Hello all on The List; I have been a Lurker here for several
months but this is the first opportunity I have taken to actually
POST something.
For PDP11 folk in the Southern California area, I will have
several items of related gear at the TRW Ham Radio Swapmeet in El
Segundo, on Saturday Jan the 31st, 7:30am to 11:30am. (The meet is
always held the last Saturday of the month)
I have several Plessey pieces, including a MicroII which boots
into ODT - but I have no disk OS for it.. and a Plessey dual 8"
drive module... a Kennedy 5360 Hard Disk with a lucite see-thru
cover.. it spins up and comes into ready, but the drive-to-I/F card
was mechanically smashed. I have an RA60 that looks good but is
untested and an RL02 junk for parts. Also many other bits and pieces
and boards.. I am trying to thin out and concentrate my PDP collection.
I WOULD LIKE: a formatter/interface card(s) to hook a Kennedy 9300
9-trk to an 11/34a... also A/D and D/A cards for the MINC11, and/or
70's vintage stand-alone or DEC-specific D/A converters. All items I
have are for sale/trade/free to good home, and transportation in the
SoCal area is included... longer distances according to value of
bribe offered. :)
AT TRW I am in spaces J21-J23, near the east side of the lot and
across from a blue tent with CDroms all over. White Toyota P/U
Truck full of Old Stuff, you probably can't miss it.
I know this is CA-specific, but one never knows who might be
traveling and would be interested. A URL with pix of my stuff is
available, but waiting for renovation of the Old Computer section.
Please feel free to write to my e-mail address if you would like
more info or just to chat... I don't wish to take up ListSpace with
personal communications. ;}
Thank you for all the great info... many posts have helped me get
my own jun^H^H^H systems working thru others giving good advice.
Cheers,
John
At 08:23 PM 1/18/98 -0600, you wrote:
>> If anyone knows where I can buy a NeXT cube at a decent price, please
>> let me know.
Okay, I know NeXT was the baby of Steve Jobs, but what exactly is it based
on? Is it an entirely new animal? If anyone can point me to some info, I'd
appreciate it.
-John Higginbotham-
-limbo.netpath.net-
Having an IBM mainframe would be great provided you have a direct
connect to the nearest power station! Here's several messages from
knowledgeable folks that posted to alt.folklore.computers awhile back:
[Message 1 of 4 in thread 148 of 176] alt.folklore.computers
Re: IBM Mainframes: Power & Coolant Requirements
From: Alan Greenberg <ALAN(a)VM1.McGill.CA>
Date: Wed, 23 Aug 95 20:33:11 EDT (Page 1 of 2)
In article <BNIDrJa.jrbrady(a)delphi.com>
Jason Brady <jrbrady(a)delphi.com> writes:
>
>Does anyone have any insights as to the power requirements for the
>beasts? How about the liquid coolant (I think one of the many system
>components was the PDU "power/coolant distribution unit"?)
We just replaced a two processor 3090 with a new CMOS-based system.
The new systems was cost-justified partly on the energy savings.
The processor complex ate up about 55 KVA, mostly in 415 Hz power
(which is what the motor-generator created from 60 Hz - just as
with airborne equipment, the higher frequency makes for smaller
DC power supplies). Onto that, you need to add the cost of
removing the heat - perhaps another 25-50% for a total power
consumption of about 60-70 KVA. A complex with more processors
would of course take more power.
I should point out that this was a 9 year old machine....
We replaced it with a new box that draw less than 1,500 watts!
Alan Greenberg
Re: IBM Mainframes: Power & Coolant Requirements
From: Joe Morris <jcmorris(a)mwunix.mitre.org>
Date: 24 Aug 1995 14:42:30 GMT (Page 1 of 2)
Jason Brady <jrbrady(a)delphi.com> writes:
>I never got involved with the facilities support side of the place, but
>remember one day when an emergency shutdown was attributed to a "motor-
>generator failure."
A lot of the big systems used MG sets, both as frequency translators (some
circuits were designed for 400 Hz supply) and as an isolation mechanism
to prevent garbage on the power feed from getting into the computer. The
rotating mass of the MG provided excellent ride-through for short outages
of the commercial power.
At a PPOE in the mid-1970s we had an IBM 370/148 (with MG), an IBM 360/65
(no MG) and a DEC DECsystem KL10 (no MG). We also had a Dranitz power line
monitor tied to the power mains; based on its output we could show how
well the systems handled dropouts in the power.
The DECsystem 10 never survived more than about 3 or 4 cycles outage; the
360/65 died at about 16 cycles, and the 148 could tolerate almost a
full second. (We got lots of opportunities to collect data points ...
thanks, TVA.)
Of course, the peripherals on the 148 would usually die on an outage of
one second, but the CPU itself would survive without taking a power check.
(The shop didn't have the funds and/or will to buy a UPS, even though I
managed to include a room for one in the building when it was designed.)
The problem with the DEC box didn't surprise me at all. There were a
lot of nice features in the design, but the impression I got was that
DEC designed the power circuits on a day after the engineers had spent
the previous night in a bar. At one time I found that the box was
dumping almost 8A of current down the *ground* line, yet the DEC
CE insisted that the box was installed and working correctly. It
also was dumping over 20A down the neutral line on a 3-phase circuit;
not the safety issue of ground current, but still indicative of poor
design.
Joe Morris / MITRE
[Message 3 of 4 in thread 148 of 176] alt.folklore.computers
Re: IBM Mainframes: Power & Coolant Requirements
From: Joe Morris <jcmorris(a)mwunix.mitre.org>
Date: 24 Aug 1995 15:04:21 GMT (Page 1 of 2)
Responding to: <41e5j3$id(a)news.iadfw.net>
mcw(a)gateway.airmail.net (Mike Wommack) writes:
>I used to work as an Electrician at an IBM site a few years back. I know
>the 3380(?) DASD strings took 220v at 100A. The plugs were huge. I also
>recall what looked like 3/4" water lines used to cool the main processor.
>(Which was either a 3090 or ES9000.)
If it was a US site, the 3380 box probably was being fed with 208VAC,
3-phase power at no more than 60A; the box is spec'ed at requiring
no more than 8.2 KVA. In the case of the 3380 the power connector
is an R&S 7328 plug, which is rated at only 60A.
(You could get the box wired for other voltages, so a 220 VAC feed
is possible but if that was the voltage the current draw would have
been even less than at 208.)
The size of the connectors in the power lines is often mandated by NEC
(National Electric Code) and/or local code requirements, which for
underfloor installation often require watertight connections (and thus
increase the size of the connector).
Joe Morris / MITRE
Not in toronto, but I live in Castlegar British Columbia, Canada
Nice Computer website.
Chris :)
>On 18 Jan 98 at 16:50, Unusual systems wrote:
>
>> Did any one ever reply? I believe I'm the chap in the K-W area. We once had
>> Canada's first computer museum, but it has since closed. Have you seen our
>> web site? www.sentex.net/~ccmuseum.
>>
>> Please let me know what I can do to help you.
>>
>Not a peep !! It's amazing that the 5th largest city in N.A. has nary
>a one. Only you and Charlie Fox in Windsor TMK. Thanks for the URL
>I had a reference to it at one time but misplaced it.
> Any other TO area folks on the list ?
>
>ciao larry
>>
>>
>lwalkerN0spaM(a)interlog.com
>
>
Isaac,
Did this list get anywhere? I just found this discussion today, although
I have been collecting and have had a collecting page on the web for two
years. If it has amounted to something, please add my name and email.
Brian Mahoney
in Toronto, Ontario, Canada.
bmahoney(a)sprint.ca
Thanks
At 05:04 PM 1/19/98 +0000, you wrote:
>> Oh, they also had a few IBM PS/2 style monitors with a single RCA jack
>>
> What denotes a PS/2 "style" monitor ? I haven't heard this term
>before and have several P/S2 s. The RCA jack would suggest a
>composite monitor.
It's the kind of case; the PS/2 style is rather different from the old 5150
style.
Dunno if it was actually part of the PS/2 line-up or not.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
At 08:31 PM 1/18/98 -0600, you wrote:
>Would any collectors be interested in Kaypros.
>
>I have four -- some complete with original advertisement, software,
>manuals, etc.
Definitely! Where and how much? Which models? Thanks!
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
At 09:30 PM 1/19/98 -0600, Anthony Clifton wrote:
>
>Yeah ok. I just report what I'm told. I'm not a salesman. I'm not an
>apologist. If you want to negotiate price with the guy contact him
>directly at squest(a)cris.com. I'm not making any money off them. I don't
>care if sells any. I don't care if anyone buys any.
>Anthony Clifton - Wirehead
> Cliff Gregory Wrote:
>> Seems to me these kits are still available from some distributor on the net
>> for around $30. I'll see if I can dig up the exact URL.
[snip]
Sir Anthony,
I don't believe that Sir Cliff was undermining your post -- for you posted
no actual prices. All you stated was: "at what looks like an interesting
price."
An interesting price to me is $5.00. An interesting price to another could
be $500.00. Frankly, I wouldn't pay either price right now due to lack of
spare time to actually build the kit (which is what I would do -- I *like*
trying to burn my fingers with a soldering iron (thank goodness I'm
horrible at it - the burning, that is ;-)).
I believe Cliff was just mentioning the URL just in case the Sinclair kit
that you mentioned was already gone -- there may be a source for more so
that others could enjoy them to. [Of course, I'm an optimist...]
Anyway, that's my take on this situation -- now back to the rest of my
(short) 12-hour shift.
See ya, and chin up, eh?
Roger "Merch" Merchberger
--
Roger Merchberger | Why does Hershey's put nutritional
Programmer, NorthernWay | information on their candy bar wrappers
zmerch(a)northernway.net | when there's no nutritional value within?
Spotted a few things that someone might be interested in, and that I wasn't
sure what they were...
First, and oddest, was a pizza box labelled Nissho Electronics. Looked
like a workstation, one 3.5". Almost got it, but for $26... Anyone know
what it might have been?
Commodore 64 for $5, 64c in the box for $15 -- Anyone interested?
I know what a 1541 disk drive is, but what about a Vic-1541? Is it worth $10?
I did pick up a C modem/300 (model 1660) for $.99 and an Osborne 1 keyboard
(only!) for (I know, too much, but it's an Osborne!) $5.
Oh, they also had a few IBM PS/2 style monitors with a single RCA jack
input on the back; they were mounted on little stands, kinda like (I think)
the Apple IIc monitors. Possibly Composite? Possibly from some POS
terminal/cash register? A little steep at $26 though. (Looked new though!)
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
At 08:24 19/01/98 -0500, you wrote:
>The Vic-1541's are somewhat more uncommon that the
>C-1541's, and are in a little more demand among Commodore collectors for
>that reason.
..omissis..
>Now then, should you happen across one labled "Vic-1540", you had better
>grab it as they are ultra-rare. I've only heard that they exist, I've never
>actually seen one.
Who saw a C=1570?
How much would worth?
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