I have an old PS/2 Model 56 SLC Type 8556 which appears to have a 486 (upgrade?), 8 MB RAM, and 180 MB hard drive. There are also two FutureDomain MCA SCSI cards, and two MCA EtherPac 2100+NT cards. I don't know if any of the MCA cards are function,although I suspect the EtherPac cards are not because there's a crack in the C34 capacitors on both boards.
After replacing the system battery, it boots to DOS and also loads Windows 3.11.
I'm trying to decide what to do with it. I could send it off for e-waste recycling, but I wanted to check if any parts of it might actually be useful to someone.
I have an old PS/2 Model 56 SLC Type 8556 which appears to have a 486 (upgrade?), 8 MB RAM, and 180 MB hard drive.
two FutureDomain MCA SCSI cards,
After replacing the system battery, it boots to DOS and also loads Windows 3.11.
I'm trying to decide what to do with it. I could send it off for e-waste recycling, but I wanted to check if any parts of it might actually be useful to someone.
crack in the C34 capacitors on both boards
Some solid caps have a fine slit in them.
On 1/16/22 11:54 AM, Louis Ohland wrote:
Some solid caps have a fine slit in them.
I have always taken this to be a slit deliberately cut in some (few) >capacitors as a method of tuning them to be a specific value.
Either as close as possible to listed value, e.g. high precision, /or/
the value needed to properly tune a circuit, independent of the value
listed on the side of the capacitor.
On Sun, 16 Jan 2022 12:15:19 -0700, Grant Taylor
<gtaylor@tnetconsulting.net> wrote:
On 1/16/22 11:54 AM, Louis Ohland wrote:
Some solid caps have a fine slit in them.
I have always taken this to be a slit deliberately cut in some (few)
capacitors as a method of tuning them to be a specific value.
Either as close as possible to listed value, e.g. high precision, /or/
the value needed to properly tune a circuit, independent of the value
listed on the side of the capacitor.
They score capacitors so they will blow open easily instead of
exploding when they go bad and start swelling up.
OTOH sometimes they just melt. https://gfretwell.com/electrical/Blown%20cap%20SSR.JPG
I am not sure if the cap took the SSR or the other way around but it
was a smoky mess.
Are you talking about the components that look similar to a classic through-hole disc capacitor but with a precise slit cut into it from the top? These are spark gap capacitors. They are there to protect the
circuit from voltage spikes.
Often used in the frontend section of network adapters.
For example here (C7 next to the AAUI connector): https://www.ardent-tool.com/NIC/LAN_A_Old_Photo_Front.jpg
On 16.01.2022 21:40, gfre...@aol.com wrote:
On Sun, 16 Jan 2022 12:15:19 -0700, Grant Taylor <gta...@tnetconsulting.net> wrote:
On 1/16/22 11:54 AM, Louis Ohland wrote:
Some solid caps have a fine slit in them.
I have always taken this to be a slit deliberately cut in some (few)
capacitors as a method of tuning them to be a specific value.
Either as close as possible to listed value, e.g. high precision, /or/
the value needed to properly tune a circuit, independent of the value
listed on the side of the capacitor.
They score capacitors so they will blow open easily instead of
exploding when they go bad and start swelling up.
OTOH sometimes they just melt. https://gfretwell.com/electrical/Blown%20cap%20SSR.JPG
I am not sure if the cap took the SSR or the other way around but it
was a smoky mess.
I'm in the Midwest United States. I'd be willing to ship it, although I'm
not sure of the best method to do it. I'd forgotten how heavy the thing
is, so I'm curious what's the best way to protect it during shipping.
Also, I vaguely remember that old drives didn't auto-park the heads,
you needed to run some sort of utility before shipping to prevent
damage. Any idea on if I'll need to do that in this instance?
I'm in the Midwest United States. I'd be willing to ship it, although I'm not sure of the best method to do it. I'd forgotten how heavy the thing"The Midwest" is still a big area - can you pin it down to the state?
is, so I'm curious what's the best way to protect it during shipping.
Also, I vaguely remember that old drives didn't auto-park the heads,Nope, the drive is SCSI...
you needed to run some sort of utility before shipping to prevent
damage. Any idea on if I'll need to do that in this instance?
On Monday, January 17, 2022 at 2:28:07 AM UTC-5, IBMMuseum wrote:
Douglas,I'm in the Midwest United States. I'd be willing to ship it, although I'm not sure of the best method to do it. I'd forgotten how heavy the thing is, so I'm curious what's the best way to protect it during shipping."The Midwest" is still a big area - can you pin it down to the state?
Also, I vaguely remember that old drives didn't auto-park the heads,Nope, the drive is SCSI...
you needed to run some sort of utility before shipping to prevent
damage. Any idea on if I'll need to do that in this instance?
Stores like Staples and UPS will properly box up the computer for you and ship it. I live in Albany, NY, so picking it up will not be an option. I can be reached at my FireFox mail address directly: 6mqx...@relay.firefox.com
I can pay you via PayPal.
On Monday, January 17, 2022 at 2:28:07 AM UTC-5, IBMMuseum wrote:Hello from Ravena NY!
Douglas,I'm in the Midwest United States. I'd be willing to ship it, although I'm not sure of the best method to do it. I'd forgotten how heavy the thing is, so I'm curious what's the best way to protect it during shipping."The Midwest" is still a big area - can you pin it down to the state?
Also, I vaguely remember that old drives didn't auto-park the heads,Nope, the drive is SCSI...
you needed to run some sort of utility before shipping to prevent
damage. Any idea on if I'll need to do that in this instance?
Stores like Staples and UPS will properly box up the computer for you and ship it. I live in Albany, NY, so picking it up will not be an option. I can be reached at my FireFox mail address directly: 6mqxyvtzb@relay.firefox.com
I can pay you via PayPal.
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