30 Mar
2002
30 Mar
'02
3:06 p.m.
If I recall correctly, IBM had a special stand for the PS/2 Model 77 so
that it would sit on it's side. Does anybody have one they want to get
rid of? I have one for a generic PC but it doesn't quite fit the PS/2
correctly.
I've almost got my new 9577 reassembled...... been cleaning it :-)
Chad Fernandez
Michigan, USA
30 Mar
30 Mar
3:55 p.m.
New subject: Sierra Semiconductor Internal Modem
I got an interesting box of Sierra Semiconductor 2400 boards, etc. today
at the TRW swap meet. From what I can find using Google, Sierra only
made chipsets. But this set of stuff includes unstuffed boards with
"Sierra Semiconductor Corporation", "2400 Internal Modem", TTI
Copyright
1987" on them. There are several packages of chips, crystals, etc. along
with relays and transformers that appear to be most of the parts for
stuffing these things. I'll just add this stuff to my collection of
modems, but I thought this stuff was rather interesting!
31 Mar
31 Mar
3:36 a.m.
New subject: Sierra Semiconductor Internal Modem
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4:08 a.m.
New subject: Sierra Semiconductor Internal Modem
Tony Duell wrote:
I have far too many projects going, so unfortunately, it just isn't fun
anymore. That is one of the reasons I am starting to sell/give/toss off
some of the extra stuff. But I think an evaluation board is something of
historical interest and worthwhile preserving. I'll most probably try
and get the schematics & parts list to see if I have any complete
unbuild boards & major parts. At that point, I'll keep one and make the
others available to anyone who would like one of these things. It may
take a year or so though!
I got an interesting box of Sierra Semiconductor
2400 boards, etc. today
at the TRW swap meet. From what I can find using Google, Sierra only
made chipsets. But this set of stuff includes unstuffed boards with
"Sierra Semiconductor Corporation", "2400 Internal Modem", TTI
Copyright
It sounds like you may have found some modem evaluation kits. Did you
get any documentation with them (like PCB layouts or schematics)? If not,
stuffing these things. I'll just add this
stuff to my collection of
modems, but I thought this stuff was rather interesting!
You mean you're not going to assemble one of the boards just for fun :-( 
2:01 p.m.
New subject: Sierra Semiconductor Internal Modem
On Sun, 31 Mar 2002, Marvin Johnston wrote:
I have far too many projects going, so unfortunately,
it just isn't
fun anymore. That is one of the reasons I am starting to
sell/give/toss off some of the extra stuff. But I think an evaluation
board is something of historical interest and worthwhile preserving.
I'll most probably try and get the schematics & parts list to see if I
have any complete unbuild boards & major parts. At that point, I'll
keep one and make the others available to anyone who would like one of
these things. It may take a year or so though!
I ended up with several built prototype 2400 baud modems from a auction a
number of years ago. If you have the time to put up some detailed pictures
of your kits, I'll start looking for the box that I put them in to see if
one of them matches your kits.
The auction I bought them from was a bankruptcy auction for a small
prototype and design company. I bought up most all of the components
except for a couple cabinets of modern TTL/CMOS chips and around 10,000 or
so gold plated prototype PLCC chips. A couple of students overbid the
TTL/CMOS lots, and I think a scrapper bought up the prototype PLCC chips.
(I did end up with _all_ the sockets...) I also ended up with a few of
those PLCC prototype chips mixed in the cabinets I bought. Two of those
chips don't have their lids installed, so the die or bonding wires are
probably damaged by now. (Anyone know how to take a picture of those?) I
seem to remember a former employee bought up all the die masks for their
custom chips, I guess for nostalgia reasons. I'm *still* sorting the
components I bought, and have run out of available parts cabinets (again).
There was also a bench type micro-manipulator in that auction. It had all
the goodies including stuff to install bonding wires in chips. I think
someone bid around $8-10,000 for it.
-Toth
8074
days inactive
8075
days old
4 comments
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participants (4)
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ard＠p850ug1.demon.co.uk -
fernande＠internet1.net -
marvin＠rain.org -
tothwolf＠concentric.net