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101090 discussions

Distilled water (was re: Model 152 PSU dummy loads)

by cruff＠ruffspot.net

Just to be pedantic, as this is the Internet after all :-), distilled water is a pretty good insulator, but not a "perfect" one. Neutral (pH 7.0) water always has a very small amount of the molecules disassociated into H+ and OH- ions. However, as others have stated, the effective value of the water resistor, compared to the load resistor(s), will be negligible.

10 years, 6 months

FW: The last fix for a "All Shook Up" 33

by rdawson16＠hotmail.com

(pictures removed) From: rdawson16 at hotmail.com To: greenkeys at mailman.qth.net Subject: The last fix for a "All Shook Up" 33 Date: Mon, 26 Oct 2015 23:14:45 -0700 Wayne (ttyparts.com) and I had a disaster of a shipment on a ASR33, Fed Ex Ground did us no favors. In spite of a handcrafted wooden case, clearly marked UP arrows and FRAGILE, these guys tossed this thing around. The printer shipping bolts were installed. I told Wayne, are you sure you put them in? because I could not find them. There they were, in the bottom of the crate, sheared off. Obviously they dropped and tumbled his custom TTY wood crate, that he has used for years. HERE IS key is stuck, the printer rammed into the keyboard and bent it horizontal and vertical, fixed that. Wayne sent a test tape and we verify the printer is OK. Keys still do not print the correct letters, and tonight I find an actuator wire on the keyboard is broken. If anybody ships a TTY, I recommend this: Make the box a, 3x, 4x TTY sized double wall cardboard box, filled with peanuts, and the TTY nestled in the core of the surrounding peanut cushion. They are going to shake and drop it, and all that foam and peanut will give the printer a cushion and lower the G's the TTY and printer will experience. An 'UP ARROW' means nothing, nor does 'FRAGILE' Wayne's idea of a strong wood crate may have worked in the past, but today, it means 'don't care' this thing is packed for rough handling, they will toss it, drop it, tumble it because it is heavy as shit, and this wood case looks like it is built for this abuse. Wayne is a super guy, and I highly recommend anybody buying teletypes work thru him. he completely redid my machine, took it down for a total refurbrishment, and built it back up. Weeks of testing and alighnment too. This guy is the best - and I can attest to this on all the time he has spent recovering from the shipping guys to get me online Randy KF7CJW

10 years, 6 months

HP Vectra stuff

by auringer＠tds.net

All, Also while cleaning I found a box of HP Vectra docs & a couple disks. Docs: Getting Started With the HP BASIC Controller HP 24540B & HP 24541B - Installation Guide 35743 HP Enhanced Graphics Display Installation Guide HP Enhanced Graphics Adapter User's Manual Disks: VECTRA PC UTILITIES AND DRIVERS ENHANCED GRAPHICS ADAPTER - UTILITY DISC All of this in a HP 82301A BASIC Language box. Again, beer money & shipping from 53714. -Jon

10 years, 6 months

SCO Integra

by auringer＠tds.net

Hi All, I ran across the following while cleaning: A set of "draft" manuals for SCO Integra database software. It looks to be a complete manual set in 4 hardbound volumes. Also in the pile are 4 sequentially labeled 5 1/4" floppy disks that have "Dewitt" written on them. I don't have the resources to check the contents of the disks. There is a single page color promotional flyer for SCO Integra. Are these of interest to anyone? Here's a picture: https://www.flickr.com/photos/jja572/albums/72157660431177871 Available for beer money and shipping from 53714. -Jon

10 years, 6 months

Mac IIsi - SoG?

by jules.richardson99＠gmail.com

Can anyone confirm whether a Mac IIsi spits out sync-on-green (and only sync-on-green) or not? I've found mixed info on the 'net so far. I've got a system here which makes encouraging startup noises, but isn't outputting any video to a VGA screen (adapter cable OK with my other Macs). If it's SoG-only, well, there's my problem :-) If it does output h/vsync like my other Macs then I need to look elsewhere (most likely nonsense NVRAM settings, I expect). cheers Jules

10 years, 6 months

The last fix for a "All Shook Up" 33

by jnc＠mercury.lcs.mit.edu

> From: Guy Sotomayor > Peanuts do *nothing* .. The heavy item will "settle" and have nothing > surrounding it. The peanuts act a fluid during shipping. I can attest to this. I bought a largish disk drive, and it was shipped in peanuts. It came out the box at 45 degrees to the sides - it had gone in parallel to the sides. Luckily, no damage ensued, but it was pure luck. Noel

10 years, 6 months

Order now ! PDP8 front panels

by rodsmallwood52＠btinternet.com

Hi Guys OK I'm open for orders for the choice of the following: PDP-8/e (Type A) PDP-8/e (Type B) PDP-8/f PDP-8/m Existing orders price as pre-paid New orders price will be advised based on batch sizes /f and /m are going to be a few dollars more as they need an extra screen for the logos. There are_twenty slots_ of which _five_ have already gone Ask for the file of designs if you don't have it. New panels in design stage for the 11/40 up to 11/70. Scans, Photos and "I want one" for the above to me please. Rod Smallwood

10 years, 6 months

Trying to get my RLV11 working

by ben＠bensinclair.com

I'm trying to get my RLV11 working to eventually run my RL02, and am having some trouble. I have a PDP-11/23 in an H9273 backplane. I just got it working reliably without the RLV11 boards installed, so now I'm giving them a try again. Here's my configuration: Down the left side: M8186, M8044, M8044, M8043, M8013, M8014, and M8012 (the BDV11) on the bottom. I don't have the drive connected and am just trying to run the VRLAC0 controller test, which I believe should work without any drives connected. The switches on M8014 are configured to the defaults, according to: http://bitsavers.trailing-edge.com/pdf/dec/qbus/EK-RLV11-TD-001_RLV11_Contr… That would be a vector address of 330 and a base address of 174400. Unfortunately, VRLAC0 doesn't look like it can see anything, but I'm not sure I'm reading its output correctly. What follows is the VRLAC0 output. I also looked at 17440 myself and get 005737, though I'm not sure what it should be. This is new territory for me, so any help would be welcome. Thanks! .R VRLAC0 VRLAC0.BIN DRSSM-G2 CVRLA-C-0 CVRLAC RLV11 RL01 DSKLESS DIAGNOSTIC UNIT IS RLV11 RSTRT ADR 145702 DR>START CHANGE HW (L) ? Y # UNITS (D) ? 1 UNIT 0 11/23 PROCESSOR (L) Y ? BUS ADDRESS (O) 174400 ? VECTOR (O) 160 ? 330 DRIVE (O) 0 ? BR LEVEL (O) 5 ? CHANGE SW (L) ? Y DROP ON ERROR LIMIT (L) N ? AUTOSIZE (L) N ? CVRLA SYS FTL ERR 00000 ON UNIT 00 TST 001 SUB 000 PC: 017066 CAN NOT ADDRESS RLCS CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00001 ON UNIT 00 TST 002 SUB 000 PC: 017164 CAN NOT ADDRESS RLBA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00002 ON UNIT 00 TST 003 SUB 000 PC: 017262 CAN NOT ADDRESS RLDA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00003 ON UNIT 00 TST 004 SUB 000 PC: 017360 CAN NOT ADDRESS RLMP CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00100 ON UNIT 00 TST 005 SUB 000 PC: 017454 CAN NOT ADDRESS RLCS CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00101 ON UNIT 00 TST 006 SUB 000 PC: 017550 CAN NOT ADDRESS RLBA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00102 ON UNIT 00 TST 007 SUB 000 PC: 017644 CAN NOT ADDRESS RLDA CONTROLLER: 174400 DRIVE: 0 CVRLA SYS FTL ERR 00103 ON UNIT 00 TST 008 SUB 000 PC: 017740 CAN NOT ADDRESS RLMP CONTROLLER: 174400 DRIVE: 0 ILL INTER 004 PC 017770 PS 000341 ILL INTER 004 PC 014460 PS 000005 DR> -- Ben Sinclair ben at bensinclair.com

10 years, 6 months

Oddball question: really small terminals

by tmfdmike＠gmail.com

For reasons too abstruse to explain in detail I'm on the lookout for terminals that are, physically, really small - especially serial and coax 3270, and possibly twinax 5250. Yes you could do things with small laptops and PDAs with PCMCIA cards and adapters and software - I know a guy who kept a Psion Organizer configured especially for use as a terminal with SGI boxes. But that's Not The Same, and NOT what I'm after; I want dedicated purpose-built terminals; switch it on and It Works. And both DEC and IBM made 'real' terminals in a 'small pizza box' form factor, using a separate standard VGA monitor as a display; one could use those with a small LCD screen and achieve a similar result, and I might do just that - can anyone remember the model numbers of IBM 3270 and 5250 terminals that were built this way? But really I'd prefer a compact all-in one solution; a one-piece terminal. Any suggestions? I'm open to both LCDs and *small* CRTs. Preferably colour! Thanks Mike

10 years, 6 months

PDP 8 panels. Feedback

by rodsmallwood52＠btinternet.com

Hi Guys I need to get some comments on the following. 1. Would a matt finish be better than the current glossy one? 2. Should the round holes be pre-drilled? Regards Rod

10 years, 6 months

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