IBM would
select 415. But, then, at the time, IBM was (in)famous for being
incompatible.
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Tom Marchant
Sent: Friday, January 11, 2008 8:08 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off
On Thu, 17 Jan 2008 14:13:25 -0600, Hal Merritt wrote:
Given the availability of 400 Hz components, it baffled me why IBM would
select 415. But, then, at the time, IBM was (in)famous for being
incompatible.
I just got out of a meeting with a vendor. Somehow IBM came up and he
said, It's Big
On Thu, 10 Jan 2008 21:32:31 -0600, Paul Gilmartin wrote:
I was accustomed, decades ago, to hearing 400 Hz. Was it always
415 Hz., subject to verbal shorthand?
Yes.
--
Tom Marchant
--
For IBM-MAIN subscribe / signoff /
Sounds like the old NVIP site...
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
Of Patrick Falcone
Sent: Wednesday, January 09, 2008 11:52 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
We had fail-over to battery then to diesel. You
Subject: Re: SEMI off topic
We had fail-over to battery then to diesel. You could hear the turbines on
the Pa. turnpike a couple hundred meters prior to the Philly exit eastbound.
I just googled and it looks like anywhere from 4 - 6 ms
.
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
Of Patrick Falcone
Sent: Thursday, January 10, 2008 11:09 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
Yes. It's a damn shame, it's now history as of this past Sunday, well what
was left of us
Sent: Thursday, January 10, 2008 11:09 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
Yes. It's a damn shame, it's now history as of this past Sunday, well what
was left of us over there. I stopped by and popped a few face plates off
what was left of the hardware, took the international
: Thursday, January 10, 2008 11:45 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
Filmways corporation owned them quite a while back for a few years. Combined
then bought it. Everyone that was left got outsourced. Probably Betsy.
Gary Green [EMAIL PROTECTED] wrote:
Wow, I did not know
Tom Marchant wrote:
On Wed, 9 Jan 2008 09:36:22 -, Phil Payne wrote:
... every machine was powered via motor-generators.
For those of you who might not know what that was or why, the processors of
that time generally specified 415 Hz three phase power to operate them.
snip
True at
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of John Eells
Tom Marchant wrote:
On Wed, 9 Jan 2008 09:36:22 -, Phil Payne wrote:
... every machine was powered via motor-generators.
For those of you who might not know what that was or why, the
snip-
True at the high end only. e.g., 168s used MGs because they used
415Hz power but 158s did not; they just used regular old 3-phase 60Hz
220V power.
I never did know why, though. I always wondered whether it was to
keep the number and size of
On Thu, 10 Jan 2008 20:23:22 -0600, Rick Fochtman wrote:
snip- (John Eells)
True at the high end only. e.g., 168s used MGs because they used
415Hz power but 158s did not; they just used regular old 3-phase 60Hz
220V power.
I was accustomed, decades
Paul Gilmartin wrote:
[...]
The phrase was even for a second or two. The article makes it
pretty clear that the flywheels run all the time and there is zero
interruption.
Back to the future. Flywheels were in use in 60's. Not in IT, but in
industries, i.e. in yarn productions (synthetic
Maybe a Mythbuster question, but could they really stop your watch?
From: IBM Mainframe Discussion List on behalf of Tom Marchant
Sent: Wed 1/9/2008 8:04 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
On Wed, 9 Jan 2008 09:36:22 -, Phil Payne
On Wed, 9 Jan 2008 09:36:22 -, Phil Payne wrote:
... every machine was powered via motor-generators.
For those of you who might not know what that was or why, the processors of
that time generally specified 415 Hz three phase power to operate them. The
utilities provide 60 Hz (in the USA)
On Jan 9, 2008, at 6:08 AM, R.S. wrote:
Paul Gilmartin wrote:
[...]
The phrase was even for a second or two. The article makes it
pretty clear that the flywheels run all the time and there is zero
interruption.
Back to the future. Flywheels were in use in 60's. Not in IT, but
in
-snip--
Maybe a Mythbuster question, but could they really stop your watch?
--unsnip--
Depended on the watch and the MG set. Anti-magnetic watches were
unaffected, but I lost a couple cheap Timex watches that way. The MG
-Original Message-
From: IBM Mainframe Discussion List
[mailto:[EMAIL PROTECTED] On Behalf Of Rick Fochtman
Sent: Wednesday, January 09, 2008 10:42 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
-snip--
Maybe a Mythbuster question
We had fail-over to battery then to diesel. You could hear the turbines on the
Pa. turnpike a couple hundred meters prior to the Philly exit eastbound. I just
googled and it looks like anywhere from 4 - 6 ms.
Ed Gould [EMAIL PROTECTED] wrote: its been an interesting discussion.
Thanks all
and environmental issues make this
technology well worth a close look.
My $0.02
-Original Message-
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of R.S.
Sent: Wednesday, January 09, 2008 6:08 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: SEMI off topic
Paul Gilmartin wrote
Ed Gould wrote:
[...]
its been an interesting discussion. Thanks all for contributing. One
question remains in my mind though what is the allowable time power
maybe interrupted to a CPU ? 1 NS (nanosecond) ? or 0 NS? or ? As I said
in my original piece I am not familiar with UPS's and could
On Tue, 8 Jan 2008 20:24:49 -0600, Ed Gould [EMAIL PROTECTED] wrote:
This is not specifically MAINFRAME question But I ran across this
article that talks about replacing their UPS with a fly wheel system
(please read the article) at http://searchdatacenter.techtarget.com/
On Tue, 8 Jan 2008 20:24:49 -0600, Ed Gould wrote:
(please read the article) at
http://searchdatacenter.techtarget.com/originalContent/0,289142,sid80_gci1288892,00.html?track=NL-455ad=619599asrc=EM_NLN_2844322uid=6570353
Watch the wrap above
Repaired, I hope. You can avoid this problem
On Tue, 8 Jan 2008 21:12:47 -0600, Steve Thompson wrote:
(please read the article) at
http://searchdatacenter.techtarget.com/originalContent/0,289142,sid80_gci1288892,00.html?track=NL-455ad=619599asrc=EM_NLN_2844322uid=6570353
I don't think the person that wrote that article was really up
Paul Gilmartin wrote:
On Tue, 8 Jan 2008 21:12:47 -0600, Steve Thompson wrote:
(please read the article) at
http://searchdatacenter.techtarget.com/originalContent/0,289142,sid80_gci1288892,00.html?track=NL-455ad=619599asrc=EM_NLN_2844322uid=6570353
I don't think the person that wrote
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