Ripping a phone book in half is really quite easy if you know the trick.
Just break the spine (it helps if the humidity is low, so the paper is less
flexible) first. Once the pages are torn at the spine, you can rip them the
rest of the way.
-----Original Message-----
From: Sellam Ismail [mailto:foo@siconic.com]
Sent: Thursday, June 20, 2002 11:54 AM
To: cctalk(a)classiccmp.org
Subject: Re: Computers in Public Xport
<snip>
I always did want to learn how to rip a phone book in half with my bare
hands but never got around to ordering.
Sellam Ismail Vintage Computer
Festival
----------------------------------------------------------------------------
--
International Man of Intrigue and Danger
http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com
*
>From: "Rick Bensene" <rickb(a)bensene.com>
>
>This could be a mercury delay line. Remington Rand did use mercury
>delay lines in
>some of their early computers.
>
Hi Rich
A mercury line would have a hose with mercury
in it ( or metal tubing ) and tranducers at each end.
I've seen several of these and this is not one.
I suspect that it is some kind of lamp or heater.
For what, I don't know.
Dwight
Hi
I'm going to make a wild guess. This was a flash
tube used to sychronize a neon light computer.
Anyway, I don't think it is a delay line.
Dwight
>From: "Gary Hildebrand" <ghldbrd(a)ccp.com>
>
>Bill Sudbrink wrote:
>>
>> I've never seen one and couldn't find a clear picture
>> on the web anywhere. Is this an acoustic delay line?
>>
>> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=887259145
>
>I'd guess that it is either a TWT, or maybe an X-ray tube of some sort.
>Definitely NOT a delay line.
>
>Gary Hildebrand
>St. Joseph, MO
>
I just found a box of stuff that hasn't seen the light of day since my
company moved to our current building some 15 years ago.
In it was a Bulk Tape Eraser. The box pictures it being used on 5.25
floppies (as well as an 8 track tape and reel to reel tape). Is it safe
to use on floppy disks? I have a stack of HD 3.5's that I want to blank
out. Previously I just run them thru a computer to format them, but if a
bulk tape eraser can be used, it just saves me the trouble.
Also, how exactly are you supposed to use one? It has been as long since
I used one (probably this same one, used to use it to blank reel to reel
audio tapes). I thought I remembered that all you do is turn it on, hold
it over the item for a few seconds, wave it back and forth a bit, and
that was it. The item would be erased.
I just tried this one on a VHS video tape, it doesn't seem to do anything
to it. The picture is slightly distorted, but the tape is certainly not
blanked, not even close. I left it on for a good 30 to 45 seconds (the
label on the side of it says 1 minute on 20 minutes off, so I didn't want
to go beyond 1 minute).
It has a momentary switch on the handle, so it clearly isn't designed to
be left on very long. It makes a slight humm when on (and vibrates just a
touch, nothing visible, but you can feel it in your hand) so I assume it
is working. However, this is a Radio Shack brand item, so who knows if it
is doing what it should considering it is probably over 20 years old.
Any clues?
-chris
<http://www.mythtech.net>
My company is cleaning house and throwing away a bunch of 9-track
round-reel mainframe tapes. If anyone can use some and is willing to pay
shipping (or pick them up in Nebraska) I will grab some. Let me know by
private e-mail please.
Hi,
I've just finished pulling an old Sierra Semiconductor FSK modem chipset
off an old modem board and I've hit a brick wall - I can't get any
datasheets. Sierra (now known as PMC-Sierra) don't have the datasheets,
their disti (Memec) don't have them...
The only site/company that does have them is FreeTradeZone
(www.freetradezone.com), but I don't fancy paying $10,000 per year for maybe
two or three datasheets a year.
BTW, the ICs are:
SC11011
SC11026
SC22201
Anyone got datasheets for these things lying around?
Finally, anyone know how to straighten pins on a QFP packaged IC without
breaking them? I've got a Motorola DSP (QFP100 package) but I managed to
bend some of the pins when I desoldered it...
Thanks.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
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> F.Y.I. - My Cabletron MRXI hubs have RJ-45 sockets, for hooking up
>to a serial VT420 terminal... :)
> But, yes, I agree. Those hubs are the only time _I've_ seen RJ-45
>used for serial communication.
Various terminal servers use RJ45 for serial
comms. One of the selling points of CAT5 was
that you wire your building once with CAT5 and
then can use the same wires for voice and data.
The data was usually either ethernet traffic
or serial comms (for printers and such). The
connectors were invariably (at least in my experince)
RJ45 for both ethernet and serial (and ISDN too).
Antonio
I have some old DEC RL01 packs with PDP-11
diagnostic utilities - these are DEC originals:
AX-E380L-MC DLDP+DIAG#1 + DECX A1 SYSTEM A
AX-E441L-MC CZZLBLO DLDP+DIAG #2 + CPUTST + DECX B1 SYS B
They won't last forever, and I don't have any spare media
to back them up to, so I'd like to archive this software onto
my PC (for posterity - or perhaps to make available
to other hobbyists for use in the emulator, though I'm not
sure whether the Mentec license would cover this - it does say
"and associated utilities" however).
The question is, how can I get a copy of a pack as a
binary image onto the PC ? (to load in simh for example ?)
I have a working serial port, and I can run kermit OK on RT-11. However,
even if RT-11 will read the pack in DL1: (and I'm not
even sure of that), how can I persuade kermit
to take a copy of DL1: as an image ? I haven't found
a way of doing this. Simply doing "get DL1:"
doesn't seem to work.
Is there any kermit-like software out there that has
a PC client and can do a disk image transfer ?
Thanks in advance,
F
EET'S ALIVE! Well, I finally hobbled together a 'console cable' that
connects its monochrome output to my TV and to a LK201 keyboard. Now I
just could use a 'better' OS for the thing than P/OS. [Also, I could use
soemthing that told me how much memory it has in it...]
Has anyone ever hacked RSX-11M or RSX-11M+ to work on it? Are there any
guides for RSX-11M(+)? How should I cure my insanity? :)
Is VENIX worth trying on this thing?
-- Pat
>OK, I now have a bootable RX-50. My question is what is the difference
>between DL.SYS and DLX.SYS drivers? Is the non-x version unibus and the
>with-x version qbus or something?
The dd.SYS form of the driver is for the SB (formerly SJ) and FB
monitors (kernel, for unix weenies :-) The ddX.SYS form of the driver
is for the XM (XM, ZM, ZB) monitor(s). These last monitors are the ones
which have directives for controlling extended memory (anything beyond
64kb) and the drivers know how to get data from, and put data to, user
buffers in extended memory.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: gentry at zk3.dec.com (work) |
| Unix Support Engineering Group | mbg at world.std.com (home) |
| Hewlett Packard | (s/ at /@/) |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+