the process of repairing a Supermicro P6DLF motherboard which suffered shipping damage and I'm trying to find anyone else who might have one. I can't find any photos of one of these boards online (except for the one I recently purchased) and the board I have shows possible sign

Re: Actually we want this Packard Bell http://www.smecc.org/itemsklkljl; _3.jpg

On Sun, 3 Jul 2016, Liam Proven wrote: On 3 July 2016 at 05:00, Tothwolf wrote: I think the same could probably be said for something like that 6-processor Pentium Pro that was sold in the late 90s which had a black cube style case and a stand which allowed it to sit on its corner. Very

RE: Actually we want this Packard Bell http://www.smecc.org/itemsklkljl; _3.jpg

On Sat, 2 Jul 2016, Jay West wrote: Ed wrote... - Not just any Packard Bell... just this one. http://www.smecc.org/itemsklkljl;_3.jpg it has a place due to form and design, certainly not performance. - IMOO no place at all. If it had some kind of cult following, or lots o

Re: Tandy TRS0-Model 2000 Computer Monitor required

On Wed, 29 Jun 2016, Brendan McNeill wrote: Looking for a Tandy TRS-80 Model 2000 compute monitor. Wikipedia description here: https://en.wikipedia.org/wiki/Tandy_2000 The monochrome is model VM-1 Monitor, the colour is CM-1 Monitor. Does your s

Re: USPS: Shipping

On Mon, 1 Feb 2016, Guy Sotomayor wrote: On Feb 1, 2016, at 10:30 AM, Ken Seefried wrote: On Sun, 31 Jan 2016, Tothwolf wrote: On Sun, 31 Jan 2016, Pete Lancashire wrote: Spend the extra few dollars (or what your currency is) and pack it in very strong box. I've actually had EPROMs sh

Re: USPS: Shipping

On Mon, 1 Feb 2016, Norman Jaffe wrote: I've had even more fun with UPS - there was a big hole punched in the side of a tape library that was shipped to me, completely destroying the library. The hole matched the fork on a forklift truck. UPS insisted that the hole existed before they shipped

Re: PDP-11/03, LSI-11 KEV11-C CIS option

On Sun, 31 Jan 2016, Pete Lancashire wrote: On Sun, Jan 31, 2016 at 1:24 AM, Henk Gooijen wrote: OK, if nobody in the USA steps up, I will check where I have stored that little box. At least, I am pretty sure I have that chip. I can do that this week. Insured shipping would not cost much is i

Re: Can Windows 98SE run on an Intel I7 with SATA hard drives?

On Sun, 31 Jan 2016, Noel Chiappa wrote: > From: CuriousMarc > Needless to say, you'd only boot to this Windows 98 for retro-computing > purposes. BTW, are you indicating that Win 98SE _in general_ should only be used for retro-computing, or only Win 98SE _in the particular configration you

Re: IBM 3101-12 ASCII terminal - need fuse holder

On Fri, 29 Jan 2016, Ethan Dicks wrote: On Fri, Jan 29, 2016 at 2:39 AM, Tothwolf wrote: On Thu, 28 Jan 2016, Ethan Dicks wrote: I was just gifted with an IBM 3101-12 ASCII terminal that happens to be missing the fuse and fuse holder. Unlike a lot of 1960s and 1970s gear, it's not

Re: IBM 3101-12 ASCII terminal - need fuse holder

On Thu, 28 Jan 2016, Ethan Dicks wrote: I was just gifted with an IBM 3101-12 ASCII terminal that happens to be missing the fuse and fuse holder. Unlike a lot of 1960s and 1970s gear, it's not round. It's square. Is this a standard IBM thing from the 70s/80s? Anyone know where I could get

Re: Can Windows 98SE run on an Intel I7 with SATA hard drives?

On Thu, 28 Jan 2016, Chuck Guzis wrote: The latest rig that I've run 98SE on is a Intel P3 (440GX) with 2GB of memory. I can do it, but it took the "unofficial final service pack" to reduce the amount of memory to something reasonable. Drivers, I think would be the stumbling block on modern

Re: VT100 PSU smelling.

On Sat, 23 Jan 2016, Jules Richardson wrote: On 01/22/2016 06:26 PM, Tothwolf wrote: The translucent yellow Rifa (now owned by Kemet) class X/Y safety capacitors in particular have a 100% failure rate and are on my replace-on-sight list. They usually begin to show visible signs of cracking

Re: ESR meter recommendations.

On Sat, 23 Jan 2016, Mattis Lind wrote: 2016-01-23 13:54 GMT+01:00 Noel Chiappa : If you do a lot of work with analog components (and it sounds like you do), it's probably worth getting capacitance and ESR meters, they can be obtained (new) on eBay for not that much. I have one of each that I

RE: VT100 PSU smelling.

On Sat, 23 Jan 2016, tony duell wrote: Incidentally, some machines have those sealed metal cans containing filter capacitors, inductors and sometimes discharge resistors [2]. Has anyone ever had the capacitors in one of those fail? Actually, yes. I had one fail in one of my scopes. I don't re

Re: VT100 PSU smelling.

On Sat, 23 Jan 2016, Mattis Lind wrote: I don't have a ESR meter or similar. It is not shorted at least and the resistance is in the several mega ohm range when measuring in circuit. Are they likely to go bad in a non catastrophic way? They can. The translucent yellow Rifa (now owned by Kemet

Re: RIFA EMI caps [WAS: Re: VT100 PSU smelling.]

On Sat, 23 Jan 2016, Chuck Guzis wrote: On 01/23/2016 02:40 PM, Pontus wrote: All I could find were new similar Kemet capacitors. Do you know if newer Kemet suffer from the same problem and I will regret buying them? I usually replace the Rifa capacitors with equivalent polyester safety caps

Re: VT100 PSU smelling.

On Sat, 23 Jan 2016, Mattis Lind wrote: 2016-01-23 0:32 GMT+01:00 Peter Coghlan : R27 is part of the snubber network on the primary side of this forward-type SMPS PSU. But why it it getting so hot. Is it normal? I have completely forgotten how a VT100 smell when running... Snubber as in a re

Re: Looking for 3COM 3C905-TX Drivers

On Sat, 26 Dec 2015, Robert Jarratt wrote: Not too long ago I picked up a DEC Venturis FX 5120. It contains a 3COM 3C905-TX network card. There are some sites around the web that purport to have drivers for this card, but I am very wary of downloading anything from these sites. Does anyone h

Re: Looking for 3COM 3C905-TX Drivers

On Sat, 26 Dec 2015, Adrian Graham wrote: On 26/12/2015 00:45, "Robert Jarratt" wrote: Not too long ago I picked up a DEC Venturis FX 5120. It contains a 3COM 3C905-TX network card. There are some sites around the web that purport to have drivers for this card, but I am very wary of downloadi

RE: EAI TR-10 Patch Plugs

On Mon, 21 Dec 2015, Dave G4UGM wrote: On Sun, 20 Dec 2015, Charles Anthony wrote: Or, rather then cutting it, remove the inside threads on the shell, and glue it back on to the plug, rather than screwing it on. That’s about the best method, but there is not much room for extra lead to push

Re: Mystery IC: Allen Bradley 314B102

On Tue, 15 Dec 2015, Mike Ross wrote: On Tue, Dec 15, 2015 at 4:59 AM, tony duell wrote: This board does not look that complicated and all the ICs have known numbers on them (mostly TTL logic). If it were mine I'd trace out the schematic. That's true and possible. I'm in two minds on this t

Re: tool for installing pin in PCB extractors?

On Sat, 24 Oct 2015, Chuck Guzis wrote: On 10/24/2015 09:49 PM, Eric Smith wrote: What tool does one use to install the metal pin into a plastic PCB extractor, e.g., the Bivar CP-36 or Keystone 8642? There are expensive tools for the purpose, but I've always just used a pair of long-nose pli

Re: Speaking of reproductions..

On Sat, 24 Oct 2015, Brad wrote: I was checking out the Altair 8800 kit online (really cool). But I am hoping to one day find a kit or plans to build a Mark-8 replica, since I'm so deep into Radio Electronics features. I know there was a kit out there (Obtronix?). Was it any good? Do I nee

RE: Opening a DECserver 90M External PSU

On Sun, 18 Oct 2015, Robert Jarratt wrote: I had another go today, but I fail to see how you managed to pry this thing apart without causing much more damage than appears in your photo. What kind of tool did you use? My usual technique to deal with these sort of brick and wall-wart PSUs that

Re: Q-bus I/O project

On Fri, 9 Oct 2015, John Wilson wrote: On Fri, Oct 09, 2015 at 09:48:18PM -0500, Jay Jaeger wrote: Do U17,U15,U10,U6 perhaps have some solder bridges, or is that just some flux hanging around? It's flux, but thanks for the heads-up! I went over everything with liquid-flux-soaked solder-wick

Re: Compaq Portable II - IDE compatibility (and setup disk image)

On Tue, 6 Oct 2015, Tothwolf wrote: On Mon, 5 Oct 2015, Jules Richardson wrote: My Portable II uses a Miniscribe ST506/412 drive hooked up to a bridge board that I'm told is IDE at the other side, back to the controller. The original drive in my machine is toast - I had to pop the l

Re: Compaq Portable II - IDE compatibility (and setup disk image)

On Mon, 5 Oct 2015, Jules Richardson wrote: My Portable II uses a Miniscribe ST506/412 drive hooked up to a bridge board that I'm told is IDE at the other side, back to the controller. The original drive in my machine is toast - I had to pop the lid to free the spindle. It spins up now, and mi

RE: Troubleshooting a 286.. oscope level!

On Sat, 3 Oct 2015, et...@757.org wrote: I might be able to get hold of the bios, but I'm worried about the 3rd EPROM. It sits in the middle of a bunch of Yamaha branded chips. The BIOS chips are in the middle of a Chips & Technologies 286 chipset group. The people I find might be able to dump

Re: One more try - Can you ID this S-100 Serial board?

On Thu, 1 Oct 2015, chocolatejolli...@gmail.com wrote: Been trying to no avail to find any info on this 'MCT' S-100 serial card. Could this MCT be Modular Circuit Technology, the generic brand of add on cards once sold in the JDR Microdevices catalog? Possibly, I mentioned this in the other

Re: One more try - Can you ID this S-100 Serial board?

On Wed, 30 Sep 2015, jwsmobile wrote: I couldn't spot how they did level shifting to RS232 levels. The SI signal appears to go to a 7400 next to one of the Uarts. One of the Uarts is one which requires it would seem 12 v as well, but it doesn't do the levels for rs232 (AY-3-1015) I'd need

Re: ESR Meter Recommendations

On Wed, 30 Sep 2015, John Robertson wrote: On 09/30/2015 5:22 PM, Tothwolf wrote: I bought a kit from anatekcorp.com last year to replace my Dick Smith version that spouted legs and was rather disappointed with how it had been kitted up. A lot of the components were very low quality or did

RE: ESR Meter Recommendations

On Wed, 30 Sep 2015, Jay West wrote: Question - I could be mistaken, but I think someone mentioned that these were not good for testing caps that had a higher operating voltage. Is that correct? My understanding was that the testing method used by this ESR meter was valid for most all the larg

Re: ESR Meter Recommendations

On Wed, 30 Sep 2015, John Robertson wrote: On 09/29/2015 2:59 PM, Jay West wrote: This is the one I have used for years. http://clientes.netvisao.pt/greenpal/evb1.htm About $88 USD That is an authorized Bob Parker variation of his original Dick Smith ESR meter kit. On this side of the

Re: Small glass capacitors polarized?

On Sun, 27 Sep 2015, Noel Chiappa wrote: > From: drlegendre > I'm not sure what you're describing. Can you link to a pic of one of > these caps? http://www.electrical4u.com/images/glass-capacitor.jpg These are hermetically sealed ceramic and are non-polarized. The glass encapsulation made

Re: IBM 026

On Sat, 19 Sep 2015, Able Baker wrote: On Fri, 18 Sep 2015, Todd Goodman wrote: On Fri, 18 Sep 2015, Noel Chiappa wrote: Well, here's an 029 (not quite what the OP was looking for, but good enough for you all, I expect) for a not insane amount of money: http://www.ebay.com/itm/281796720725

Re: Electronic devices and borders - Re: Possible road trip....Illnois, Canada, Maine and back

On Fri, 4 Sep 2015, Toby Thain wrote: On 2015-09-04 5:20 PM, Jason T wrote: read my email on my phone I hope everyone saw that and understands what it means. Borders have changed. Any data you take across them is fair game. Indeed they have. ...and things continue to change: https://en.wi

Re: Keys resurfaces

On Fri, 4 Sep 2015, jwsmobile wrote: On 9/4/2015 12:54 PM, Tothwolf wrote: On Fri, 4 Sep 2015, William Donzelli wrote: It seems to happen all the time with collectables (I must admit I have a loft room full, and I don't have anywhere to exhibit) but to me this needs PEOPLE and then a

Re: Keys resurfaces

On Fri, 4 Sep 2015, William Donzelli wrote: It seems to happen all the time with collectables (I must admit I have a loft room full, and I don't have anywhere to exhibit) but to me this needs PEOPLE and then a PLAN and lastly a Kick Starter project to get it exhibitable, if indeed any of it is

Re: Possible road trip....Illnois, Canada, Maine and back

On Fri, 4 Sep 2015, William Donzelli wrote: Yes. ALL the ducks. Several of us have been bounced at the border for trying to bring in larger machines. Basically, if it is something that is not a laptop or PeeCee or normal consumer electronics, expect trouble. It is not 1998 anymore. Do "Mad

Re: Keys resurfaces

While I've not yet completely forgiven Mr. Keys for swiping a van load of VAX systems (including a bunch of MicroVAX 3100, 4000/VLC, etc) over a decade ago when I had offered him some wide format printers and large monitors, I'm willing to talk to him and see what can be done if others are also

Re: De-yellowing results

On Sun, 30 Aug 2015, Chuck Guzis wrote: On 08/30/2015 05:55 PM, Tothwolf wrote: Wrong type of UV. You are mostly getting long wave UVA outdoors, so blacklight lamps would seem to be the correct (and MUCH safer) choice. When I looked at 24" T8 bi-pin blacklight lamps, they were goin

Re: Sales of unearthed Atari games total more than $100,000

On Sun, 30 Aug 2015, drlegendre . wrote: On Sun, Aug 30, 2015 at 1:41 PM, Ali wrote: How might a collector discern a "landfill" E.T. cart from any other E.T. cat that some snarky guy buried in the clay of his back forty? Not that I am expert or anything but my understanding is that the ET c

Re: IBM 1620

On Sun, 30 Aug 2015, ben wrote: On 8/30/2015 6:32 PM, Tothwolf wrote: On page 5, they describe 0.0031" 40 AWG magnet wire being reduced to 0.002" after soldering with 60/40 tin-lead solder. That 0.0011" reduction is basically 1/3 of the diameter of the wire. This explains the

Re: De-yellowing results

On Sun, 30 Aug 2015, Chuck Guzis wrote: On 08/30/2015 11:08 AM, Jules Richardson wrote: On 08/28/2015 12:08 PM, Evan Koblentz wrote: We're thinking about building that kind of "deyellowing station" in the MARCH warehouse. Hmm, single UV lamp, couple of stepper motors and a couple of circular

Re: IBM 1620

On Sun, 30 Aug 2015, Paul Koning wrote: On Aug 30, 2015, at 1:55 PM, Chuck Guzis wrote: On 08/30/2015 09:47 AM, Tothwolf wrote: If repair of the core memory in CHM's IBM 1620 is ever attempted, I think either low-tin solder alloy with 1-2% added copper or possibly a more modern indium

Re: IBM 1620

On Sun, 30 Aug 2015, Chuck Guzis wrote: On 08/30/2015 09:47 AM, Tothwolf wrote: If repair of the core memory in CHM's IBM 1620 is ever attempted, I think either low-tin solder alloy with 1-2% added copper or possibly a more modern indium-lead solder alloy would probably be the best choic

Re: IBM 1620

On Sun, 30 Aug 2015, Chuck Guzis wrote: On 08/30/2015 11:15 AM, Paul Koning wrote: So there'd be what, 120,000 cores to thread? That might be a bit daunting from a human-hour standpoint. I'll wager that 120K cores wasn't even a day's output for outfits like Fabritek. Those cores weren't th

RE: IBM 1620

On Sun, 30 Aug 2015, Dave G4UGM wrote: On Sat, 29 Aug 2015, Tothwolf wrote: IBM had special machines to position and thread them. http://ibm-1401.info/IBMCoreArraysIEEEMagnetics1969.pdf Thanks for posting that. Very interesting. Looking at it, the machines are extremely complex, but I am

Re: IBM 1620

On Sat, 29 Aug 2015, Paul Koning wrote: On Aug 29, 2015, at 12:36 AM, Lyle Bickley wrote: I was not on the Team that did the memory analysis and the ultimate "modern" replacement memory. However, when I joined the Team, I asked similar questions and was told that the core memory was literally

Re: IBM 1620

On Fri, 28 Aug 2015, Lyle Bickley wrote: On Fri, 28 Aug 2015 20:31:16 -0500 (CDT) Tothwolf wrote: I think I've answered my own question today while looking at a datasheet for another type of solder. My guess is that the solder they used did not contain any copper, and the tin in the s

Re: IBM 1620

On Fri, 28 Aug 2015, Chuck Guzis wrote: On 08/28/2015 07:42 AM, Tothwolf wrote: With all the different solder alloys I work with regularly, I have to ask...what type of solder caused that sort of damage? Was it the alloy itself, or did IBM use a flux which was too active and then failed to

RE: De-yellowing results

On Fri, 28 Aug 2015, Ali wrote: On Fri, 28 Aug 2015, Evan Koblentz wrote: Not a concern: we'd just build a walled tub of sorts, put in enough de- yellowing solution to cover the yellowed item in question, and have the plexi sitting well above it. The solution would never be anywhere near the

RE: De-yellowing results

On Fri, 28 Aug 2015, Ali wrote: Ah! That explains my lack of results. I soaked the keys for five or six hours. They got clean, but didn't change color very much. Sounds like I pulled them out too soon. Several days, you say? Has anyone tried a glass/plexi-glass bath w/ UV lights? It might get

Re: IBM 1620

On Thu, 27 Aug 2015, Lyle Bickley wrote: The IBM 1620 at the CHM is a running computer. There were two teams that worked on the 1620 at the CHM. The first Team got it running. Unfortunately, IBM used the wrong kind of solder on the core memory and so the wires of the core memory literally "dis

Re: In Realtime: Saving 25,000 Manuals — August 15, 2015

On Mon, 24 Aug 2015, Jason Scott wrote: On Mon, Aug 24, 2015 at 2:16 PM, Dave Woyciesjes wrote: On 08/21/2015 08:08 PM, Liam Proven wrote: On 15 August 2015 at 13:03, Liam Proven wrote: http://ascii.textfiles.com/archives/4683 Apologies if this is old news... Some pictures, from sun-res

Re: HP 5480A, or, obscure HP instruments

On Mon, 24 Aug 2015, Peter Brown wrote: Was there any resolution to the original request for HP5480A service information? I have fiches for this instrument as follows 1. 5480A - Signal Analyzer Operating manual Part 1 - 05480-90014(fiche) - 2 fiches, 60 pages per fiche 2. 5480A/B - Signal An

Re: Larry Niven's Altair

On Thu, 20 Aug 2015, Paul Koning wrote: On Aug 20, 2015, at 10:30 AM, Jay Jaeger wrote: On 8/20/2015 3:32 AM, Randy Dawson wrote: I assume all the 8K, 4K BASICs are in public domain by now. The demo for the kids will be the 15 minutes of paper tape, followed by READY. Bad assumption. Thin

RE: De-yellowing

On Sat, 22 Aug 2015, Dave G4UGM wrote: On Sat, 22 Aug 2015, Pete Turnbull wrote: On 22/08/2015 13:50, Tothwolf wrote: On Sat, 22 Aug 2015, Dave G4UGM wrote: All the techniques discussed so far involve using a "bleach" of some kind and possibly UV light. Some use other materials so

Re: De-yellowing

On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/22/2015 07:48 AM, Tothwolf wrote: On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: Google for "Retr0brite". I've never tried the stuff - but is it a permanent fix, or does the yell

Re: HP 5480A, or, obscure HP instruments / was Re: More on manuals plus rescue

On Thu, 20 Aug 2015, Jay Jaeger wrote: On 8/20/2015 7:11 AM, tony duell wrote: They reuse numbers for what I call "marketing numbers". For example, with a LaserJet 8150dn, the "8150" is a "marketing number" and not the actual HP product number, which was C4267A. As far as I know they've ne

RE: De-yellowing

On Sat, 22 Aug 2015, Dave G4UGM wrote: On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: So, how does one de-yellow something? I have a VT-100 and some other gear that could use that process. Google for "Retr0brite". I've never tried the stuff - but

Re: De-yellowing

On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: So, how does one de-yellow something? I have a VT-100 and some other gear that could use that process. Google for "Retr0brite". I've never tried the stuff - but is it a permanent fix, or does the yel

Re: More on manuals plus rescue

On Fri, 21 Aug 2015, geneb wrote: On Fri, 21 Aug 2015, Evan Koblentz wrote: On Wed, 19 Aug 2015, et...@757.org wrote: Years ago I needed a HP service manual for a plotter I was trying to repair that I owned. HP of course wouldn't let me have it, so I had to buy a PDF copy from someone on eBay

Re: Vintage Software Copyright

On Fri, 21 Aug 2015, Chuck Guzis wrote: On 08/21/2015 10:11 AM, Rod Smallwood wrote: Yes OK and "very long" would be? It varies by country. In the case of the USA, 95 years from publication (for older works) Other countries employ the author's life+x years (usually 50 or 70)--live to a r

Re: More on manuals plus rescue

On Wed, 19 Aug 2015, Sean Caron wrote: On Wed, Aug 19, 2015 at 7:50 PM, William Donzelli wrote: On Wed, 19 Aug 2015, Tothwolf wrote: I have to disagree strongly with Will on this. There are quite a few "PDF manual dealers" who honestly deserve to go out of business. Those "d

Re: More on manuals plus rescue

On Wed, 19 Aug 2015, Tothwolf wrote: On Wed, 19 Aug 2015, William Donzelli wrote: Yes, let the guys keep selling the higher demand documents - HP, Tek, Heathkit. Nearly all of those are super common anyway (and plus, you will run into problems posting Heath material). Focus on the weirder

Free manuals (was: Re: Manuals Plus preservation efforts update)

I just heard from Becky this afternoon (I've been in regular contact with her) and she has said that anything left is now up for grabs. This is part of what she wrote me today: "If you know of anyone that wants to come here & help themselves over the next two days they are welcome. (Only if yo

Re: More on manuals plus rescue

On Wed, 19 Aug 2015, William Donzelli wrote: On Wed, 19 Aug 2015, Jason Scott wrote: That is a most interesting metric. I honestly hadn't considered that issue. The key, I think, will be communication with them to understand which manuals have sales going on, and which ones it would be advant

Re: More on manuals plus rescue

On Wed, 19 Aug 2015, Jason Scott wrote: On Wed, 19 Aug 2015, William Donzelli wrote: In closing, I might ask you to consider taking your sweet time getting this stuff online. There are still some manual dealers out there. Let them handle the decline of their business in whatever way they see f

Re: More on manuals plus rescue

On Wed, 19 Aug 2015, William Donzelli wrote: Are you serious? Jason is currently sweating his balls off trying to save at least a portion of a huge warehouse of unique documentation under an incredibly tight deadline. Just for the record, the Manuals Plus hoard is not, in any way, a bunch of

Re: More on manuals plus rescue

On Tue, 18 Aug 2015, Shoppa, Tim wrote: I certainly feel bitsavers is a good model, and although I'm physically not too far away from the stuff, I'm not sure I have much to offer other than disk space on a server for staging. http://ascii.textfiles.com/archives/4695 (previous link: http://as

Manuals Plus preservation efforts update

In Realtime: We are barely halfway done http://ascii.textfiles.com/archives/4711 They are still looking for volunteers tomorrow (Tuesday, August 18). Anyone in or near Baltimore might want to go help.

Re: Unusual stuff inside computers

On Sat, 1 Aug 2015, drlegendre . wrote: On Sat, Aug 1, 2015 at 6:05 PM, Vlad Stamate wrote: I recently got a very nice HP 9816 with a 9121 drive unit from Earl Baugh (thanks Earl!). The computer worked fine but the primary drive of the 9121 refused to read the disk and made a continuous beati

Re: Unusual stuff inside computers

On Sat, 1 Aug 2015, Vlad Stamate wrote: Hi, I recently got a very nice HP 9816 with a 9121 drive unit from Earl Baugh (thanks Earl!). The computer worked fine but the primary drive of the 9121 refused to read the disk and made a continuous beating noise. After I cleaned it on the outside I o

Re: This Hobby Is Actually Useful!

On Sat, 1 Aug 2015, Robert Jarratt wrote: PS A related question. I struggled somewhat with the Weller Magnastat No. 8 tip, when trying to solder leads to the ground plane, I could not get the solder to stay molten very long. I was using lead-free solder, its melting point is much lower than th

Re: Reforming capacitors (technical description, not politics)

On Wed, 29 Jul 2015, Charles Dickman wrote: On Wed, Jul 29, 2015 at 3:34 AM, Eric Smith wrote: Some people seem to think that "reforming" an aluminum electrolytic capacitor is some kind of cheat, akin to zapping NiCd cells or rejuvenating CRTs. Actually reforming is the same electrochemical

Re: Reforming capacitors (technical description, not politics)

On Wed, 29 Jul 2015, drlegendre . wrote: On Wed, Jul 29, 2015 at 5:19 PM, Fred Cisin wrote: On Wed, 29 Jul 2015, drlegendre . wrote: Incidentally, what exactly differentiates a computer-grade cap from any other alum. electrolytic? Maybe computer-grade don't need gold-plated oxygen-free lead

Re: H960 blank panel clips

On Tue, 28 Jul 2015, Pete Turnbull wrote: On 27/07/2015 23:13, Tothwolf wrote: On Mon, 27 Jul 2015, John Wilson wrote: The only thing here is, it's a *terrible* design. Those damn nubs snap off so easily (I'm sure decades of outgassing haven't helped), even when you'

Re: H960 blank panel clips

On Mon, 27 Jul 2015, John Wilson wrote: On Mon, Jul 27, 2015 at 11:58:36AM -0400, Noel Chiappa wrote: Saw this auction for a pair of H960 blank front panel clips: http://www.ebay.com/itm/391207099375 and though I'd pick them up... until they went for $30 (including shipping),at which point

Re: Chromatics on ebay

On Fri, 24 Jul 2015, William Donzelli wrote: Sounds like you are doing much better than me. Power Seller Master Race. Pfft...Nintendo forever! ;P Just a former Power Seller here...and all I got was this lousy mug and certificate.

Re: Chromatics on ebay

On Fri, 24 Jul 2015, William Donzelli wrote: Within the last year or so, eBay removed the ability to report a "non-selling seller". The only way to report a seller for this now (so they get a "strike" on their account) is to pick up the phone and call eBay. You have to ask (demand) to speak to

Re: Chromatics on ebay

On Thu, 23 Jul 2015, William Donzelli wrote: That's just seller's remorse. It's obviously up to you, but I'd have strongly considered disputing it with eBay as a seller refusing to honor the auction results is every bit as bad (or even worse) than a buyer refusing to honor the auction result

Re: PDP 11 gear finally moved

On Wed, 22 Jul 2015, Chuck Guzis wrote: On 07/22/2015 10:09 PM, Tothwolf wrote: One example I can give are some Pentium P55C architecture (Socket 7) systems which I've been running with minimal downtime for ~15 years. The original power supplies with their original (and relativel

Re: PDP 11 gear finally moved

On Tue, 21 Jul 2015, Lyle Bickley wrote: On Mon, 20 Jul 2015 23:14:36 -0600 Eric Smith wrote: On Mon, Jul 20, 2015 at 4:46 PM, Rich Alderson wrote: industry white papers with tables of decay rates for the aluminum electrolytics that indicate that, *no matter what*, they lose capacitance ov

RE: PDP 11 gear finally moved

On Wed, 22 Jul 2015, tony duell wrote: On Wed, 22 Jul 2015, Noel Chiappa wrote: I am way out of my knowledge range in this discussion, but here's something I wanted to ask about: how do you reconcile this observation (assertion?) with the observations from several people (e.g. the PDP-1 peopl

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