Re: Boards stripped from MRI available

ICBW, but I think Imatron parts indicates this is x-ray/ct/electron beam, not MRI. > On Jul 21, 2017, at 1:49 PM, Jay West via cctalk > wrote: > > Some guy contacted me saying he had pulled all the boards from an MRI > machine that had a problem with the moving bed. Hr > > > > He gave m

RE: 5.24-inch FDD invention [was RE: Diskette size]

Jobs had nothing to do with the invention of the 5.25" FDD: The original impetus for a smaller less expensive FD came from Lanier via Jimmy Adkisson in mid 1975 By early 1976 the Shugart Associate's engineers were working on a medium and device based upon the size of the cassette tape drive C

Tandy Technical Reference Manuals

I have several Tandy TRMs that apparently are not yet posted on-line. I just scanned in the 4000 TRM and will upload it to the tvdog archive today. Will take a few weeks to get the rest in. But in the meantime, if there are any requests, I can reshuffle the order: Tandy 2000 Service Manual (TR

Re: Diskette size

On 07/21/2017 12:19 PM, Paul Koning wrote: > Interesting. Another example, slightly later, is the audio unit of the PLATO > IV terminal (1974 or thereabouts). It uses a rather large disk, perhaps 10 > inches diameter, brown oxide, no grooves. It's a random access device, with > 128 tracks.

Re: Wang 2200 system for sale in St. Louis, Mo.

On 7/21/2017 12:41 PM, jim stephens via cctalk wrote: Passing this along to the list. This looks like a very nice system. Via Steve Stengel. Craigslist listing says it is @ an American Legion post. Looks to be in north county, American Legion Post 444 on Old Jamestown Road. https://stl

RE: Wang 2200 system for sale in St. Louis, Mo.

Jim wrote... -- Passing this along to the list. This looks like a very nice system. Via Steve Stengel. Craigslist listing says it is @ an American Legion post. Looks to be in north county, American Legion Post 444 on Old Jamestown Road. https://stlouis.craigslist.org/for/d/wang-vintage-

Re: Diskette size

> On Jul 21, 2017, at 3:42 PM, Fred Cisin via cctalk > wrote: > > On Fri, 21 Jul 2017, Paul Koning via cctalk wrote: >> Interesting. Another example, slightly later, is the audio unit of the >> PLATO IV terminal (1974 or thereabouts). It uses a rather large disk, >> perhaps 10 inches diamet

Re: Diskette size

On Fri, 21 Jul 2017, Paul Koning via cctalk wrote: Interesting. Another example, slightly later, is the audio unit of the PLATO IV terminal (1974 or thereabouts). It uses a rather large disk, perhaps 10 inches diameter, brown oxide, no grooves. It's a random access device, with 128 tracks.

Wang 2200 system for sale in St. Louis, Mo.

Passing this along to the list. This looks like a very nice system. Via Steve Stengel. Craigslist listing says it is @ an American Legion post. Looks to be in north county, American Legion Post 444 on Old Jamestown Road. https://stlouis.craigslist.org/for/d/wang-vintage-computer/622495135

Yet More Equipment Available - Codex 6745/PDP11/IBMS1??

I got the following email, not sure what to make of it.. I just happen to have a PDP11 you might be interested in It is a Codex 6745 I have 4 work stations the processor and the server I also have an IBM series one complete with all of the log books that go with it ,a beautiful larg

Re: Diskette size

> On Jul 21, 2017, at 2:30 PM, Chuck Guzis via cctalk > wrote: > > On 07/21/2017 10:37 AM, Adrian Graham via cctalk wrote: > >> I have a Facit9911 2 11/16” (or 70mm in new money) microfloppy drive with a >> mahoosive interface module which google turns up precisely nothing about. >> I’m pret

Re: Diskette size (was: Repurposed Art (ahem...)

On Fri, 21 Jul 2017, Sam O'nella wrote: Extremely interesting Fred. I hadn't heard of half of those experimental disk sizes. ??Are those stories from your experience or from that article? (Yes I'll rtfm shortly). Definitely my experiences and presence in the business at the time, NOT from art

Equipment Available - Russian

So Mihail contacted me and he wants to get rid of (sell) 3 old Russian computers with documentation. Pictures at: https://drive.google.com/open?id=0ByRamH3wFb6SYU1kclZQNWxkQUU If anyone is interested, contact me off-list and I'll put you in touch with the owner. Best, J

Re: early (pre-1971) edge-triggered D flip-flop ICs

On 7/21/2017 8:12 AM, Vincent Slyngstad via cctalk wrote: From: Ethan Dicks: Thursday, July 20, 2017 11:08 AM On Thu, Jul 20, 2017 at 11:35 AM, Norman Jaffe via cctech wrote: Or, in today's dollars - $58. Ouch. Wow! That's many dollars per flip and or flop! If that lasted any time at all,

Boards stripped from MRI available

Some guy contacted me saying he had pulled all the boards from an MRI machine that had a problem with the moving bed. Hr He gave me an excel spreadsheet of what appeared to be AD/DA stuff branded IMATRON, Dec boards (M8043, M8044DF, M8186), Distributed Logic MQ759 controller, some Computer

Re: Diskette size

On Fri, Jul 21, 2017 at 7:30 PM, Chuck Guzis via cctalk wrote: > Even before flexible magnetic disks were used to record digital > information, they found use in audio equipment. E.g. the Telefunken DT-600: > > http://vintage-technics.ru/Eng-Telefunken_600.htm Off-topic, but I have the desktop

More equipment available (switzerland)

Thought I posted this one here previously, but apparently not. Some form of Micro-11 PDP box. Media for RSX A bunch of handbooks All located in Switzerland Pics at www.ezwind.net/micropdp11 Contact me off-list if interested J

Re: Diskette size

On 07/21/2017 10:37 AM, Adrian Graham via cctalk wrote: > I have a Facit9911 2 11/16” (or 70mm in new money) microfloppy drive with a > mahoosive interface module which google turns up precisely nothing about. I’m > pretty sure I’ve mentioned it here before but even a search of the archive > tu

Equipment Available

I was contacted by an ex-ATT tech that was DEC-trained to maintain a bunch of dec hardware that ATT used at the time. His house became the storage facility for the spares, plus all the dec class documentation, schematics, etc. Since he was the repair facility, all the equipment/parts were working b

Re: Diskette size (was: Repurposed Art (ahem...)

> On 21 Jul 2017, at 11:46, Liam Proven via cctalk > wrote: > > I was aware of Twiggy disks, Hitachi 3" as used in Amstrad and Tatung, > and of one that I think Fred _didn't_ mention: the 2" 720 kB diskettes > used in the Zenith Minisport: > > http://oldcomputers.net/zenith-minisport.html > >

Re: Run/Stop switch from a Soviet S/370 clone

On 24 May 2017 at 10:25, Pontus Pihlgren wrote: > I think so. It would at least be nice to see a picture. > > If it's smallish I might even pay postage for it :D OK, I've taken some photos and listed it. Mine is a UK eBay account so prices are in GBP. Opening bid is one penny. P&P is an estimate

Re: Repurposed Art (ahem...)

> From: Liam Proven > I confess to much trepidation at the hate for keyboard collectors, as I > am one. > ... > We're not _all_ evil, you know. Unfortunately, the percentage who _are_ willing to chop up original machines, leaving them non-functional (as in this case), is suffi

Re: early (pre-1971) edge-triggered D flip-flop ICs

> On Jul 21, 2017, at 10:12 AM, Vincent Slyngstad via cctalk > wrote: > > From: Ethan Dicks: Thursday, July 20, 2017 11:08 AM >> On Thu, Jul 20, 2017 at 11:35 AM, Norman Jaffe via cctech >> wrote: >>> Or, in today's dollars - $58. Ouch. >> Wow! That's many dollars per flip and or flop! > > I

Re: early (pre-1971) edge-triggered D flip-flop ICs

From: Ethan Dicks: Thursday, July 20, 2017 11:08 AM On Thu, Jul 20, 2017 at 11:35 AM, Norman Jaffe via cctech wrote: Or, in today's dollars - $58. Ouch. Wow! That's many dollars per flip and or flop! If that lasted any time at all, one can see the rationale behind things like DEC's Posibu

Re: Diskette size (was: Repurposed Art (ahem...)

On 21 July 2017 at 07:03, Sam O'nella via cctalk wrote: > Extremely interesting Fred. I hadn't heard of half of those experimental disk > sizes. Are those stories from your experience or from that article? (Yes > I'll rtfm shortly). > The only odd one i have is a backup cartridge? that resemble

Re: early (pre-1971) edge-triggered D flip-flop ICs

" In final use, the parts had power applied for no more then an hour." ...and then something goes boom??? Marc On Thu, Jul 20, 2017 at 9:19 AM, Pete Lancashire via cctalk < cctalk@classiccmp.org> wrote: > In 1978 the place I worked the cost per SSI/MSI TTL 38510 device was > between $100 and $2

Re: early (pre-1971) edge-triggered D flip-flop ICs

That's a lot cheaper than the first logic ICs I remember, the Fairchild µL series RTL logic ICs. Two 2-input NOR gates, or a single JK flop, or 4? inverters per package. 10-wire transistor cans. paul > On Jul 20, 2017, at 11:35 AM, Norman Jaffe via cctech > wrote: > > Or, in today'

Re: early (pre-1971) edge-triggered D flip-flop ICs

On Thu, Jul 20, 2017 at 11:35 AM, Norman Jaffe via cctech wrote: > Or, in today's dollars - $58. Ouch. Wow! That's many dollars per flip and or flop! > On Wed, Jul 19, 2017 at 11:29 PM, Ethan Dicks wrote: >> I have no datasheet, but I have examples on DEC M-series FLIP-CHIP >> modules from my