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by KV4CN

I have the following PDP-8/a components.I do not know their operating condition so they are being offered as is.I have had them for several years, but I do not have the time to see if I can get a system running.I would like to give them away as a lot and do not want to ship.I can send photos on request.I live in Winterville, North Carolina (eastern part of the state).Thanks, Dave _PDP-8/a chassis with the following boards__:_ (a) Hex Omnibus CPU M8315, (b) 8/A Internal Option MD317(?), (c) Option Board 1 M8316, (d) Data Ram DR-118A 8Kx12, and (e) Core Memory Stack H-219A. Chassis has the power supply.with G8018 regulator board. _Loose parts and boards:_ DEC Console Panel 00KC8-AA, 2 DEC console panels with limited function board, DEC H-219A, M8316 (has label that says may be defective), Dataram DR-118A, and M8316/M340566. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

3 years

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Re: Shop cleaning, few items that needs a new home

by Michael Glaser

I'm in Kent and I'm interested in the Tandy and Kaypro stuff. Looking for a Coco 3 but let me know what you have. Thanks, Michael Gee.

3 years

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DEC H7868 Power Supplies

by Douglas Taylor

While cleaning up I found a box with 3 H7868 power supplies. Once upon a time I had a BA213 and BA215 Vax. One of them has a cable coming out the top of it and probably went to the BA213 box which had only one power supply. The other two are plain and likely are from a BA215 box. I assume they are not working and if you want one or all I will ship if you pay postage. I am located in Zip 20640, shipping out of the US seems not worth the trouble. Doug

3 years

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Shop cleaning, few items that needs a new home

by Jerry Wright

Here is a few systems that need to go. Phase IV systems. comes in 3 Chassis Enclosures. lots of blinking lights and switches .these are a little odd, they have the video memory for the terminals on the computer itself.There are no disks, terminals or tape drivers. has not been turned on. Free to a good home. Dec Writer II very good condition, very little yellowing. Works 300.00 Dec Writer III also in very good condition with very little Yellowing Works 300.00 HP 85 in original box, some manuals and tapes. Has a rom drawer with basic IO rom16 Meg Memory drawer. 2 Tapes, Visicalc and Standard Pac ?? Original manuals for The 85 and Visicalc. Looks almost new with no fading. Box is Ok but wont handle shipping. Has not been turned on in years. 500.00 Dec Application Dec 400XP Tower PC server. This is a Desk side PC Server with Interactive Unix unlimited on it. Has 4 Dec SCSI drives. Tape Drive, Second SCSI cardand Satellite interface. Is missing the side Panel. Has not been run in a few years. comes with a spare drives and some boards. Intel 486 DX 50. 100.00 HP 9000 380 System. This was a donation from HP to a local College. Comes in 4 Desk side Chassis. 2 hold Large Hard drives. There is a SCSI Disk enclosure with drives. This was most likely the best they had in the day. Was holding what looked like a complete working HPUX system. Email, Gofer where all intact. . Condition is very good. Has not been turned on in a few years. Was backed up to 4mm tape at one point. 1000.00 Motorola Development system. 68k Was told it was a complete system. comes in 2 large boxes. Don't know much about this, does have Pods and a large Computer type interfaceHas not been turned on. 100.00 HP 7070E Tape drive. still loads a tape, but has not been tested further. Good conditionThis is a large floor standing tape drive with HPIB interface. 300.00 I also have a large Tandy/Radio Shack Collection that needs thinning. Most models. Alongwith 14 Kaypros Most models. These are located in Kent, Washington. No Shipping unless you want to arrange it. I canhaul it locally . - Jerryg-wright(a)att.net

3 years

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Advice on Repairing a HP1630G Logic Analyser

by Rob Jarratt

I have a nice HP1630G logic analyser. It still works OK but has a number of issues that I would like to fix. First, I managed to break the power switch. It became stiff and wouldn't readily toggle the power. I think the shaft became bent. In pressing too hard, I broke off the button on the end of the shaft. Looking at it, I think the button may have been glued onto the end of the shaft, possibly in a previous repair. There are some sites that list the button as available so I am trying to source an original, but I think it could be just the button and not the shaft that goes with it. However, if that proves impractical or too expensive, I am wondering if it is possible to source a new switch, with a long shaft to reach the switch on the board, that would at least allow me to toggle power from the front panel? I am not sure what to search for though, any suggestions? I have several possible workarounds: 1) just leave the switch on permanently and "toggle" the power just by plugging into the mains 2) try to glue the button back on, possibly with a metal pin for strength, but I think there is a bend in the shaft that caused the action not to work well and so this may not work well 3) Raid a spare from a HP1630D that I also have. 4) try to make a new shaft and switch, possibly 3D printed, or just use a piece of wooden dowelling. Any comments on these approaches? The other problem I have is that I get terrible switch bounce from the front panel keyboard. I have removed the keyboard to see if I can get at the switches and see if cleaning them would help. However, the keys (made by Cherry) look like sealed units to me. Again, does anyone have any advice on how to improve the performance of these switches? I could again raid my HP1630D for a spare (which has a keyboard that isn't as bad), but would rather not have to do so. Finally, I get a bit of screen wobble on the display. I am going to check all the capacitors on the display board, but any other suggestions? Pictures of the broken switch and the keyboard are here: https://1drv.ms/u/s!AgETuZFainX8gZNMqek10fyE3n1rlw?e=xd7RWU Regards Rob

3 years

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TU58 troubleshooting

by Chris Zach

So I'm working on repairing a TU58 Dectape II drive. So far I have cleaned it up, replaced the rollers, put new bands in some TU58 carts, and have fixed the power supply so +5 and +12 are up and running. Turning on the unit with nothing in it results in a quick flash of light from the LED on the main board. Hooking it up to an 11/23+ and trying to boot off it gives me ERR 12 NON-EXISTENT CONTROLLER Drat. It's connected to the 11/23+ with a normal 10 pin ribbon cable with keys at both ends. So questions: Baud rates are wired in at 9600/9600 on both the unit and the CPU. 1) Is the quick flash on the inside LED normal when powered up 2) Does it require something more than a simple ribbon cable to connect to the CPU? 3) Should the unit do something else with a tape in and powered on? Thanks! Chris

3 years

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"Revival" of a dedicated Micropolis webpage on internet

by P Gebhardt

Hello list, by coincidence, I came across this website: https://www.micropolis.com/ It seems to have been set up by a former employee of Micropolis with information about Micropolis products done until the late 90s. Cheers, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de

3 years

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HP-86 system available

by Stephen Pereira

Good afternoon folks, I have an HP-86 system that I am not using, and I would like to sell to someone who will put it to good use. The system is made up of: - HP-86B - HP-9121 Dual 3.5” floppy disk drive - HP-82900A Auxiliary Processor (CP/M System) with the proper boot disk - the new HP85Disk for virtual disk drives if you don’t want to use real floppies, or to use along with real floppies - HP-82929 Programmable ROM Module - An 87-EMS ROM, never installed - HP-82936A ROM Drawer, with a few HP-85 ROMs in it Sorry, but I will be keeping my CRT monitor. To be sure, I invested a pile of $$ into this over the years, but as I said, I’m just not using it any more, and I hate to see this good stuff going unused. I’d like to get $400 for the whole kit-and-kaboodle. I’d also like to work with someone who can pick it up, or we can meet half way in between. I’d really prefer not to go through all the expense and hassle of shipping. Please let me know if you’re interested and whatever questions you may have. smp - - - Stephen Pereira Bedford, NH 03110 KB1SXE

3 years

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UK members: Mushroom Components

by Wouter de Waal

Hi all I have before obtained obsolete 8-bit chips from Paul at mushroom.co.uk. But now my emails are not answered and their phone also doesn't seem to work. Does anyone know what happened and whether they're still around, or whether someone else took over their stock? Thanks W

3 years

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Re: Wang bar napkin story [WAS:RE: Re: "Revival" of a dedicated Micropolis webpage on internet]

by Ali

>I seriously considered getting some custom >napkins printed up (bars >sometimes have personalized napkins; 5.25" is >available, although these >days, bars usually use smaller, just to keep from >making rings on the >tables), with just the outline of a 5.25" disk jacket >printed on them >(perimeter, write enable notch, index hole, and >oval access slot), and a >version of the story, IFF it could be confirmed on >the backFred,You should just do it and add a teeny tiny disclaimer at the bottom regarding the veracity of the story. It. Would make for a great gag gift! Or if you want to get real fancy have a qr code that can be scanned on each napkin for a site with more detailed discussion of the events.-Ali

3 years, 1 month

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