Re: Motor generator

Very large machines, certainly. There were "site preparation" documents that detail this. I can quote from the 1975 edition of the STAR-100 hardware manual on bitsavers (PDF page 25): "Power for the basic computer consists of one 250 kva, 400 Hz motor generator set. The motor-generator set has

Re: Motor generator

One additional benefit was that an MG enables one to "coast" a bit through transient power glitches. That is, you'd see the lights flicker, but the machine stays up. Power failures in the bad old days could be very expensive. Old computers did not like being stopped suddenly and then restarted.

Re: Motor generator

On 5/4/21 7:54 PM, Paul Koning via cctalk wrote: On May 4, 2021, at 7:06 PM, Donald via cctalk wrote: In the deep recesses of my mind I seem to remember something about S/360 machines using a motor generator. If I am right was this to create a stable power source at a certain frequency or

Re: Motor generator

On 05/04/2021 06:06 PM, Donald via cctalk wrote: In the deep recesses of my mind I seem to remember something about S/360 machines using a motor generator. If I am right was this to create a stable power source at a certain frequency or voltage? Nope. I know the 360/50 and 360/65 used a

Re: Motor generator

> On May 4, 2021, at 7:53 PM, Carlos E Murillo-Sanchez via cctalk > wrote: > > Donald via cctalk wrote: >> In the deep recesses of my mind I seem to remember something about S/360 >> machines using a motor generator. >> >> >> If I am right was this to create a stable power source at a

Re: Motor generator

On 2021-05-04 8:54 p.m., Paul Koning via cctalk wrote: On May 4, 2021, at 7:06 PM, Donald via cctalk wrote: In the deep recesses of my mind I seem to remember something about S/360 machines using a motor generator. If I am right was this to create a stable power source at a certain

Re: Motor generator

> On May 4, 2021, at 7:06 PM, Donald via cctalk wrote: > > In the deep recesses of my mind I seem to remember something about S/360 > machines using a motor generator. > > If I am right was this to create a stable power source at a certain > frequency or voltage? I didn't know about S/360

Re: Motor generator

Donald via cctalk wrote: In the deep recesses of my mind I seem to remember something about S/360 machines using a motor generator. If I am right was this to create a stable power source at a certain frequency or voltage? Those systems predate my experience by roughly 25-30 years.  But

Re: Motor generator

I recall we had a motor generator and fluid cooling for the 3033 we had. We also had 2 smaller ones as well ( forget the numbers ). They all ran 360 code.. It is astounding how far things have come from that time. Dwight From: cctalk on behalf of Brent Hilpert

Re: Motor generator

On 2021-05-04 8:06 p.m., Donald via cctalk wrote: In the deep recesses of my mind I seem to remember something about S/360 machines using a motor generator. If I am right was this to create a stable power source at a certain frequency or voltage? Not just 360 but 370s as well, the 3031

Re: Motor generator

On 2021-May-04, at 4:06 PM, Donald via cctalk wrote: > In the deep recesses of my mind I seem to remember something about S/360 > machines using a motor generator. > > If I am right was this to create a stable power source at a certain > frequency or voltage? I dont know about the 360, but a

Re: Motor generator

On 5/4/21 4:06 PM, Donald via cctalk wrote: > In the deep recesses of my mind I seem to remember something about S/360 > machines using a motor generator. > > > > If I am right was this to create a stable power source at a certain > frequency or voltage? 3-phase 400 Hz, IIRC. The 3-phase

Motor generator

In the deep recesses of my mind I seem to remember something about S/360 machines using a motor generator. If I am right was this to create a stable power source at a certain frequency or voltage?

Re: That VAXStation4000vlc 3W3 video connector

> On 4 May 2021, at 19:00, cctalk-requ...@classiccmp.org wrote: > > Message: 17 > Date: Mon, 3 May 2021 16:22:45 -0700 > From: Adam Thornton > To: "General Discussion: On-Topic Posts" > Subject: That VAXStation4000vlc 3W3 video connector > Message-ID: > > Content-Type: text/plain;

Re: General Instruments Capacitive Keyboard Encoder

On Tue, May 4, 2021 at 10:33 AM Paul Birkel via cctalk wrote: > > I'm currently reverse-engineering an AMPEX keyboard that uses capacitive key > switches. The basic design employs a GI encoder coupled to an 8039 MCU > supplemented by a 2K EPROM and 74LS373 (used to latch the ROM address set >

RE: General Instruments Capacitive Keyboard Encoder

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow > via cctalk > Sent: Tuesday, May 04, 2021 9:48 AM > To: cctalk@classiccmp.org > Subject: Re: General Instruments Capacitive Keyboard Encoder > > On 5/4/21 2:33 AM, Paul Birkel via cctalk

Re: That VAXStation4000vlc 3W3 video connector

On 04/05/2021 02:29, Maciej W. Rozycki via cctalk wrote: Failing either solution you can make your own adapter cable: (you'll also need a case for the connector, the other connector and a

Re: That VAXStation4000vlc 3W3 video connector

On 05/03/2021 06:22 PM, Adam Thornton via cctalk wrote: I assume it would be way too much to hope that HD BNC would fit it? Does anyone have a pointer to the actual physical dimensions of the itty-bitty BNC-ish connector in the video port of the VAXStation4000vlc? If I can get red, green, and

Re: General Instruments Capacitive Keyboard Encoder

On 5/4/21 2:33 AM, Paul Birkel via cctalk wrote: I'm currently reverse-engineering an AMPEX keyboard that uses capacitive key switches. did all of the square foil and foam pads disintegrate in it?

Re: That VAXStation4000vlc 3W3 video connector

> On May 4, 2021, at 1:50 AM, Doug Jackson wrote: > > HI Paul, > > "I don't know what "HD BNC" means. There's only one BNC" > > Years ago when working in a university with Photomultiplier tubes, we used HV > BNC connectors - these looked like standard BNC, but were rated at 10kv. > >

Re: IBM 1410 FPGA Implementation Update - new github repository

On 5/3/2021 6:23 PM, Michael Thompson via cctech wrote: Date: Sun, 2 May 2021 15:38:33 -0500 From: Jay Jaeger Subject: IBM 1410 FPGA Implementation Update - new github repository Message-ID: <68c06711-e563-f1bf-8abc-090793bed...@charter.net> The last 12 months I have been pretty busy

RE: That VAXStation4000vlc 3W3 video connector

Adam, IBM used the same cable on the RS6000 and these pop up on e-bay from time to time. You do need a monitor that will support sync-on-green Dave > -Original Message- > From: cctech On Behalf Of Jonathan > Stone via cctech > Sent: 04 May 2021 01:31 > To: General Discussion: On-Topic

Re: That VAXStation4000vlc 3W3 video connector

On Tue, 4 May 2021 at 07:50, Doug Jackson via cctalk wrote: > > Kindest regards, > > Doug Jackson > > em: d...@doughq.com > ph: 0414 986878 > > Check out my awesome clocks at www.dougswordclocks.com > Follow my amateur radio adventures at vk1zdj.net > >

General Instruments Capacitive Keyboard Encoder

I'm currently reverse-engineering an AMPEX keyboard that uses capacitive key switches. The basic design employs a GI encoder coupled to an 8039 MCU supplemented by a 2K EPROM and 74LS373 (used to latch the ROM address set from Port A while Port A is then used to read data back from the ROM). The

Re: 920M - and also the Argus 200 / 700

Hi Jos! > in the UK around 1960 the Argus 200 was developed to control the Bristol > Bloodhound anti-aircraft rocket. This computer was one of the very first > transistor-based control computers. Absolutely - in these days Ferranti and Elliott where competitors on the European market for

Re: 920M - and also the Argus 200 / 700

Yep, Europe was also active at the time. in the UK around 1960 the Argus 200 was developed to control the Bristol Bloodhound anti-aircraft rocket. This computer was one of the very first transistor-based control computers. In Switzerland the Bloodhound was on duty  until 1999 ! One of the