anyone recognize this puppy?
yup.. ANSI 8" interface
I was VERY happy someone outbid me on it when I discovered what
If someone has a paper copy of the X3.101 spec, i'd like to add
it to the archives on spies.
It appears to be based on the Shugart/Quantum 8" drive standard
but on a single 50 pin connector instead of a 50 and 26.
Anybody looking for these? I was at Computer Recycling & Refining in
North Branford, CT today. Not a bad place. About 2000 square feet. And a
bunch of stuff. Two interesting things I saw were a "Woz" signed IIgs
(?) and a Dynabyte computer. According to the guy there, it was the
first portable? Considering it's about the size of a couple mid-tower
PCs, it's not really that portable... Either way, both are for sale.
Give them a call, 203-488-0535.
If you looking for some other PC or Mac computers or parts (pallets),
maybe some HP switched hubs (at least 1 pallet), or even a couple large
Cisco Catalyst 5500 units; they may be able to help you out. They
welcome visitors, just call in advance...
Heisenberg says we can't know the speed of <thing> and it's location at
the same time.
What if I concentrate on location while timing <thing>
ie <thing> is at "5" and 1 second later it's at "35" is it not going
"30" per second?
and while it was going 30 per second didn't I see it at 5 and 35?
(note to a real physicist this question is probably meaningless...)
On Oct 31, 14:23, Patrick Finnegan wrote:
> > Looks like it. If you've tried two terminators and two
> > all that's left is the cable or the drive. I assume you've got the
> > ribbon cable from the controller to the bulkhead connector round
> > right way.
> Hmm, right that's one thing I'm not too sure about... the cable is
> straight-thru, right? I'm using a makeshift cable (one of a couple
> tried), and it's straight-thru, because I was assuming the 'real'
cable is as
> well. Sometime today I'll try to look to see if there's anything too
> that's wrong (eg missing 4MHz clock signal).
Yes, it is straight-through. One of mine has 8" of old 40-pin ribbon
cable from an Acorn 2nd Processor, vintage 1985 or so, and it works
fine. The back of the bulkhead connector is just a dual row of pins on
0.1" centres, and an ordinary female header fits perfectly. Of course,
depending on which way up you have the bulkhead connector, you might
need a half-twist in the ribbon cable.
Pete Peter Turnbull
University of York
I unsubscribed from this list because of the volume,
but I still read the monthly archives. I noticed than
some people were wondering about the HP CRT mold
problem. I really did solve it, by building a wooden
box (to contain the IMPLODING crt), and mounting the
CRT in it. Then, I went to the hobby store and got
some nichrome wire used in cutting foam for model
airplanes. I used an old AT power supply at 12 volts
to power the wire, to just below red hot (I determined
the length of nichrome wire to do this with
expermentally, it was about 3.5 feet). I made wooden
handles with screws to hold the wire as I sliced
through (very slowly!!!) the old RTV, keeping the
nichrome wire towards the front glass and not touching
the CRT. after the front glass came off, acetone was
used to remove the remaining old RTV, and all glass
surface were cleaned spotless before reassembly with
aquarium RTV around the edges. Of course, this was all
VERY VERY hazardous and no SANE person should EVER
even CONSIDER doing this (liability issues...).
I completely restored my 2644A including getting both
tape drives working, good matching paint, and I even
buffed the yellowing keys back to original condition
(very tedious work). But it is an amazing, cost is not
object machine. The switching power supply is crystal
My tube didn't have very serious phosphor burns so I
felt that it was worth this effort.
If anyone wants the CRT box they can have it for the
cost of shipping. Hope I won't have to use it again!
You actually can buy NEW crt's like this one - for
$250!!! I also put new CRT's in my ADM-3a's (much
cheaper, around $45 shipped, as I recall).
Some details on the HP and ADM-3a CRT replacements are
I've been working on 6120's, tiny paper tape readers
powered by laptop power supplies, and a Scelbi clone
capable of running SCELBAL (which I have resurrected).
Incredible wisdom actually found in a commerical fortune cookie:
"When small men cast long shadows, then it is very late in the day."
Do you Yahoo!?
Exclusive Video Premiere - Britney Spears
I use to have before the fire, a box full of about 50 different 3 1/2's
My eon's ago i was responsible for evaluating 3 1/2's for Tektronix.
Three different types, and you should have seen all the rev's Sony
The part I remember the most is the convincing the now loosing camps
use to try to put down the Sony design.
I'll see if I still have some of the doc's and such, if i do, I'll put
them on a web site.
From: Curt vendel [mailto:firstname.lastname@example.org]
Sent: Monday, October 27, 2003 7:32 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: vintage 3.5" disk drives
Did Seagate and/or Shugart get into making 3.5" floppy disk drives
83/84??? Anyone have pics of very early 3.5" disk drives?
I recently won an auction described as a "Science Fair Junior
Electronic Lab 10 in 1"... the picture showed a couple of
blue grid boards which were, AFAIK, not part of a 10-in-1
It turns out that in addition to the 10-in-1, there was
an entire (and a partial) "Science Fair Junior Project
Board Kit" (cat no. 28-153) - one manual, two plug boards,
one IC board (14-pin socket + 14 springs) plus a double
handful of mixed loose components.
The components are somewhat interesting from a historical
perspective - there are several flavors of transistor sockets,
several segmented LED displays (some on PCBs as from an LED
calculator, some in DIP form), mercury switches, reed switches,
and a bag of resistors with a "King Kits" card from Poly Paks.
I'm curious if there's a repository of ancient Radio Shack kit
manuals out there - I did not get a manual for the 10-in-1
(cat no. 28-225), but at least I got its box (covered in packing
The New Yahoo! Search - Faster. Easier. Bingo
I am trying to set up a Black Box '20ma loop to serial' converter box on
an existing, known working 20ma loop which currently drives a couple of
There is a note in the black box manual that the device won't work on
analog current loop. Am I correct in assuming that an analog current loop
is one where an analog instrument is sending its 'telemetry' over the
loop? A 20ma loop terminal obviously would not fit into that category I
The folks I am working with seem to have tried the obvious. They only
want the black box device to receive data so they have hooked on the
appropriate wires so far no output. Any obivous gotcha's with this