On Mar 5, 8:14, Vintage Computer Festival wrote:
> On Fri, 5 Mar 2004, Pete Turnbull wrote:
> > The moulded ones, usually beige in colour, a bit thicker than a
pencil,
> > or somewhat thicker than thinnet cable, are office-grade.
[...]
> > All the standard-grade ones I've
> > ever seen are blue, and about as thick as yellow etherhose.
> Ah, thanks for solving the mystery of the weird DA15 cables I got in
the
> other day. Now I know these are AUI cables. Useful.
As Paul pointed out, there were other colours -- they just happen to be
very rare here, and I've only ever seen blue ones. However, some of
those blue ones weren't PVC, so perhaps they're low smoke/no fume
(LSOF). I've also got at least two types of thick ether cable, but
both are yellow. And several types of thinnet, including yellow and
grey as well as the more common black.
As Paul and der Mouse suggested, I agree that it would be worth making
up a short flexible AUI cable. Cat 5 is 100-ohm, and ribbon cable is
not far off that IIRC; you could use STP instead of UTP to get the
shield (some Sun cables are STP), or just ignore it for really a short
(a few inches) cable. Or a chunk of old good-quality serial cable
should do a good job over short distances, I expect.
--
Pete Peter Turnbull
Network Manager
University of York
On Mar 5, 9:37, Paul Koning wrote:
> There was some prototype 10Base5 cable that was yellow PE, though.
It
> had black stripes to mark transceiver spacing. So it got the
nickname
> "yellowjacket".
According to the standard, the markings are supposed to be on all
10base5 cable; they're to indicate where it's safe to put a
transceiver, and where to cut the cable at the ends. They're every 2.5
metres, and there should be at least two between transceivers.
However, I've seen cable that didn't have the bands, but it was
probably ordinary coax rather than intended specifically for ethernet.
--
Pete Peter Turnbull
Network Manager
University of York
Yo Joe!
I finally found this. Is this the manual you were needing? Still need
a copy/scan?
--
Sellam Ismail Vintage Computer Festival
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The Classiccmp server is having some hard drive trouble again. With the
160gb WD drive I put in not too long ago. You may see some blips on the
radar screen while I try to copy things off :\
Jay
---
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On Mar 4, 9:34, Witchy wrote:
> > the CRT can hold a charge for a lot longer than 'overnight'.
>
> Ah, I didn't know that - I thought they discharged naturally.....
>
> > and it may cause you to drop the CRT. I alwayse discharge a
> > CRT with my
> > EHT probe before handling it.
I'll second that.
Not only do CRTs not discharge naturally (unless they're in circuit
with a bleed resistor), a disconnected and supposedly-discharged CRT
may develop a charge if left alone. The original EHT can force
electrons into the glass, and since glass is an excellent insulator,
they don't come out again immediately when you discharge the tube.
They *may* come to the surface slowly later, and give the CRT a
significant charge of opposite to the original polarity. So leave a
bleed resistor across a tube you plan to store for a long period (tip
given to me by a TV repairman).
If you're discharging a recently-used tube, don't use a simple
resistor. The EHT on a CRT could be anything from 8kV to several tens
of kV in a fancy colour tube, and most common resistors have a
breakdown voltage of only 500-1000V. Besides, think about the power
dissipation if you discharge a 25kV tube through a 10M resistor: 2.5
milliamps, but 62 watts. Sure, that 62W won't last long, but neither
the tube nor your resistor will like it!
--
Pete Peter Turnbull
Network Manager
University of York
On Mar 4, 22:57, meltie wrote:
> On Thursday 04 March 2004 22:41, John Honniball wrote:
> > meltie wrote:
> > > Does anyone in the UK or immediate surrounds have an AUI cable
around
> > > that they'd be willing to part with for a small amount of beer
tokens?
> >
> > I can do you an AUI cable, but it'd be a "normal", non-right-angle
one.
> > Let me know if that'd be OK. Send clearance dimensions if you can!
>
> After a quick look, it's around 4.2 - 4.3 cm...Is it doable?
There's no way a standard-grade blue AUI cable will turn through 90 in
less than 15 cm. It might just be doable with an office-grade cable.
They tend to be thinner and more flexible than the proper thick blue
ones. Or you could remove the cover and fit a right-angle cover,
probably. You could certainly do that with an office-grade cable -- I
used to have one like that.
I seem to remember having a genuine DEC beige transceiver, about twice
the size of the minature Allied Telesyn ones that are so common, which
had the AUI connector on the side instead of the end.
--
Pete Peter Turnbull
Network Manager
University of York
Hi
Ok, this is just too much of a coincidence.
We just got 5 post that were queries about
post to our group. Only one of the post recognized
that they were sending to a group. I find it
hard to believe that these are simple people
looking for information ( all at the same time ).
I sure wish I knew what they were up to or maybe
it is the end result of some virus. I just doesn't
make any sense.
See:
Heathkit ES-400
atc-510 simulator
Texas Instuments TIL-306
Old Tandy Computer Equipment
Hi, Hp logic analyzer
What are they up to. Are these really valid queries??
Dwight
Hi,
My name is Miller Miller and I was looking for some TIL-306 Displays and I came across your forum.
You mentioned that you knew a supplier that might have some surplus of these. Does he still have them?
Can you tell me who it is.
Thanks for any help that can provide.
Mike Miller
Hi,
I'm trying to figure out what this board is/does. It's a DEC hex height
board marked M8597A. On the back it's also marked PDP 8A Control.
Anyone have any ideas?
Thanks.
--
TTFN - Guy
