The case of 1858-0014 is solved (on the way to me thx to ). Regard the tape transport again - I've made "MOTOR CONTROL A64 TEST PROCEDURE" so far ftp://computermuseum.informatik.uni-stuttgart.de/hp/98

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Hi Anders, It should be connected with the pcb, the psu housing and screen shield should be connected with earth to suppress EMI and safety. The PCB has 3 solder points for the power inlet the middle

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I just have written the following message for the HP Caculator Museum's forum, but I think it might even fit better here, since this group is dedicated to the bigger machines ( series 200/300). BASIC

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-On Wed, May 15, 2019 at 4:16 PM Stephen Hanselman <kc4sw.io@...> wrote: There is already a scan of one version of the A-Series CE Handbook available here: A-Series Computer Systems CE Handbook

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I'm in the process of restoring an HP C1700C Model 20C Optical Disk library and need to get replacement toothed belts as they have perished and fallen apart. The HP Part numbers are C1700-60034 (inclu

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There is when running RMB. On the IFT keyboard, i think it’s the top left key in the group above the numeric keypad. This doesn’t work under HP-UX but maybe there is a unix command to recall previousl

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hi Martin, group, Does anyone know: Could this CPU speed up be done on the HP R/332 Controller ? thank you, r ** Martin Trusler 08/10/19 #1991 08/10/19 #1991 I have now experimented with upgrading the

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A few minutes after booting my 9836C, it doesn't recognize any external HPIB drive any more. Obviously the HP-IB circuitry is faulty (temperature dependend). Is the service manual for this machine ava

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Hello, This is my first post here and I am new to Groups.io. I have attempted to search for a solution here before asking a stupid question. I have an HP-150 with a 9121 Dual Floppy Drive which is wor

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I received this email at the HPmuseum.net site today - if anyone is interested in a 260, please contact Harald directly. Hi I have some old HP 260 from about 1985 . I guess best thing to do is just to

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Here is what I posted on cctech, two weeks ago, with almost no interest shown. Hope, here, this could be of interest for someone. I hate to trash Vintage HP computers :-(( All boards are corroded, fro

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8k basic which can run in 8k core memory. You'll also need to install the appropriate SIO drivers for the teletype and io. The 2114/16 pocket guide should help you further. -Rik

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I came across this small HP-HIL keyboard from Develin Ltd / UK. Unfortunately they use a very short "E"-"E" cable instead of the ususal "A"-"E", so I have to make a longer cable with SDL connectors to

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Hi all I recently got a 9815A on eBay and it was working except that some of the keys were sticky. So I disassembled the keyboard (there are a LOT of little screws in there...) and cleaned all the key

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Looking for informations about vintage circuits uPD135, uPD106, uPD102 made by Hitachi or NEC. Circuits are in dual-in-line packages, maybe TTL (not sure). Thank you for any suggestion.

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Points well made. I remember that I did have an Eprom programmer that worked with the 2708 chips and that I did read out some chips back in about 1982. The programmer was attached to the parallel port

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Hello HP1000 A-Series Experts With the help of J. David Bryan I got the Ada/1000 Environment (PN 92125A Rev 5003) on my 6.21 System running (A990, 16MB RAM, 2.3GB SCSI HDD). But I am missing the Manua

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Hello - Is anyone interested in having a model 98547A high-resolution video board for spare parts or for repair? This board used Topcat processors for 1024x768 resolution and 8-bit color depth. Unfort

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hi all, I would like to make a RAM expansion memory card for my HP-150A which have just 256K. To make a simple circuit, I would to use a static RAM. PAL 16L8 (HP part # 1820-3420) source code would be

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I just ordered new filter caps as well as a new 2N4398. I'll let you know if that fixes things or if I need any more help. I'll make sure to test it safely this time. Rik, is your crowbar circuit avai

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