-----Original Message-----
From: Max Eskin <max82(a)surfree.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, 6 April 1999 11:29
Subject: Re: ABS - or is it Pure BS
>On Mon, 5 Apr 1999, Allison J Parent wrote:
>>The put ABS on BIG airplanes for a reason and not for the added weight.
>
>I don't know if my Microsoft Flight Simulator experience is worth
>anything,
With all due respect, IMHO, simulators that are not mounted on big hydraulic
jacks and convince you that you are in a real aeroplane are not much chop
for anything except perhaps teaching instrument flying, and fairly limited
in that area.
>but judging by what I've seen both in it and in various 'Worst
>Aircraft Tragedies' shows, big airplanes aren't maneuvrable enough to turn
>while they're skidding.
The whole point of abs on a heavy aircraft is so they DON'T skid. My
experience with virually all vehicles is that they are difficult to maneuvre
whilst skidding!
Can't comment on the snow and ice issue, (never see that around here) but
abs can be hazardous on gravel roads (we have lots of them) IF the driver is
not aware of, and trained in the way it affects vehicle handling. Many of
our urban brethren manage to come unstuck on gravel, country boys don't seem
to have much trouble, whether they have abs or not, so I suspect the biggest
factor is not the vehicle or it's braking system, but the skill level of the
driver and the degree of familiarity with the vehicle, it's handling and the
road surface..
>And don't they turn by adjusting the engine thrust
Not since the DC3 days. No, they have steerable nosewheels, attached to the
rudder pedals, or to an auxiliary steering wheel. Steering with
differential throttle may be used to ASSIST in turning an aircraft, but not
on it's own, unless the nosewheel steering has failed.
Geoff Roberts
VK5KDR
200+ hours in various light aircraft.
10 years in Air Traffic Services
5 of 'em at Sydney Kingsford-Smith.
5 in the bush 300 miles from anywhere.
O.K. I think I have it figured out. I'll have to either get a cable for
the external drives (or make one). I was thinking that the 4869 was the
drive that would be used with the 5170, but it isn't. Was there a drive box
available from IBM for the 5150 (or was that the expansion chassis)?
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
-----Original Message-----
From: Joe <rigdonj(a)intellistar.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, April 05, 1999 1:33 PM
Subject: Re: IBM 5150 PC disk drive questions
>Jason,
>
> The external cable had two connectors and a twist in it just like the
>internal one.
>
>
> Joe
>
>At 01:29 PM 4/5/99 -0400, you wrote:
>>According to the jumper settings on the 5150, it appears that 4 floppy
>>drives can be connected to the computer. How is this possible? I'm
>>guessing 2 internal, and two external, but there's only one connector for
an
>>external drive, so it would only allow 3 drives.
>>Or is there a special controller that has dual external ports?
>>
>>Any suggestions?
>>
>>ThAnX,
>>--
>> -Jason Willgruber
>> (roblwill(a)usaor.net)
>> ICQ#: 1730318
>><http://members.tripod.com/general_1>
>>
>>
>
>
<lamps but they are 5v versions rather than the 8v lamps of the original. I
<do however minimize the hours on that panel since I worry about the lamps
<burning out. (I've got three spares left ...)
Even back when it was a common hack as well as commercial LED replacements
for either 8E logic. If done as was common back then it would be legit.
Oh the leds used then were ONLY available in red or IR.
Replacement bulbs can be had as well but the LED fix is permanent.
Allison
For those who may need such a thing . . . Contact the poster directly,
not me.
>X-Mailer: Juno 2.0.11
>Date: Mon, 5 Apr 1999 20:56:34 -0400
>Reply-To: jimconners(a)JUNO.COM
>Sender: Heathkit Owners and Collectors List <HEATH(a)LISTSERV.TEMPE.GOV>
>From: Jim Conners <jimconners(a)JUNO.COM>
>Subject: TRANSFORMER
>To: HEATH(a)LISTSERV.TEMPE.GOV
>
>Hi,
>I just found tucked away a brand new transformer for an H-89 computer.
>It is marked 54-969 and 172-7575 on the tape on the box and it is marked
>54-969 and 60-8204 on the transformer. I was wondering if anyone knew if
>this part may have been used in any other Heathkits. I doubt anyone is
>repairing an H-89.
>Thanks,
>Jim
>
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>To subscribe: listserv(a)listserv.tempe.gov
>and in body: subscribe HEATH yourfirstname yourlastname
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Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.ggw.org/awa
This winter, I had a small argument with my dad as to who's car would stop
faster - his 1994 Ford explorer, or my 1983 AMC Wagoneer. He claimed that
his would stop faster because of the ABS.
We both drove to the top of the hill (about 200 feet, 30 degree slope - snow
covered). We went down the hill at separate times, each going 15 MPH at the
time the brakes were applied. The Jeep, without ABS, and the same type of
tires as the Ford (Firestone ATX - studded), stopped about 5 feet shorter
than the Ford.
Anyone know the average weight of a Ford Explorer? I know the Jeep weighs
5,975 lb., but I have to figure in the weight of the Ford to find out
accurately.
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
-----Original Message-----
From: Buck Savage <hhacker(a)home.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, April 05, 1999 3:19 PM
Subject: ABS - or is it Pure BS
>
>>2) even if the ABS system fails it still works just like non-ABS brakes.
>unless
>>the vacuum (power assisted) system fails or the brake line is cut, or
(very
>>unlikely) the piston sticks open, the brakes will work just fine.
>>
>
>
>ABS - American Bull Shi...
>
>I have noted one difficulty with ABS, and that is its failure to operate on
>snow
>and ice. Since I live in Southern California, I do not get that much snow
>but,
>in any quick application of my Mustang's breaks, on snow covered roads,
>they always seem to lock up. Well, the pumping action occurs but, at each
>application of the pump, I notice wheel lock-up. There is no stopping.
>
>William R. Buckley
>
>
-----Original Message-----
From: Eric Smith <eric(a)brouhaha.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, 6 April 1999 04:29
Subject: Re: bringing up an 8f...
>So in the context of this discussion about scanned documents, you're
saying
>that you either want them OCR'd or not at all?
No. Any form of document is preferable to none at all, if that is the
option.
I was simply stating a preference. It's not an ideal world, nor is
there an ideal solution.
>I've received complaints like that about my site. Fortunately I'm not
as
>thin-skinned as some people, or I might have simply removed the scanned
>images a long time ago.
Not from me. Anyone who takes the time to provide online docs in any
form has my gratitude.
Whether their method of choice or necessity is the one I like or not.
Kindest Regards
Geoff Roberts
>
Well, maybe, but the box of them that I had had no twist, hence would not
access drive1. Perhaps it wouldn't do drive 2 either. I certainly never
tried them because my need for these cable was for the connectors. I was
glad there were no twists because it meant I could use the cables less the
DC37 connector. They were useful as hard disk cables.
Dick
-----Original Message-----
From: Joe <rigdonj(a)intellistar.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, April 05, 1999 2:39 PM
Subject: Re: IBM 5150 PC disk drive questions
Jason,
The external cable had two connectors and a twist in it just like the
internal one.
Joe
At 01:29 PM 4/5/99 -0400, you wrote:
>According to the jumper settings on the 5150, it appears that 4 floppy
>drives can be connected to the computer. How is this possible? I'm
>guessing 2 internal, and two external, but there's only one connector for
an
>external drive, so it would only allow 3 drives.
>Or is there a special controller that has dual external ports?
>
>Any suggestions?
>
>ThAnX,
>--
> -Jason Willgruber
> (roblwill(a)usaor.net)
> ICQ#: 1730318
><http://members.tripod.com/general_1>
>
>
I once had a box of "External Drive" cables for a PC. These were terminated
in a DC37 at one end and had straight (no twist) cable to the two edge
connector sockets, ostensibly for drives 2,3,or 4. This arrangement
ostensibly allowed for up to four drives. Dual external ports certainly
wouldn't be needed with this arrangement.
Dick
-----Original Message-----
From: Jason Willgruber <roblwill(a)usaor.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, April 05, 1999 11:43 AM
Subject: IBM PC disk drive questions
>According to the jumper settings on the 5150, it appears that 4 floppy
>drives can be connected to the computer. How is this possible? I'm
>guessing 2 internal, and two external, but there's only one connector for
an
>external drive, so it would only allow 3 drives.
>Or is there a special controller that has dual external ports?
>
>Any suggestions?
>
>ThAnX,
>--
> -Jason Willgruber
> (roblwill(a)usaor.net)
> ICQ#: 1730318
><http://members.tripod.com/general_1>
>
>
>
>
>
>
<Alas it isn't... We're both right. The 8/e panel uses diode gates (in the
<maintenance manual, printset and the physical machine on my desk). The
<8/f uses TTL gates.
The last 8e pannel I worked with was also ttl. there may have been two
versions (very likely).
The offending part was a 74L54 with a bad input. It's now mostly up and
ready for more testing.
Allison
Still under DEC maintenance. No licences for transfer.
Specifications available on request.
--
Philip J. Tait.....AlliedSignal Engines, Phoenix, Az.....pjt(a)phxase.allied.com
