test-drb June 2015

test-drb@ccmp.vtda.org

165 participants
285 discussions

by COURYHOUSE＠aol.com

ok added! thanks Mike! In a message dated 6/10/2015 2:24:01 P.M. US Mountain Standard Time, tmfdmike at gmail.com writes: I have one, restored, was running when stored but not powered up in some considerable time. Serial number unknown; IIRC correctly the tag with the serial number was missing so may remain unknown. Obtained from a collector called Erik in... Netherlands I think, circa 2004... who got it from John Bradatanu... IIRC I traded a TU56, a pdp-8/L, and some other bits, for the 8/S and a working VT05.. see pic on this page: http://www.corestore.org/coremove.htm Pics on that page are interesting, as it's the only time around 90% of the DEC portion of the Corestore collection has all been lined up and visible in the same place at the same time! Oh 8/m has been discussed in front panel talk... here's a nice pic of mine: http://www.corestore.org/pdp8m-1.jpg Mike On Thu, Jun 11, 2015 at 7:56 AM, Fred Cisin <cisin at xenosoft.com> wrote: >>> I know of 17 PDP-8/S systems, including four at the RICM. >> >> Not everyone wants their collections to be public information but: > > > If somebody were to try to make a "complete" list, it would make sense to > provide variable levels of anonymity, such as name but not contact info, > state but no name, email but no other contact, etc. If designed well, that > could be managed by a full information form in which it is easy, and > acknowledged to be acceptable, to fill in only items that are intended to be > public. > > Prob'ly some people would be more willing to discuss what they have IFF they > aren't opening themselves to theft risk, and/or a deluge of "I'd like to > buy". > > NOTE: I do not currently have ANY PDP stuff, so I am only speculating about > what others would like. > > > -- > Grumpy Ol' Fred cisin at xenosoft.com -- http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'

9 years, 6 months

Alpha 4100 CPU fan

by binarydinosaurs＠gmail.com

Folks, Trying to source a non-DEC fan for a 4100 CPU since getting them in the UK is more and more tricky as time goes on. The originals are 12V 0.17A 60mm 3-wire and I've found some almost-identical-but-not-quite 0.18A variants. Needed to rewire the plugs to match (12V, sense, gnd) but the machine reports 'CPU0 Fan Fail' despite the fact the fan is running at speed. Is +0.01A enough to make the monitor board think the fan's failed? Board itself is fine as it works with its existing fan. Cheers, -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk

9 years, 6 months

Front Panels - Shipping commences

by rodsmallwood52＠btinternet.com

Hi Guys I have started to ship 8/e front panels as of to-day. I took some to the shippers to-day and more will go to-morrow Everybody who placed an order will get at least one from the first batch. The next batch will be twenty panels. Type B will be available and both round holes will be cut by the plastics company Rod Smallwood

9 years, 6 months

Front Panel Update

by rodsmallwood52＠btinternet.com

Hi All Since I released the picture of the first 8/e panel on Friday there has been a big response. Its 12:45 local on Monday in the UK and I'm of to the silk screeners to collect the rest of the first batch and to arrange for more to be printed as soon as I get the blanks from the plastics supplier. I'll send out what I have to fullfill as many of the orders I have so far as I can. I have learned an awful lot just based on the inquires I have so far. I see the following as requirements 1. Full size reproductions of the original panels useing the same methods. 2. High quality 3. Custom one off service for important restorations. 4. There's more demand than I thought. 5. So far its all been for DEC systems And yes they would look good just hung on the wall Next up an accurate reproduction of the bezel. And after that a lamps and switches board when and if I solve the Stackpole switch levers issue. Please send in your orders so I can allocate production/shipping slots. Regards Rod Smallwood

9 years, 6 months

WTB /WTT DEC TZ30 and/or 1/2" open reel SCSI magtape drives

by nf6x＠nf6x.net

In order to be able to move data between my vintage and modern computers more effectively, I am looking for one or both of these items: 1) DEC TZ30 tape drive. This is a TK50-compatible drive in a 1/2 height form factor with a SCSI interface. 2) 1/2" open reel magtape drive with SCSI interface. Preferably with 6250 BPI capability. Doesn't need to be fast or fancy; just needs to be working-ish. I'm located in Riverside, California, USA. For an open reel magtape drive, a local source would be preferable to avoid the need to ship the beast. Or possibly in Las Vegas, where my folks might sneak it into the moving van later this month... :) eBay and I are now seeing other people, so I'm cut off from that source. Ditto for PayPal, so I'd pay by some other means (or maybe even trade). -- Mark J. Blair, NF6X <nf6x at nf6x.net> http://www.nf6x.net/

9 years, 6 months

equipment available

by jwest＠classiccmp.org

Lowboy rack, two RL0X drives and one 11/23. From the pictures it looks a bit dirty, but we know RL0X and 11/23's are pretty solid even after age. Location is Newbury, UK Email me off-list if interested. Best, J

9 years, 6 months

Wanted: stand for NeXT monitor

by tosteve＠yahoo.com

Just acquired a NeXT 68040 cube computer. It's way cool, but the responsiveness is unimpressive - I'd call it pokey. All 16 RAM slots are full for 16MB, but sixteen 4MB RAM sticks may help the speed. It has an internal HD, as well as the magneto-optical drive. One things it's missing is the monitor stand - does anyone have a spare stand for a NeXT N4000A monochrome monitor? Thanks- Steve.

9 years, 6 months

What is best place to buy new 1/2 tape ? (recent datecodes)

by COURYHOUSE＠aol.com

What is best place to buy new 1/2 tape ? (recent datecodes) thanks for advice Ed# _www.smecc.org_ (http://www.smecc.org)

9 years, 6 months

Blue tape retainers

by COURYHOUSE＠aol.com

They breathe better if you do not have them sealed when you are baking them..ed _www.smecc.org_ (http://www.smecc.org) (resent due to error message) -------- Original message -------- From: Chuck Guzis <cclist at sydex.com> Date: 06/09/2015 9:46 PM (GMT-07:00) To: General at classiccmp.org, "Discussion at classiccmp.org:On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: Blue tape retainers On 06/09/2015 08:21 PM, ben wrote: > Also would not a fall like that damage the tape reel? When baking tapes with the Wright Line seals, I've learned to remove the seals. If you leave them on, the tapes at 58C, will often just fall right out the seal--the coefficient of expansion is much larger for the seals than for the tape reels. After the seal has had a chance to cool off, it fits fine. This is particularly a problem with the smaller size reels. --Chuck

9 years, 6 months

PDP-12 Restoration at the RICM

by COURYHOUSE＠aol.com

Michael, David's product is outstanding! He also makes new foams for the inside also for the model 33 and 32 - Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 6/7/2015 6:58:55 A.M. US Mountain Standard Time, michael.99.thompson at gmail.com writes: W contacted David Tumey about Teletype hammers. He will send us some as a donation. We put some heat-shrink tubing on to stop further damage. Warren repaired and tested the M706 Teletype receiver. We put it back in the PDP-12 and put the borrowed M706 back in the PDP-8/I. The donor brought another M706/M707 pair, so we tested them and then installed them. We have two working serial ports in the PDP-12. Warren is making an Arduino based programmable baud rate generator for this system. We ran more diags. The 8/I Instruction Test #1 & #2, and the random JMP, JMP-JMS, ISZ tests work OK. The LINC Tape-Quickie test and the Memory Address test fail after running OK for a few minutes. We tested all of the G221 Memory Selectors, and they are OK, so the memory address decoding is probably working OK. This may be a case where the processor is sometimes doing the wrong thing when comparing numbers, and the rest of the hardware is actually OK. Debugging this will be the project for next week. The donor dropped off more documentation, spare parts, LINC tapes containing the DIAL operating system, and an RK05 disk pack that likely contains OS/8. We will make image copies of the LINC tapes and the disk pack. -- Michael Thompson

9 years, 6 months

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test-drb June 2015