Hi Bryan
It is a type of silicon grease ( NOT heat sink grease ).
It is not really a cleaner but unlike petroleum grease,
it has vary low film strength. In other words, it is
a poor lubricant. When the contacts scrape together,
surface oxides are scraped off and the grease protects
the new surface from degrading because of air contact.
There are similar products sold through hi-fi shops
but I've been using DC#4 ( Dow Corning #4 ) for a long
time and trust it. You can get it at many electric
shops ( you know lighting and wiring ) as well as
mail order, like McMaster-Carr.
In a pinch I've had good luck with automotive products
like SilGlyde grease and other dielectric greases.
It is good for most any electrical connector since it
is non-conductive. It works best on connection that carry
High current, like power supply connectors. It also works
well on connectors that have vibration issues, like the
RAM pack connected to the back of a Sinclair ZX81.
It does lubricate slightly so one should make pins on
things like EPROMs at 90 degrees relative to the package,
so they don't have spring tension that tend to pop them
out of the sockets. This is probably a good idea to do
with plastic ROM packages as well for reliability reasons.
Stressed pins, from automatic insertion methods, tend
to increase the likelihood of pin to chip failure.
Dwight
>From: "Bryan Pope" <bpope at wordstock.com>
>
>And thusly Dwight K. Elvey spake:
>>
>> Hi
>> I'll make my standard comment here. Putting
>> DC#4 or similar materials onto pins before
>
>DC#4? What is that? Some sort of contact cleaner?
>
>Cheers,
>
>Bryan
>
>
>> putting things back together will make a difference.
>> This is especially true for the power pins that
>> would otherwise tend to over heat because of
>> contact resistance.
>> Dwight
>>
>>
>>
>
>
Chris,
Checked out the multibus cards.
I have:
4 IAPX86 cards (8086-2, 512k ram, 8255, serial 8251 and timer.)
1 512k parity ram
These were from a MDS 800 someone did a disassembly and scrap on.
1 backplane from MDS800 spare
1 Monitor board from same
1 frontpannel board from same.
Allison
>
>Subject: offlist Re: Looking for: BCC180 schematics and..
> From: Chris M <chrism3667 at yahoo.com>
> Date: Thu, 29 Sep 2005 08:05:45 -0700 (PDT)
> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org>
>
>That sounds like something that was published in Byte
>years ago. As a matter of fact I'm pretty positive.
>Mostly definate. 99% anyway. Provided I have it, would
>that solve your problem?
>
>--- Allison <ajp166 at bellatlantic.net> wrote:
>
>> I'm looking for schematics for MicroMint BCC180
>> rev1.
>>
>> Also Imagewise V2.0 reciever (ca1987) the earlier
>> with DB25
>> connector. Any docs or schematic would help.
>>
>> Allison
>>
>
>
>
>
>__________________________________
>Yahoo! Mail - PC Magazine Editors' Choice 2005
>http://mail.yahoo.com
Anyone have any information about this computer? It's a small RUGGED
laptop. It's even beefier than the Grids. Here's a bit of general info
about them but I'd like more specific info on the model RLT-88.
Joe
We (my company) do a lot of business with an IBM dealer/reseller in
San Antonio, TX. Their systems guy sent me this spreadsheet the other
day listing *all* the RS6k/pSeries models, basic system info, supported
AIX versions, etc. It's not very detailed, but it's the first really
complete and coherent listing of models I've ever seen (yes, including
the telco variants and switches). He told me this morning I can share it.
Sorry about the Excel format. I didn't make it and I haven't had
time to export it to something more universal.
http://www.docsbox.net/RS6000_Ref.xls
Doc
Well, it would also help if you told us what version (model) of the ST20 it
is?
Is it the ST20450 (a true transputer model) or the later stripped down
sequential versions. What tools are you using (compilers, etc)...
Thanks,
Ram
> -----Original Message-----
> From: Brad Parker [mailto:brad at heeltoe.com]
> Sent: Thursday, September 29, 2005 10:28 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: transputers
>
>
>
> Ram Meenakshisundaram wrote:
> >Come to my website at http://www.classiccmp.org/transputer.
> I havent
> >set up a ST20 site yet, but what are you looking for?
> Datasheets, etc,
> >etc..
>
> Mostly just experiences with writing asm code for them...
> speed tips, etc...
>
> -brad
>
All,
On 9/30/05, Zane H. Healy <healyzh at aracnet.com> wrote:
[...]
> As for the Acorn, did it ever get exported anywhere?
The Acorn made it to Australia in small numbers. It was not hugely
visible. I only really know about them through a friend. I think he
gained his knowledge through his school. Most schools had BBC Micros
or Micro Bees before digressing into Wintel territory. It is a shame
as I am lead to believe that the Acorn architecture and OS where well
engineered.
[...]
Simon
--
------------------------------------------------------------------------
"Well, an engineer is not concerned with the truth; that is left to
philosophers and theologians: the prime concern of an engineer is
the utility of the final product."
Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh
> Sellam said:
>
> Grrr, I hate bringing up old topics, but I can't find anything in the
> archives or on Google
>
> I'll be shipping an ASR32 and want to lock the typing unit. I've seen a
> message from Tony mentioning a "transit screw" that secures the typing
> unit to the base.
>
> Can anyone elaborate?
If you look on the outside of the case under the bottom of the keyboard,
you will see a hole. You can put a bolt of the correct length and thread size
through the hole and it will screw into a hole on a metal part of the tty
inside the case. I had an ASR33 shipped with the shipping bolt in place
and it worked fine when it arrived at my place. I have had another one
that was shipped without the shipping bolt and something inside seems to
be out of alignment and the keyboard isn't working.
Ashley
Grrr, I hate bringing up old topics, but I can't find anything in the
archives or on Googl.e
I'll be shipping an ASR32 and want to lock the typing unit. I've seen a
message from Tony mentioning a "transit screw" that secures the typing
unit to the base.
Can anyone elaborate?
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
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> HI Ashley, the 33ASR you mentioned is actually a TWX machine if it has a
> phone dialer option & it has 4 rows of keys on the keybd. The "H" lever is
> probably out of it's slot, causing the keybd. not to reset. I would start there.
> Larry
Larry, I think these ASR-33s were set up as TWX machines. They can also
be set up as computer terminals, can't they? Aren't all the mechanics, etc.,
the same except for the telephone stuff and the modem stuff that's in the
stand?
Thanks for the info. I'll take a look at the H Lever.
Ashley
It also doesn't help when there are about 5 people who are vigourous
collectors of transputer stuff (that includes me). This drives the prices
up into un-precedented levels. 3 out of the 5 collectors are unbelievably
ruthless (that excludes me) when it comes to acquisition on ebay. This
makes it difficult for anyone else to obtain one. The large transputer
equipments (that are found in universities) is a good place to look, but
also a bit difficult at times unless you know someone there.
Ram
> -----Original Message-----
> From: Jules Richardson [mailto:julesrichardsonuk at yahoo.co.uk]
> Sent: Friday, September 30, 2005 10:28 AM
> To: On-Topic and Off-Topic Posts
> Subject: Re: transputers
>
> Local universities are worth a try - many would have had transputer
> equipment back in the day, and it may well still be lurking
> in a cupboard...
>
> cheers
>
> Jules
>
