Re: OT: Female Computer
Am 10.01.17 um 09:08 schrieb Dave Wade: > Here they were ... > > http://farm4.static.flickr.com/3311/3214242023_ca5f2425a2_o.jpg See also: https://en.wikipedia.org/wiki/Harvard_Computers -- tschüß, Jochen
Re: HP Series-80 computers - PRM-85 board case? ... maybe!
Am 20.06.16 um 15:20 schrieb martin.heppe...@dlr.de: > So: if someone owning a 3D printer and a PRM-85 board is interested > in helping me to refine the design by making a test print I could > supply the STL files for upper and lower shells. I highly recommend to contact your local hackerspace: https://stratum0.org/wiki/Hauptseite They offer 3D printers for use: https://stratum0.org/wiki/3D-Drucker There you will find several people experienced with 3D printing and willing to help you. -- tschüß, Jochen
Re: Monitor refresh rate query
Am 17.06.16 um 17:36 schrieb Noel Chiappa: > The first couple of LCD's I plugged in, [...] > Finally I found one that _did_ give me the numbers, > and it said the retrace was 35.6 Khz / 44 Hz. [...] > So I finally found an old CRT monitor that worked - but now I have another > problem! It reports the video as being 35.6 Khz / 87 Hz! Sounds like an interlaced video mode. No surprise that the LCD can't do this. Interlaceing was common for 1024x768 XGA back in the days. -- tschüß, Jochen
Re: Building a PC - then & now
Am 14.01.16 um 11:09 schrieb Dave Wade: > I would say we have more freedom now than ever before. Perhaps Ghz > mother boards are beyond most people, but other than that there are > folks building every sort of computer, other than perhaps valve > machines. There is the MUNIAC: http://www.cray-cyber.org/hardware/Hardware.php Though, uncompleted. (IIRC they have the ALU mostly finished.) But still a "modern" design valve computer build by hobbyists. Some Geek-Porn: https://www.flickr.com/photos/stiefkind/43091224 https://commons.wikimedia.org/wiki/User:Okona http://www.cray-cyber.org/static/tours2004/LARGE/J_MUNIAC.jpg http://www.cray-cyber.org/static/tours2004/LARGE/J_MUNIC-Roehrenrechner.jpg -- tschüß, Jochen
Re: HP 1663A Logic Analyzer keyboard
Am 15.10.15 um 00:58 schrieb Ian Finder: > In fact I may need one for my HP 715. There are two variants of HP9000/715: The older versions like the 715/33 have HIL only. The newer like the 714/64 have HIL and PS/2. You _need_ that breakout box for the later to connect any keyboard or mouse. It is just a passive box with some cables and sockets. In that newer version of the machine the case opening for the HIL connector was used for the 10 pin connector to the breakout box. -- tschüß, Jochen
Re: TK50/TK70 Info
Am 28.08.15 um 06:39 schrieb Mark J. Blair: > I have very limited experience with this family of drives so far, but what > little I have is not good. Pictures: > > https://twitter.com/nf6x/status/617511461452013568 > > https://twitter.com/nf6x/status/617519989721923584 I had the exact same problem a few years ago. Tape sticks to head... I wanted to use 9 track instead of TK50, but those tapes where unreliable too. I finally gave up on tapes, any tape technology, as the media has deteriorated into uselessness. -- tschüß, Jochen
Re: DEC RX02-PA?
Am 10.08.15 um 00:06 schrieb Pete Turnbull: There's an official DEC mounting kit to mount 2 x RX33 where you'd normally find an RX50 in a BA23/BA123. It's basically two side plates, to hold the upper and lower drives together. I basically did this to mount two EDSI half height disks in my BA23 that holds my 11/23. The lower drive attaches to the BA(1)23 drive sled by the bottom screws. The upper drive attaches to the lower drive by a plate on the left and right side each. The two plates are the front bezels from dead MFM disks. I just drilled holes for the side screws into them. -- tschüß, Jochen
Re: This Hobby Is Actually Useful!
Am 01.08.15 um 23:24 schrieb Robert Jarratt: PS A related question. I struggled somewhat with the Weller Magnastat No. 8 tip, when trying to solder leads to the ground plane, I could not get the solder to stay molten very long. Wellers are notorious for this. I had to use various Weller irons at occasion. They all suffered from the same problem: To high thermal resistance between heater and tip. It is a pain to (de)solder to a ground plane, as the heat can't flow from the heater to the tip fast enough. I consider Wellers unusable for this reason. If you wane go with new soldering equipment I highly recommend Metcal, OKi MFR or Thermaltronics. (OKi bought Metcal and sells Metcal technology, Thermaltronics is a Chinese clone of the old Metcal systems after the patents expired. A Thermaltronics TMT-2000S is around £160 in the UK.) They use a unique inductive heating with Curie effect temperature regulation. I bought a OKi MFR and it is by _far_ the best soldering equipment I used ever. The iron is small and easy to handle, but is able to deliver lots of heat instantaneously if needed. p.s. As others noted: Stay away from lead free solder. It is harder to work with and the fumes from the flux aren't that healthy... -- tschüß, Jochen
Re: 54 TK50 tapes on eBay
Am 20.05.15 um 21:11 schrieb Johnny Billquist: Hmm. There might also be other issues when using a TZ30 as compared to a TK50 here... I don't even remember how the TZ30 looks inside. There might be rubber parts in there. No rubber. The tapes got stuck to the read-/write head. -- tschüß, Jochen
