test-drb

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101090 discussions

by tshoppa＠wmata.com

Personally I enjoy a big Simpson 260-dash-whatever. The Triplett 630 is in the same league. Both have been in production (in one variant or another) since before WWII. The RCA Senior Voltohmysts I love for their fashion sense but unless I need VTVM class input impedances, I'd prefer the Simpson or Triplett. In terms of used Flukes, I highly recommend any used 77-series unit. You can critique the designs because of what you saw as failings of your Fluke 85, but believe me, the LCD display on any Fluke LCD DMM will be far more durable than the faceplate on my Simpson 260 or Triplett 630. At the very low end, in the $3 to $5 range there are "disposable" DMM's available at discount stores here in the US. They are not a joy to use but they do mostly work. Tim.

15 years, 7 months

Turbo Pascal floppies

by charlesmorris800＠centurytel.net

I have a set of six 5.25" floppies containing "Borland Turbo Pascal for Windows 1.5". Please contact me off-list if interested. thanks Charles

15 years, 7 months

How to prevent yellowing of equipment on display

by mardy＠voysys.com

I know that there has been a tremendous amount of talk about removing yellowing from vintage equipment, but going forward, does anyone have any suggestions for helping prevent yellowing of equipment on display, short of keeping them in a dark cave? I have a couple of Apple II's that are in excellent condition with minimal yellowing and would like to put them on display without having to worry about damage to the plastic. -Mardy

15 years, 7 months

Stupid egg tricks was Re: Multimeter recomendations

by db＠db.net

On Wed, Sep 22, 2010 at 11:53:45AM -0500, John Foust wrote: > At 11:09 AM 9/22/2010, Dave McGuire wrote: > > Umm, yeah, I suppose, but...for what purpose? Eggsperimentation? > > > Decorations? Magic tricks? Cascarones? Easter eggs. And not the software kind. > > - John - Diane -- - db at FreeBSD.org db at db.net http://www.db.net/~db

15 years, 7 months

Multimeter recomendations

by wbblair3＠yahoo.com

> > When is the demo on how to suck eggs? > > Too dangerous due to risk of choking, lacerations from > broken shells, salmonella etc. etc. And if you're in a combat zone, perhaps you'd get a Purple Heart. True story as related in Reader's Digest Humor in Uniform section: An Army cook in Vietnam got an egg shell fragment in his eye while making scrambled eggs. The albumin stuck it to his eyeball so he had to see the unit medic to get it removed. Some time later, he was notified that he was receiving a Purple Heart. The reason cited was "shell fragment in eye." Apparently, someone was just glancing through through the undoubtedly numerous medical treatment records to discern who to present the medals to and found his record with its deceptive entry.

15 years, 7 months

Maker Faire

by evan＠snarc.net

MARCH's booth for Maker Faire this weekend will be indoors at the main venue (New York Hall of Science). Our maker # is 3641 if any cctalkers are looking for us. I'm told we will be inside a modern computer lab. Saturday night we'll be eating/drinking; all are welcome to join us.

15 years, 7 months

DiscFerret -- PCBs have arrived

by classiccmp＠philpem.me.uk

... Well, actually, they arrived at the beginning of last week and I didn't finish checking them against the netlist until today. My excuse is that my notes are all on Cougar (my laptop), which is currently refusing to boot without segfaulting in the kernel. Rather than deal with ASUS support, I replaced it -- the replacement (an MSI U230 named Ryoko) is far better behaved :) Scanned images: Top: http://www.discferret.com/images/discferret-pcb-top.jpg Bottom: http://www.discferret.com/images/discferret-pcb-bot.jpg They seem to have come out OK. The solder mask is a little discoloured around some of the thinner tracks, but that's a cosmetic issue. It still resists solder, thus it's OK :) For the pathologically curious: Substrate -- FR4 fiberglass, 1.6mm Track layers -- two copper, 1oz Layer stacking -- BOTTOM COPPER, FR4, TOP COPPER, TOP OVERLAY Surface finish -- looks like lead-free HASL or roller-tin. It's certainly not immersion tin or silver, the pads have roller marks on them. It turns out I hammed the entry of the order, and managed to order two sets of three boards, leaving me with six PCBs in total, and an additional 130 Euro bill. Ick. I'm still short of some parts (notably: the USB ESD suppressor chip, some pin headers, 7-pin SIL resistor packs and 10nF 0603 decoupling capacitors). A trip to the Farnell trade counter is being meticulously planned, as long as I can get someone to hang around the house and wait for my Rapid order to arrive (mouse microswitches... Logitech should be shot for using those nasty Omron things). Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

15 years, 7 months

Diablo 30 disks and failure

by mark.kahrs＠gmail.com

When I was maintaining Alto Is, I put a warning sign on the machines that stated "Avoid VD --- Venereal Disks! If your disk doesn't load, do NOT try another machine"... For the most part the drives were OK, but if they did fail, then the contagion could be spread. I certainly had my share of disk crashes. There's a reason the Alto file system had the scavanger and was designed to be recovered...

15 years, 7 months

microcornucipia magazine issues

by elazzerini＠interfree.it

15 years, 7 months

WTD: Clarion/JPI TopSpeed C (for Psion SIBO SDK)

by classiccmp＠philpem.me.uk

Hi guys, Pushing the boundaries of the Ten Year Rule here, but I think the "coolness factor" might apply here, so please don't get the pitchforks and flaming torches out just yet... :) I just got back from the Barnsley Hamfest, with a new toy in tow: a Psion Workabout MX, 2MB version, with IrDA, TTL, RS232 and LIF ports, a 256K flash SSD and a 1MB SRAM SSD. Batteries were -- predictably -- shot, but on installing a fresh pair of AAs, it booted to SIBO. Seems the SSDs are blank, and aside from a few small screen scratches the machine is in pretty good nick. Thing is, I'd like to see it do something useful. This dictates that I write some code for it... I've managed to find a copy of the old Psion Sibo SDK and some PDF documentation on an FTP site, but this doesn't include the C compiler required to compile the code: TopSpeed C. As near as I can tell, this was a 16-bit 8086 C compiler which generated code under (and for) MS-DOS type platforms. The Psion documentation references Topspeed Compiler v3.10 and Environment v3.10.002, but I suspect other versions may also work. Psion suggest it was released by Clarion, but every other reference I can find suggests it was sold be a company called "JPI". Does anyone happen to have a spare copy of Topspeed C kicking around? Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

15 years, 7 months

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