21 Aug
2007
21 Aug
'07
11:39 a.m.
Craigslist San Francisco has an "HP 250 vintage computer" listed for
$150 Post ID is 401790216.
Is anyone on-list familiar with this? Worth acquiring? or is it
fairly common gear?
Doesn't seem to be in bad shape, claims to be bootable and even has
some manuals but clearly missing the worktable and monitor.
I'm a newbie here so opinions welcome
s shumaker
21 Aug
21 Aug
2:46 p.m.
oi can't find it!
--- Steve Shumaker <shumaker at att.net> wrote:
Craigslist San Francisco has an "HP 250 vintage
computer" listed for
$150 Post ID is 401790216.
____________________________________________________________________________________
Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers
- Check it out.
http://answers.yahoo.com/dir/?link=list&sid=396545469
2:56 p.m.
it's gone... someone scored it
ss
At 02:46 PM 8/21/2007, you wrote:
oi can't find it!
--- Steve Shumaker <shumaker at att.net> wrote:
Craigslist San Francisco has an "HP 250
vintage
computer" listed for
$150 Post ID is 401790216.
____________________________________________________________________________________
Be a better Globetrotter. Get better travel answers from someone who
knows. Yahoo! Answers - Check it out.
http://answers.yahoo.com/dir/?link=list&sid=396545469
3:17 p.m.
nifty. http://www.sieler.com/hp250/. I'm afraid to ask
what one would find inside the beast in the way of
logic. I'm sure Tony Duell wouldn't know, so don't ask
him. Tee hee
But regarding early iron, did anyone grab the Wang
thing that was posted on here recently?
____________________________________________________________________________________
Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo!
Auto Green Center.
http://autos.yahoo.com/green_center/
8:47 p.m.
Chris M wrote:
nifty. http://www.sieler.com/hp250/. I'm afraid to
ask
what one would find inside the beast in the way of
logic. I'm sure Tony Duell wouldn't know, so don't ask
him. Tee hee
But regarding early iron, did anyone grab the Wang
thing that was posted on here recently?
____________________________________________________________________________________
Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo!
Auto Green Center.
http://autos.yahoo.com/green_center/
I just got home with the HP 250 shoved in the back of my wagon and saw
this thread.
It came with quite a bit of documentation which I have not yet gone
through. If there's
anything that's not on bitsavers, I'll get it to Al. Looks to be in
pretty good shape except
it's missing the monitor that was attached to the table top and the side
end of the table.
Did come with a remote terminal and keyboard which looks like the 2645
style, also a
spare 8" floppy drive and a bunch of cables.
I'll try and get some photos of it up on my web site this weekend.
Bob
10:06 p.m.
New subject: Gooey rollers again.
I picked up a nice Decision Data model 8010 keypunch machine through
govliquidation.
It looks to be in good shape EXCEPT some rollers have turned to goo.
They act just
like peanut butter, looks like it too. These are not simple round
rollers but are tapered,
and there are 16 of them in a complex arrangement. Any ideas on how to
fix them?
I guess I'm going to have to find some suitable plastic and turn them on
a lathe. Probably
beyond my ability.
Here are some photos:
http://www.dvq.com/oldcomp/photos2/1k/dd6.jpg
http://www.dvq.com/oldcomp/photos2/1k/dd7.jpg
Bob
22 Aug
22 Aug
3:49 a.m.
New subject: Gooey rollers again.
--- Bob Rosenbloom <bobalan at sbcglobal.net> wrote:
I picked up a nice Decision Data model 8010 keypunch
machine
Neat!
They act just
like peanut butter, looks like it too.
Mmmmm roller and jelly sandwich...
These are not
simple round
rollers but are tapered,
and there are 16 of them in a complex arrangement.
Any ideas on how to
fix them?
Ooh. Fun. I know a lot of people have had luck
replacing rollers by cleaning the gunk off the
existing core, and fitting neoprene tubing of the
proper diameter onto it. In this case, they're
tapered, so you'll have to do some shaping.
I guess I'm going to have to find some suitable
plastic and turn them on
a lathe. Probably
beyond my ability.
Not necessarily - you can probably get away with
replacing the rubber with a suitably thick walled
tubing (like neoprene tubing, or maybe rubber
automotive hose), and shaping it. Find a way to attach
a roller onto an electric drill, and grind it against
some sandpaper to shape it. You might even be able to
make some kind of tool - like a block of wood with the
shape of the roller taper cut into it, with sandpaper
or sanding screen attached. I've never had to make a
tapered roller, but it's worth a shot.
-Ian
2:23 p.m.
New subject: Gooey rollers again.
I picked up a nice Decision Data model 8010 keypunch machine through
govliquidation.
It looks to be in good shape EXCEPT some rollers have turned to goo.
They act just
like peanut butter, looks like it too. These are not simple round
rollers but are tapered,
and there are 16 of them in a complex arrangement. Any ideas on how to
fix them?
I guess I'm going to have to find some suitable plastic and turn them on
a lathe. Probably
beyond my ability.
Turning flixible materials is not easy, the darn stuff tends to distort
and not end up the size or shape you expect.
I've heard that cooling it to dry ice temperature helps. Liquid nitrogen
is too cold, the stuff then behaves like glass and just shatters.
Another posibility would be to make a mould and cast new parts using one
of the 2-part synthetic elastomers. The name 'Devcon' seems to ring a
bell for this, maybe a google search will find something. There's a book
entitled something like 'How to cast small metal and rubber parts' that
covers this, it's aimed at the classic car restoration gugs, but the
principles should be the same :-)
-tony
23 Aug
23 Aug
10:38 a.m.
New subject: Gooey rollers again.
Tony Duell <ard at p850ug1.demon.co.uk> wrote:>snip
Another posibility would be to make a mould and cast new parts using one
of the 2-part synthetic elastomers. The name 'Devcon' seems to ring a
bell for this, maybe a google search will find something. There's a book
entitled something like 'How to cast small metal and rubber parts' that
covers this, it's aimed at the classic car restoration gugs, but the
principles should be the same :-)
-tony
This is a great idea. I have used two part, rubber like, materials in the past. I found I
can buy new rollers for $35 each, much too expensive for all 16 needed. I'll probably
buy one and try to make a mold from it. I'll post the results.
Bob
12:39 p.m.
New subject: Gooey rollers again.
This is a great idea. I have used two part, rubber
like, materials in
the past. I found I can buy new rollers for $35 each, much too expensive
for all 16 needed. I'll probably buy one and try to make a mold from it.
I'll post the results.
I was thinking about mashining a mould from a block of metal and using that.
Be warened that, at least over here, those 2-part 'rubbers' are not
cheap. I think it was going to cost me over \pounds 100 for the rubber,
release agent and primer (the former to get it not to stick to the mould,
the latter to get it to stick to the hub or whatever). You are supposed
to mix the entire 500g of rubber in one go, after which you have 30
minutes to use it. If it doesn't work, you are supposed to buy a new kit,
costing over \pounds 30.
I've heard you can weigh out and mix part of the kit, though. But that
the shelf-life of the unmixed kit, once opened, is not that long (a
couple of weeks?). But long enough to let the mixed part cure overnight,
and if it didn't work, to try again.
-tony
22 Aug
22 Aug
2:18 p.m.
nifty. http://www.sieler.com/hp250/. I'm afraid to ask
what one would find inside the beast in the way of
logic. I'm sure Tony Duell wouldn't know, so don't ask
him. Tee hee
In which case I won't tell you that the main CPU seems to be one of those
HP BPC hybrid modules, similar to that used in the 9825, for example.
I'll also not tell you that there's a fair amount of documention,
including what seems to be a complete set of engineering drawings on the
Australian museum site, http://www.hpmuseum.net
-tony
6331
days inactive
6333
days old
10 comments
5 participants
participants (5)
-
ard＠p850ug1.demon.co.uk -
bobalan＠sbcglobal.net -
chrism3667＠yahoo.com -
ian_primus＠yahoo.com -
shumaker＠att.net