On Fri, May 7, 2021 at 7:20 PM ben via cctalk wrote:
> >
> Well I am a Audio-Fool. Like they say "A fool and his money.. ".
> Secret word of the day "ElectroStatic Speakers".
I do not consider that to be audiophoolery.
The charateristics of a particular electrostatic speaker are
measurable. Th
On 5/6/2021 8:00 AM, David Barto via cctalk wrote:
I don’t refer to them as Audio-phools.
They are GESR’s. (pronounced guesser)
Golden
Eared
Sonic
Reviewers
They guess this sounds better than that, so it must be worth it.
David
On May 5, 2021, at 6:31 PM, Jay Jaeger via cctalk wrot
On 5/7/21 2:36 AM, Curious Marc via cctalk wrote:
> The IBM 7090 used a motor generator, IBM model 7618 apparently
> http://ed-thelen.org/comp-hist/7090-PowerSupplyControl&Distribution-223-6904.pdf
I mentioned that about a dozen posts back:
The 7090 certainly used MG sets. From
On Friday (05/07/2021 at 09:03AM -0700), Chuck Guzis wrote:
> On 5/7/21 5:53 AM, Chris Elmquist wrote:
>
> > The HQ building (nee BTC) was built just a year before ETA started,
> > so 1982 or so. But somehow it ended up with very 70s-ish decor, even
> > if it was all new 70s-ish decor. It's poss
On 5/7/21 5:53 AM, Chris Elmquist wrote:
> The HQ building (nee BTC) was built just a year before ETA started,
> so 1982 or so. But somehow it ended up with very 70s-ish decor, even
> if it was all new 70s-ish decor. It's possible they wanted all the guys
> that moved down from ARHOPS and ADL to
On Thursday (05/06/2021 at 08:37PM -0700), Chuck Guzis wrote:
> On 5/6/21 7:47 PM, Chris Elmquist wrote:
> > We had a room on the ground floor at ETA that housed an MG set that
> > ran the CY205 (and maybe the 835 and 875 too) in the basement. They
> > had isolated the MG from the mounting pretty
The IBM 7090 used a motor generator, IBM model 7618 apparently
http://ed-thelen.org/comp-hist/7090-PowerSupplyControl&Distribution-223-6904.pdf
Marc
> On May 4, 2021, at 5:03 PM, Jon Elson via cctalk
> wrote:
>
> On 05/04/2021 06:06 PM, Donald via cctalk wrote:
>> In t
On 5/6/21 7:47 PM, Chris Elmquist wrote:
> We had a room on the ground floor at ETA that housed an MG set that
> ran the CY205 (and maybe the 835 and 875 too) in the basement. They
> had isolated the MG from the mounting pretty well in addition to
> sound proofing the room because with door closed
inois PLATO system which had a pair of 6500 systems, the
>> motor-generator was located near the elevator machinery in a corner
>> of the building, far from the computer room. Yes, it was noisy, but
>> no one spent any time in that location. The computer room was -- by
>>
On Thu, 6 May 2021 at 16:13, Paul Koning wrote:
> > I suppose APL might come closest, but it's hardly mainstream.
>
> No reason why it couldn't be. It's the same age as C, so why not? :-)
I think because for lesser minds, such as mine, it's line noise.
A friend of mine, a Perl guru, studied A
> On May 6, 2021, at 9:45 AM, Liam Proven via cctalk
> wrote:
>
> On Thu, 6 May 2021 at 02:19, Jules Richardson via cctalk
> wrote:
>>
>> I seem to recall an anecdote about Acorn hooking up the first prototype
>> ARM-1 processor and it working, despite showing no current draw on the
>> conn
I don’t refer to them as Audio-phools.
They are GESR’s. (pronounced guesser)
Golden
Eared
Sonic
Reviewers
They guess this sounds better than that, so it must be worth it.
David
> On May 5, 2021, at 6:31 PM, Jay Jaeger via cctalk
> wrote:
>
> I think a lot of the time audio-phools, i
On Thu, 6 May 2021 at 02:19, Jules Richardson via cctalk
wrote:
>
> I seem to recall an anecdote about Acorn hooking up the first prototype
> ARM-1 processor and it working, despite showing no current draw on the
> connected ammeter - it then transpired that the power supply was still
> switched o
On 5/6/2021 8:26 AM, Jay Jaeger via cctalk wrote:
Apparently, yes: https://dl.acm.org/doi/10.1145/365660.365671
https://docs.lib.purdue.edu/dissertations/AAI7003878/
https://minds.wisconsin.edu/bitstream/handle/1793/57766/TR160.pdf?sequence=1&isAllowed=y
The last two papers involved
On 5/6/2021 12:14 AM, Chuck Guzis via cctalk wrote:
On 5/5/21 6:40 PM, Jay Jaeger via cctalk wrote:
While I was in grad school at U.W. (the one in Wisconsin) we had
obtained via surplus an IBM 7094 II from military surplus - I seem to
recall WSMR (White Sands Missle Range). Of course, it had a
>
> Date: Wed, 5 May 2021 13:20:59 +0100
> From:
> Subject: RE: Motor generator
>
> We had a Motor/Generator for our Honeywell L66. Not sure it was because it
> wanted US voltages or just for a clean supply
> Dave
>
I also worked on a Honeywell L66 that had two motor-g
On 5/5/21 6:40 PM, Jay Jaeger via cctalk wrote:
>
> While I was in grad school at U.W. (the one in Wisconsin) we had
> obtained via surplus an IBM 7094 II from military surplus - I seem to
> recall WSMR (White Sands Missle Range). Of course, it had an MG. We
> got it put together and with a repl
On 5/5/2021 7:18 PM, Jules Richardson via cctalk wrote:
On 5/5/21 6:09 AM, Mark Linimon via cctalk wrote:
On Tue, May 04, 2021 at 10:07:28PM -0700, Chuck Guzis via cctech wrote:
"Power for the basic computer consists of one 250 kva, 400 Hz motor
generator set. The motor-generator set ha
I think a lot of the time audio-phools, if they will be honest with
themselves, are really trying to recreate the stereo (or even HiFi)
sounds of the 1960s because they have fond memories and like it better.
THAT I have no problem with whatsoever.
What gets annoying is when the phools try and
On 05/05/2021 07:44 PM, Donald via cctalk wrote:
Many thanks for all the info. I just wanted to make sure my recesses were
right.
I asked about MG because, in an audio forum, I see folks paying crazy money
for AC cords and power line conditioners. I thought a good MG would solve
many of th
Many thanks for all the info. I just wanted to make sure my recesses were
right.
I asked about MG because, in an audio forum, I see folks paying crazy money
for AC cords and power line conditioners. I thought a good MG would solve
many of the 'problems' they are trying to fix.
On 5/5/21 6:09 AM, Mark Linimon via cctalk wrote:
On Tue, May 04, 2021 at 10:07:28PM -0700, Chuck Guzis via cctech wrote:
"Power for the basic computer consists of one 250 kva, 400 Hz motor
generator set. The motor-generator set has the capability of providing
power for the CPU, MCS, I/
On 05/05/2021 10:36 AM, Chuck Guzis via cctalk wrote:
As far as any "whine"--I vaguely recall hearing a
high-pitched whine if I put my ear close to the power
adjustment panel in a CDC Cyber--but it was barely audible.
The inverter whine on the 360/50 and /65 was completely
insane, and the 250
On 05/05/2021 12:07 AM, Chuck Guzis via cctalk wrote:
Small S/360 systems were operated from standard AC distribution. I
don't know where the breakover was for IBM S/360; probably not for the
model 30, 40, or 75. The 195, I suspect did use an MG set.
"Real" 360's did not use MG sets. By rea
On 5/5/21 5:18 AM, Paul Koning wrote:
> An earlier message commented on the whine from power converters. I
> don't know how common this practice was, but at the University of
> Illinois PLATO system which had a pair of 6500 systems, the
> motor-generator was located near the e
> -Original Message-
> From: cctalk On Behalf Of Mark Linimon via
> cctalk
> Sent: 05 May 2021 12:10
> To: Chuck Guzis ; General Discussion: On-Topic Posts
>
> Cc: Donald via cctalk
> Subject: Re: Motor generator
>
> On Tue, May 04, 2021 at 10:07:28PM
age 25):
>
> "Power for the basic computer consists of one 250 kva, 400 Hz motor
> generator set. The motor-generator set has the capability of providing
> power for the CPU, MCS, I/O and the MCU. The optional memory requires
> the addition of an 80 kva motor-generator set."
>
On Tue, May 04, 2021 at 10:07:28PM -0700, Chuck Guzis via cctech wrote:
> "Power for the basic computer consists of one 250 kva, 400 Hz motor
> generator set. The motor-generator set has the capability of providing
> power for the CPU, MCS, I/O and the MCU. The optional memory
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-ge
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.
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
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
> 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
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
> 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 di
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
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
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
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
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
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?
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