2 Mar
2012
2 Mar
'12
4:40 a.m.
I'm looking for a BA123 power supply. Anybody gots? I could also
use a handful of short AUI cables.
Thanks,
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
2 Mar
2 Mar
11:04 a.m.
Hi Dave,
I have a lot of loose power supplies and cables. Do you happen to
remember the part numbers?
Paul
On 3/2/12, Dave McGuire <mcguire at neurotica.com> wrote:
I'm looking for a BA123 power supply. Anybody gots? I could also
use a handful of short AUI cables.
Thanks,
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
4:08 p.m.
Not offhand, but I can probably find out, at least for the BA123
power supply.
AUI cables, though...they're very generic, made by hundreds of
manufacturers. I used to have dozens of them in a box but I can't seem
to find them.
-Dave
On 03/02/2012 11:04 AM, Paul Anderson wrote:
I have a lot of loose power supplies and cables. Do
you happen to
remember the part numbers?
Paul
On 3/2/12, Dave McGuire<mcguire at neurotica.com> wrote:
>
> I'm looking for a BA123 power supply. Anybody gots? I could also
> use a handful of short AUI cables.
>
> Thanks,
> -Dave
>
> --
> Dave McGuire, AK4HZ
> New Kensington, PA
>
--
Dave McGuire, AK4HZ
New Kensington, PA
11:16 a.m.
I could also use a handful of short AUI cables.
Depending on what "short" means here, you may be able to make your own
with a pair of DA15s and some 15-pin ribbon cable. It doesn't have the
right transmission-line characteristics, but for sufficiently short
cables that doesn't matter in practice. (I once experimented; I had to
get up to something like three metres before I started getting a
significant level of errors.)
It seems to be difficult, at least for me, to find out just sort sort
of signals, in the electrical sense, run over AUI. But at 10Mb, bits
are roughly 50 feet long (at these frequencies, signals in copper
travel largely by skin effect at somewhere between .4 and .8
lightspeed, depending on the details of the cable), so it's no surprise
that you can get away with a lot at cable lengths of only a foot or so.
/~\ The ASCII Mouse
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X Against HTML mouse at rodents-montreal.org
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4:06 p.m.
On 03/02/2012 11:16 AM, Mouse wrote:
Yes, I've done that trick in a pinch. I'm looking to avoid having to
order connectors and take the time (even the 5mins) to make cables
though, as I'm in a really busy time right now and just want to get a
few things on the network.
One thing I want short ones for is to "dangle" a 10baseT transcievers
I could also
use a handful of short AUI cables.
Depending on what "short" means here, you may be able to make your own
with a pair of DA15s and some 15-pin ribbon cable. It doesn't have the
right transmission-line characteristics, but for sufficiently short
cables that doesn't matter in practice. (I once experimented; I had to
get up to something like three metres before I started getting a
significant level of errors.)
It seems to be difficult, at least for me, to find out just sort sort
of signals, in the electrical sense, run over AUI. But at 10Mb, bits
are roughly 50 feet long (at these frequencies, signals in copper
travel largely by skin effect at somewhere between .4 and .8
lightspeed, depending on the details of the cable), so it's no surprise
that you can get away with a lot at cable lengths of only a foot or so. from the front AUI connector on a BA213; for that I
only need 2-3
inches. When I plug transceivers directly into those AUI ports, they
protrude such that I can't close the doors.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
4:42 p.m.
Yes, I've done that trick in a pinch. I'm
looking to avoid having to
order connectors and take the time (even the 5mins) to make cables
though, as I'm in a really busy time right now and just want to get a
few things on the network.
It's probably taken you longer to send these messages than it would have
taken to crimp an IDC DA15 onto each end of a bit of cable.... And I
suspect the delivery time for such connectors from a reputable supplier
(Farnell, Digikey, etc) would be no longer than having a cable sent to you.
One thing I want short ones for is to "dangle" a 10baseT transcievers
from the front AUI connector on a BA213; for that I only need 2-3
inches. When I plug transceivers directly into those AUI ports, they
protrude such that I can't close the doors.
I would guess IDC ribbon ones wooud be great for this. They will foild
nicely, and the sonenctors are side-entry for the cable.
-tony
5:03 p.m.
On 03/02/2012 04:42 PM, Tony Duell wrote:
Sure, but those connectors aren't cheap, and people are throwing AUI
cables in the trash left and right.
Yes, I've done that before and it works great.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
Yes,
I've done that trick in a pinch. I'm looking to avoid having to
order connectors and take the time (even the 5mins) to make cables
though, as I'm in a really busy time right now and just want to get a
few things on the network.
It's probably taken you longer to send these messages than it would have
taken to crimp an IDC DA15 onto each end of a bit of cable.... And I
suspect the delivery time for such connectors from a reputable supplier
(Farnell, Digikey, etc) would be no longer than having a cable sent to you. One thing
I want short ones for is to "dangle" a 10baseT transcievers
from the front AUI connector on a BA213; for that I only need 2-3
inches. When I plug transceivers directly into those AUI ports, they
protrude such that I can't close the doors.
I would guess IDC ribbon ones wooud be great for this. They will foild
nicely, and the sonenctors are side-entry for the cable. 
5:35 p.m.
Here's an interesting connector. I wonder if this would clear any
other bulkhead connectors in the area of the AUI connector and be low
enough profile to allow the BA213 door to be closed.
http://www.l-com.com/item.aspx?id=24892
Low Profile Right Angle Adapter, DB15 Male / Female
7:17 p.m.
On 03/02/2012 05:35 PM, Glen Slick wrote:
Here's an interesting connector. I wonder if this
would clear any
other bulkhead connectors in the area of the AUI connector and be low
enough profile to allow the BA213 door to be closed.
http://www.l-com.com/item.aspx?id=24892
Low Profile Right Angle Adapter, DB15 Male / Female
That might just work!
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
3 Mar
3 Mar
2:38 p.m.
It's
probably taken you longer to send these messages than it would have
taken to crimp an IDC DA15 onto each end of a bit of cable.... And I
suspect the delivery time for such connectors from a reputable supplier
(Farnell, Digikey, etc) would be no longer than having a cable sent to you.
Sure, but those connectors aren't cheap, and people are throwing AUI
cables in the trash left and right.
2 Mar
2 Mar
4:26 p.m.
I could also use a handful of short AUI cables.
Depending on what "short" means here, you may be able to make your own
with a pair of DA15s and some 15-pin ribbon cable. It doesn't have the
right transmission-line characteristics, but for sufficiently short
cables that doesn't matter in practice. (I once experimented; I had to
get up to something like three metres before I started getting a
significant level of errors.)
It seems to be difficult, at least for me, to find out just sort sort
of signals, in the electrical sense, run over AUI. But at 10Mb, bits
OK, ther are 4 pairs in the cable. 3 of them are digital signals, the
last is the power to the trnaceiver. In the proper calbe, the power pair
is actually thicker wire than the other 3 pairs.
The power pair is 12V. The logic signals are differnetial ECL IIRC. I can
certianly check the exact detials, I have schemaitcs of ethernet
interfaces nad transceives built from simple ICs. Acutally, looking at
osmething like the PERQ scheamtics (EIO or OIO board) or the DEUNA
printset, both, I think, on bitsavers, might help.
FWIW, the cabl from the DEUNA (or wahtever board) to the bulkhead panel
and the simialr cable i nthe PERQ 2 from the header on the backplane to
the DA15 on the cabinet carry the ethernet signals, (there's no signal
circuitry at the bulkhead/cabinet end in either case) and seem to be jsut
plain IDC ribbon cable. So it's not suprising that you can use this for
short traceiver drop cables.
-tony
3 Mar
3 Mar
1:31 a.m.
Four pairs - sounds like standard UTP LAN cable
Regards
?
Rod Smallwood
?
?????
?
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Tony Duell
Sent: 02 March 2012 21:27
To: cctalk at classiccmp.org
Subject: Re: BA123 power supply, AUI cables
I have certainly doen this with no problems with short (1 foot or less)
cables to link a small transceriver to the socket on a distribution
panel.
The correct cable is not easy to get, at least not by the metre. Last
time I needed soem I fond that it was generally only possible to get a
large drunm of it costing several hundred pounds :-(.
I could also use a handful of short AUI cables.
Depending on what "short" means here, you may be able to make your own
with a pair of DA15s and some 15-pin ribbon cable. It doesn't have the
right transmission-line characteristics, but for sufficiently short
cables that doesn't matter in practice. (I once experimented; I had to
get up to something like three metres before I started getting a
significant level of errors.)
It seems to be difficult, at least for me, to find out just sort sort
of signals, in the electrical sense, run over AUI. But at 10Mb, bits
OK, ther are 4 pairs in the cable. 3 of them are digital signals, the
last is the power to the trnaceiver. In the proper calbe, the power pair
is actually thicker wire than the other 3 pairs.
The power pair is 12V. The logic signals are differnetial ECL IIRC. I can
certianly check the exact detials, I have schemaitcs of ethernet
interfaces nad transceives built from simple ICs. Acutally, looking at
osmething like the PERQ scheamtics (EIO or OIO board) or the DEUNA
printset, both, I think, on bitsavers, might help.
FWIW, the cabl from the DEUNA (or wahtever board) to the bulkhead panel
and the simialr cable i nthe PERQ 2 from the header on the backplane to
the DA15 on the cabinet carry the ethernet signals, (there's no signal
circuitry at the bulkhead/cabinet end in either case) and seem to be jsut
plain IDC ribbon cable. So it's not suprising that you can use this for
short traceiver drop cables.
-tony
2 Mar
2 Mar
6:07 p.m.
You could try here
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10221&…
chris
On Fri, Mar 2, 2012 at 1:40 AM, Dave McGuire <mcguire at neurotica.com> wrote:
I'm looking for a BA123 power supply. Anybody gots? I could also use a
handful of short AUI cables.
Thanks,
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
7:17 p.m.
On 03/02/2012 06:07 PM, Chris Halarewich wrote:
You could try here
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10221&…
Thanks! Sadly they are back-ordered, though.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
7:29 p.m.
On Fri, 2 Mar 2012, Dave McGuire wrote:
On 03/02/2012 06:07 PM, Chris Halarewich wrote:
These are 6' long, but the price is right:
http://www.sfcable.com/DB20-06.html?c=DB15-cables
I've had good service from these folks.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
You could try here
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10221&…
Thanks! Sadly they are back-ordered, though. 
3 Mar
3 Mar
1:43 a.m.
Dave McGuire wrote:
I'm looking for a BA123 power supply. Anybody gots? I could also
use a handful of short AUI cables.
Thanks,
-Dave
I should have some AUI cables. Think they are around 2ish feet each (by
memory).
Finding them might be the challenge. How many are you looking for (or
is 2-3 feet
longer than what you are looking for ?) ?
-- Curt
3:22 a.m.
Is there anyone in the UK with a few spare short AUI cables (between 2ft and
4ft?).
Thanks
Rob
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Curtis H. Wilbar Jr.
Sent: 03 March 2012 06:44
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: BA123 power supply, AUI cables
Dave McGuire wrote:
I'm looking for a BA123 power supply. Anybody gots? I could also
use a handful of short AUI cables.
Thanks,
-Dave
I should have some AUI cables. Think they are around 2ish feet each (by
memory).
Finding them might be the challenge. How many are you looking for (or is
2-3 feet longer than what you are looking for ?) ?
-- Curt
6 Mar
6 Mar
2:41 p.m.
On 03/03/2012 01:43 AM, Curtis H. Wilbar Jr. wrote:
That'd work; I just don't need any ten-footers. :) Ideally I'd like
to have three or four here.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
I'm
looking for a BA123 power supply. Anybody gots? I could also use a
handful of short AUI cables.
Thanks,
-Dave
I should have some AUI cables. Think they are around 2ish feet each (by
memory).
Finding them might be the challenge. How many are you looking for (or is
2-3 feet
longer than what you are looking for ?) ?
4526
days inactive
4530
days old
18 comments
10 participants
participants (10)
-
ard＠p850ug1.demon.co.uk -
glen.slick＠gmail.com -
halarewich＠gmail.com -
mcguire＠neurotica.com -
mloewen＠cpumagic.scol.pa.us -
mouse＠Rodents-Montreal.ORG -
rescue＠hawkmountain.net -
robert.jarratt＠ntlworld.com -
rodsmallwood＠btconnect.com -
useddec＠gmail.com