8 Jul
2016
8 Jul
'16
6:49 p.m.
Hi,
for rebuilding a circuit, I'm in need of 3 old connectors used on the
original board.
######################
One is easy - J3 is a 2x10 pin 2.54mm connector which is still common today.
But it is higher than the usual connectors. It has a hight of 1.5cm. If you
search for the printed A-MP number (1-87456-6), you'll find the housing,
but not the soldered clips used inside this housing....
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
######################
The next one is a power plug used on a CDC FINCH harddisk. The manual
states, that the Connectors AMP 1-87270-1 or 3-87025-3 can be used.
I guess this where connectors used with cables - but I need a connector
which can be placed on a circuit board like this one:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
######################
The next one is also a power plug - but I have no idea about its AMP
number or something:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
Its counterpart is shown here and labled with AMP, but no number:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_case/Disk-Tape-Component…
Any info on any of this connectors would be great...
Regards, Oliver
9 Jul
9 Jul
8:21 a.m.
On Sat, 9 Jul 2016, Oliver Lehmann wrote:
Hi,
for rebuilding a circuit, I'm in need of 3 old connectors used on the
original board.
######################
The next one is also a power plug - but I have no idea about its AMP
number or something:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
Its counterpart is shown here and labled with AMP, but no number:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_case/Disk-Tape-Component…
The header on the board appears to be a Molex KK 396 series header. The
plug on the wiring harness is an AMP MTA-156 series IDC connector. I'm not
sure why they mixed and matched connectors, but they both use the same
size pins with .156" spacing. The Molex header might retain the plug
better than the AMP header due to the friction lock.
Molex 26-60-5100 KK 396 Header, Right-Angle with Friction Lock, 10
Circuits, Tin (Sn) Plating
http://www.molex.com/molex/products/datasheet.jsp?part=active/0026605100_PC…
http://www.molex.com/pdm_docs/sd/026605100_sd.pdf
http://www.molex.com/webdocs/datasheets/pdf/en-us/0026605100_PCB_HEADERS.pdf
AMP 640389-0 MTA-156 Friction Lock Headers - Right Angle front bend, .125"
solder tail
http://www.te.com/usa-en/product-1-640389-0.html
http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&am…
10:02 a.m.
The Molex version looks like it has round pins; I'd recommend rectangular
pins with your matching connector, they're prone to overheat at the best of times.
m
----- Original Message -----
From: "Tothwolf" <tothwolf at concentric.net>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Sent: Saturday, July 09, 2016 8:21 AM
Subject: Re: Looking for old connectors
On Sat, 9 Jul 2016, Oliver Lehmann wrote:
Hi,
for rebuilding a circuit, I'm in need of 3 old connectors used on the
original board.
######################
The next one is also a power plug - but I have no idea about its AMP
number or something:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
Its counterpart is shown here and labled with AMP, but no number:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_case/Disk-Tape-Component…
The header on the board appears to be a Molex KK 396 series header. The
plug on the wiring harness is an AMP MTA-156 series IDC connector. I'm not
sure why they mixed and matched connectors, but they both use the same
size pins with .156" spacing. The Molex header might retain the plug
better than the AMP header due to the friction lock.
Molex 26-60-5100 KK 396 Header, Right-Angle with Friction Lock, 10
Circuits, Tin (Sn) Plating
http://www.molex.com/molex/products/datasheet.jsp?part=active/0026605100_PC…
http://www.molex.com/pdm_docs/sd/026605100_sd.pdf
http://www.molex.com/webdocs/datasheets/pdf/en-us/0026605100_PCB_HEADERS.pdf
AMP 640389-0 MTA-156 Friction Lock Headers - Right Angle front bend, .125"
solder tail
http://www.te.com/usa-en/product-1-640389-0.html
http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&am…
10:18 a.m.
On Sat, 9 Jul 2016, Mike Stein wrote:
From: "Tothwolf" <tothwolf at
concentric.net>
Both the Molex and AMP/Tyco headers above have square pins. I use both
series and have them in my inventory. Round pin .156" (3.96mm) headers
have been discontinued for years due to that very issue. The flat contacts
used in the connector shells don't make good contact with round pins since
it offers less surface area than a square pin. As they age and oxidize, it
gets even worse. I routinely replace older .156" round pin headers with
modern square versions as preventative maintenance when I
service/refurbish boards.
On Sat, 9 Jul 2016, Oliver Lehmann wrote:
The Molex version looks like it has round pins; I'd recommend
rectangular pins with your matching connector, they're prone to overheat
at the best of times. Hi,
for rebuilding a circuit, I'm in need of 3 old connectors used on the
original board.
######################
The next one is also a power plug - but I have no idea about its AMP
number or something:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
Its counterpart is shown here and labled with AMP, but no number:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_case/Disk-Tape-Component…
The header on the board appears to be a Molex KK 396 series header. The
plug on the wiring harness is an AMP MTA-156 series IDC connector. I'm not
sure why they mixed and matched connectors, but they both use the same
size pins with .156" spacing. The Molex header might retain the plug
better than the AMP header due to the friction lock.
Molex 26-60-5100 KK 396 Header, Right-Angle with Friction Lock, 10
Circuits, Tin (Sn) Plating
http://www.molex.com/molex/products/datasheet.jsp?part=active/0026605100_PC…
http://www.molex.com/pdm_docs/sd/026605100_sd.pdf
http://www.molex.com/webdocs/datasheets/pdf/en-us/0026605100_PCB_HEADERS.pdf
AMP 640389-0 MTA-156 Friction Lock Headers - Right Angle front bend, .125"
solder tail
http://www.te.com/usa-en/product-1-640389-0.html
http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&am…
12:37 p.m.
On 07/09/2016 09:18 AM, Tothwolf wrote:
On Sat, 9 Jul 2016, Mike Stein wrote:
> From: "Tothwolf" <tothwolf at concentric.net>
>> On Sat, 9 Jul 2016, Oliver Lehmann wrote:
>>
>>> Hi,
>>>
>>> for rebuilding a circuit, I'm in need of 3 old
>>> connectors used on the
>>> original board.
>>
>>> ######################
>>>
>>> The next one is also a power plug - but I have no idea
>>> about its AMP
>>> number or something:
>>>
>>>
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
>>>
>>>
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
>>>
>>>
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
>>>
>>>
These connectors are also available with gold contacts on
both ends. For long-term reliability, these are better.
Jon
8:49 p.m.
On Sat, 9 Jul 2016, Jon Elson wrote:
On 07/09/2016 09:18 AM, Tothwolf wrote:
For lower voltage signal applications, yes. For supplying power, no.
Both contact surfaces must also be the same material or tin oxide will
form on the surface of the gold plating and cause a major headache. This
was a serious problem with 486 and earlier Pentium PCs with 30 and 72 pin
SIMMs and it led to a number of lawsuits.
On Sat, 9 Jul 2016, Mike Stein wrote:
> From: "Tothwolf" <tothwolf at concentric.net>
>> On Sat, 9 Jul 2016, Oliver Lehmann wrote:
>>
>>> Hi,
>>>
>>> for rebuilding a circuit, I'm in need of 3 old connectors used on the
>>> original board.
>>
>>> ######################
>>>
>>> The next one is also a power plug - but I have no idea about its AMP
>>> number or something:
>>>
>>>
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
>>>
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
>>>
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
>>>
These connectors are also available with gold contacts on both ends.
For long-term reliability, these are better. 
12:52 p.m.
Mike Stein wrote:
The Molex version looks like it has round pins;
I'd
recommend rectangular pins with your matching connector,
they're prone to overheat at the best of times.
Ya' know, I have heard that several times, but I have
eight different Ohio Scientific systems and a couple of
SWTPc machines (all of which make extensive use of those
Connectors) and I've never seen any evidence of heating.
Poor/glitchy data communication, yes. But never any
heating on them.
Bill S.
10 Jul
10 Jul
4:12 a.m.
Thanks for your help so far - I was able to find them at mouser:
One is easy - J3 is a 2x10 pin 2.54mm connector which
is still common today.
But it is higher than the usual connectors. It has a hight of 1.5cm. If you
search for the printed A-MP number (1-87456-6), you'll find the housing,
but not the soldered clips used inside this housing....
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
found:
Connectors:
http://www.mouser.de/Search/ProductDetail.aspx?R=87523-6
Housing:
http://www.mouser.de/Search/ProductDetail.aspx?R=1-87456-6
The next one is a power plug used on a CDC FINCH
harddisk. The manual
states, that the Connectors AMP 1-87270-1 or 3-87025-3 can be used.
I guess this where connectors used with cables - but I need a connector
which can be placed on a circuit board like this one:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
found:
http://www.mouser.de/Search/ProductDetail.aspx?R=26-60-5100
The next one is also a power plug - but I have no idea
about its AMP
number or something:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
Its counterpart is shown here and labled with AMP, but no number:
http://pics.pofo.de/gallery3/index.php/S8000/S8000_case/Disk-Tape-Component…
Found too without keying pin but this is not important as I don't need one.
The thing is - the connectors in my housing on the board are kinda
simpl. The ones
at mouser seem to be kinda complex with some sort of locking mechanism
- I'm not
sure I need those, but I'm not able to find simpler ones. Maybe the
locking spring
can be removed by me before installing them in the housing? I need to
be sure that
I can remove the board from the harddisk without such a locking
mechanism preventing
me from doing so....
Connectors:
http://www.mouser.de/Search/ProductDetail.aspx?R=5-87278-1
Housing:
http://www.mouser.de/Search/ProductDetail.aspx?R=1-87270-5
9:46 a.m.
On Sun, 10 Jul 2016, Oliver Lehmann wrote:
AMP used to make a lot more contact variations including solder tail and
wire wrap versions. When Tyco bought AMP, they began rapidly discontinuing
large numbers of products as part of their LEAN initiative. It could be
the contacts that were originally used were some of those which were
discontinued.
You could probably crimp the contacts onto #24 or #22 busbar wire (tinned
solid copper) which would allow you to solder them to the board. The
proper crimper for these type of contacts is essential and an older model
AMP crimp tool is not terribly expensive second hand/surplus if you have
time to wait for one to turn up.
One is easy -
J3 is a 2x10 pin 2.54mm connector which is still common
today.
But it is higher than the usual connectors. It has a hight of 1.5cm. If you
search for the printed A-MP number (1-87456-6), you'll find the housing,
but not the soldered clips used inside this housing....
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
found:
Connectors:
http://www.mouser.de/Search/ProductDetail.aspx?R=87523-6
Housing:
http://www.mouser.de/Search/ProductDetail.aspx?R=1-87456-6
2:54 p.m.
Tothwolf <tothwolf at concentric.net> wrote:
On Sun, 10 Jul 2016, Oliver Lehmann wrote:
AMP used to make a lot more contact variations including solder tail
and wire wrap versions. When Tyco bought AMP, they began rapidly
discontinuing large numbers of products as part of their LEAN
initiative. It could be the contacts that were originally used were
some of those which were discontinued.
You could probably crimp the contacts onto #24 or #22 busbar wire
(tinned solid copper) which would allow you to solder them to the
board. The proper crimper for these type of contacts is essential
and an older model AMP crimp tool is not terribly expensive second
hand/surplus if you have time to wait for one to turn up.
I planned to use rigid wire. It Zilog used them too when they made the
circuit. You can see how they cut it on the bottom of the PCB.
I plan to just solder the wires on the connectors. Once they're placed
on the PCB they won't be moved so the soldering joint on the connectors
should not break over time. Crimping should not be needed I'd say....
One is
easy - J3 is a 2x10 pin 2.54mm connector which is still
common today.
But it is higher than the usual connectors. It has a hight of 1.5cm. If you
search for the printed A-MP number (1-87456-6), you'll find the housing,
but not the soldered clips used inside this housing....
http://pics.pofo.de/gallery3/index.php/S8000/S8000_boards/FINCH-Adapter-Boa…
found:
Connectors:
http://www.mouser.de/Search/ProductDetail.aspx?R=87523-6
Housing:
http://www.mouser.de/Search/ProductDetail.aspx?R=1-87456-6
2903
days inactive
2905
days old
9 comments
5 participants
participants (5)
-
elson＠pico-systems.com -
lehmann＠ans-netz.de -
mhs.stein＠gmail.com -
tothwolf＠concentric.net -
wh.sudbrink＠verizon.net