I like the machined sockets but they are just too expensive to use
everywhere.
I use the machine sockets for things like CPU, RAM, EPROMS, and crystals.
The AMP double swipe are best (IMHO). I still have a bunch of no-name
(maybe chinese)
that are not so good. You can definitely see/feel the difference. I've
had issues with one
of the double swipe pins get bent and no longer make contact. Sometimes
you can cheat
it back in place. The cheap sockets have very thin and fragile pins. If
they get bent, bending it
back can break it.
Funny Josh that you've been able to repair sockets by extracting one
pin. I've done this as well.
Also the cheaper sockets seem to have more plastic in them and don't
take a lot of heat well, so
doing a pin replacement may not work as well.
Moral: You get what you pay for. :^)
On 12/ 2/14 05:55 PM, Richard Cini wrote:
Josh —
Yes, definitely AMP sockets.
There seems to be two serial numbers. On the bottom-right corner next
to the “Serial No.” legend, there is a black stamp with the number
“520650”. Then, perpendicular to that number, engraved into the ground
trace along the right-hand edge, is the number “4631”.
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.classiccmp.org/cini
http://www.classiccmp.org/altair32
From: Crusty OMO <[email protected] <mailto:[email protected]>>
Reply-To: S100-Post <[email protected]
<mailto:[email protected]>>
Date: Tuesday, December 2, 2014 at 8:11 PM
To: S100-Post <[email protected]
<mailto:[email protected]>>
Subject: RE: [N8VEM-S100:5730] Re: EPROM/RAM board
Thanks Rich,
Ahh, so they are like the popular Amp Sockets, I like those. You can
see if the metal contacts are deformed (which might happen if
something thicker than an IC pin was inserted into them). I was wrong
about my sockets, only some are the RW type, the others are
single-wipe (still cheap) sockets. See pics below. The AMP socket is
just for reference, I laid it on top an old board for a nicer back
ground. But you can see at the bottom of each pin how the dual-wipes
meet each other. If the metal wipes don't meet each other, then the
socket is damaged. I have in the past even repaired a socket in place
by removing the whole pin from the top and replacing with a one from
another socket.
Re SSM IO4, Interesting to see they are using different sockets...
what's the serial number on your card, I wonder if mine is an earlier
build and they moved to the better sockets... or it could be the other
way around, mine might be a later build and they moved to cheaper
sockets? On second thought, I guess it doesn't really mean much.
Re Your problems, I understand the kids aren't getting along. I've
been so busy with designing and VCF shows that I haven't had any time
to build anything lately. The last project I built was your 65C02
board (where I learned the "C" matters). Well, hopefully, I'll be
able to see my bench after World of Commodore show this weekend.
Cheers, Josh
------------------------------------------------------------------------
Date: Tue, 2 Dec 2014 19:27:35 -0500
Subject: Re: [N8VEM-S100:5728] Re: EPROM/RAM board
From: [email protected] <mailto:[email protected]>
To: [email protected] <mailto:[email protected]>
Josh —
No, this board is rock-solid. I have several and use them on every
system I have. The other one I like is the Interfacer I.
The model I have on this test system uses double-wipe sockets, not the
enclosed ones you describe. I’m just having problems with it and the
16-bit CPU (8088) board).
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.classiccmp.org/cini
http://www.classiccmp.org/altair32
From: Crusty OMO <[email protected] <mailto:[email protected]>>
Reply-To: S100-Post <[email protected]
<mailto:[email protected]>>
Date: Tuesday, December 2, 2014 at 7:01 PM
To: S100-Post <[email protected]
<mailto:[email protected]>>
Subject: RE: [N8VEM-S100:5727] Re: EPROM/RAM board
Rich, have you ever had any problems with your SSM IO4? I mentioned
recently that mine was causing ghost characters, fixed after reseating
the chips. I should also note that it had another problem 2 years ago
when I first started using it (while bringing the IMSAI back to
life). It would seem to work fine, then after sending a large stream
of characters to the Terminal (all correctly) it would send the last
character a few extra times... kind of like a car engine with run on.
It was funny to watch... because it would eventually stop, but it
slowed down first. Just like engine run on... first it sputters, then
it dies after 1 or 2 last kicks.
I never did find the exact cause (at the time, I was getting tired of
fixing everything else that had gone bad on the IMSAI), but it did
correct it self after reseating the chips.
I am particularly interested in what type/make of sockets are on your
board... I believe all of mine are "RW". Contacts are hidden, open
frame type sockets.
Cheers,
Josh
------------------------------------------------------------------------
From: [email protected] <mailto:[email protected]>
Subject: Re: [N8VEM-S100:5726] Re: EPROM/RAM board
Date: Tue, 2 Dec 2014 10:51:50 -0500
To: [email protected] <mailto:[email protected]>
Welcome back!
No. I don't think the right schematics and board plots are posted for
that version.
Right now I'm building the Prop IO board. I can't get the 8088 board
working with my vintage Solid State Music IO4 board (which works fine
with the z80 board). I also can't seem to get the right jumpers for
master mode.
Sent from my iPhone
On Dec 2, 2014, at 10:38 AM, John Monahan <[email protected]
<mailto:[email protected]>> wrote:
Rich, I’m back in CA . Did you get that RAM/ROM board version
number straightened out?
John
*From:*[email protected]
<mailto:[email protected]>
[mailto:[email protected]] *On Behalf Of *monahanz
*Sent:* Saturday, November 22, 2014 2:22 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [N8VEM-S100:5659] Re: EPROM/RAM board
The problem Rich is I'm in Paris currently and am working from
memory. Will not be back in CA until Dec 1st but it sounds like
you are correct. I will review the files when I get back.
John
On Friday, November 21, 2014 7:56:53 PM UTC-8, AltairManRich wrote:
All —
I was going to build the EPROM/RAM board this weekend but I
noticed that there are several versions of the board. Mine
says “4213” by the UL designation in the upper-left corner and
has “Version 01” in the lower-right corner. It also has a coin
cell battery holder on it.
This version doesn’t match any of the pictures on the Web site
so before I built it, I wanted to confirm it was a good
version. If not, I guess I should get another one from Ed
Snider (I think).
Thanks!
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.classiccmp.org/cini
http://www.classiccmp.org/altair32
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