4 Nov
2016
4 Nov
'16
6:19 a.m.
Out of curiosity and ignorance what's with the solder joints on the cards in the
pictures? That orange color seems like it's everywhere around cold looking solder
joints. ?Is that rust, some sort or protection, or acid corrosion?
-------- Original message --------From: Mark G Thomas <Mark at Misty.com> Date:
10/31/16?
I had the pleasure of visiting Rick yesterday. Please see below
additional information about remaining items, with links to photos.
Please contact Rick directly if interested.
Original posting here:
On Tue, Oct 18, 2016 at 08:44:39AM +0000, steven stengel wrote:
---------------------------------------------------------------
*************? Contact Rick below if interested.? *************
---------------------------------------------------------------
Name: Rick Bunker
Contact: rick at bunker.us
Location: Jenkintown, PA???
10/30/2016 Update:----------------------
The Altair 8800, a very early one, 4-slot motherboard,
1K ram, ceramic CPU,
you will see: https://goo.gl/photos/3C1pzfwFoZ3koPgt9
4 Nov
4 Nov
7:22 a.m.
On Nov 4, 2016, at 9:19 AM, Sam O'nella
<barythrin at gmail.com> wrote:
Out of curiosity and ignorance what's with the solder joints on the cards in the
pictures? That orange color seems like it's everywhere around cold looking solder
joints. Is that rust, some sort or protection, or acid corrosion?...
> The Altair 8800, a very early one, 4-slot motherboard, 1K ram, ceramic CPU,
> you will see: https://goo.gl/photos/3C1pzfwFoZ3koPgt9
I doubt it's any of those. That's the typical look of a board hand-soldered with
conventional rosin core solder. While it's possible to remove that flux (thought I
think the best solvents are non-PC), it is often omitted and generally not needed.
paul
6 Nov
6 Nov
10:32 p.m.
On 11/4/16, 7:22 AM, "cctalk on behalf of Paul Koning"
<cctalk-bounces at classiccmp.org on behalf of paulkoning at comcast.net> wrote:
Yes, looking at those pictures that?s rosin.
On Nov 4, 2016, at 9:19 AM, Sam O'nella
<barythrin at gmail.com> wrote:
Out of curiosity and ignorance what's with the solder joints on the
cards in the pictures? That orange color seems like it's everywhere
around cold looking solder joints. Is that rust, some sort or
protection, or acid corrosion?...
> The Altair 8800, a very early one, 4-slot motherboard, 1K ram, ceramic
>CPU,
> you will see: https://goo.gl/photos/3C1pzfwFoZ3koPgt9
I doubt it's any of those. That's the typical look of a board
hand-soldered with conventional rosin core solder. While it's possible
to remove that flux (thought I think the best solvents are non-PC), it is
often omitted and generally not needed.
paul
4 Nov
4 Nov
3:50 p.m.
That is from the first 2000 to 5000 units its a 8800 no suffix the
ribbon is either A or Bsuffix and
a different CPU board (uses 8224).
The orange is rosin flux that was not cleaned. Isopropanol would clean
that but it was built as a
kit (the K suffux on the serial number tag). Its better to leave it
that way. Authentic, never cleaned
mine either.
The PS looks to be the original version or the first update (higher
voltage transformer).
I'd expect power supply problems, suspect one-shots (front panel and CPU
clock) and
bus level noise issues. Assuming the switches are still good.
Allison
On 11/04/2016 09:19 AM, Sam O'nella wrote:
Out of curiosity and ignorance what's with the
solder joints on the cards in the pictures? That orange color seems like it's
everywhere around cold looking solder joints. Is that rust, some sort or protection, or
acid corrosion?
-------- Original message --------From: Mark G Thomas <Mark at Misty.com> Date:
10/31/16
I had the pleasure of visiting Rick yesterday. Please see below
additional information about remaining items, with links to photos.
Please contact Rick directly if interested.
Original posting here:
On Tue, Oct 18, 2016 at 08:44:39AM +0000, steven stengel wrote:
---------------------------------------------------------------
************* Contact Rick below if interested. *************
---------------------------------------------------------------
Name: Rick Bunker
Contact: rick at bunker.us
Location: Jenkintown, PA
10/30/2016 Update:----------------------
> The Altair 8800, a very early one, 4-slot motherboard, 1K ram, ceramic CPU,
> you will see: https://goo.gl/photos/3C1pzfwFoZ3koPgt9
>
2750
days inactive
2753
days old
3 comments
4 participants
participants (4)
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ajp166＠verizon.net -
barythrin＠gmail.com -
geoffr＠zipcon.net -
paulkoning＠comcast.net