RE: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Tom Gardner via cctalk]

Personally I can’t recommend any company selling used parts stripped from 
surplus equipment but I recall several being discussed in this thread.

 

My recollection in the 2311 and 2314 class disk drives from IBM, Memorex, ISS 
(sold by Itel and Telex), Calcomp, CDC, Ampex, etc all used M series for both 
the data and control cables.  The data cables were hermaphroditic with  two or 
three coax connector receptacles and a number of sockets at each end mating to 
the corresponding connectors in the drive and controller.  So what u really 
want to find is a data cable from these very old drives (or at least one half 
of one) and strip out the sockets.

 

It maybe the 651 used the same connector block as the 2314 class data cables; I 
doubt if Memorex had the money to pay AMP for a custom block so they just used 
the connector block that was in their 2311/2314 line – IBM paid AMP for that 
block J

 

Good luck.

 

Tom

 

From: Mattis Lind [mailto:mattisl...@gmail.com] 
Sent: Tuesday, December 12, 2017 12:38 PM
To: Tom Gardner; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

 

 

 

2017-12-12 20:35 GMT+01:00 Tom Gardner via cctalk <cctalk@classiccmp.org>:

It  is from the AMP M series connector family used in the data cable for the 
IBM 2311/2314 and PCM equivalents including double density like the ISS 715 
(RP03?).  So some of the parts strippers should have lots.

 

What parts strippers is this? Did these drives use coax connectors as well? If 
someone see a used M-series with coax connector please save it! I am very 
interested in used parts as well.

 


Using coax at the FDD data rate was overkill so unless you want to preserve the 
connector for historical purposes u should be able to push out and then remove 
the pins and connect the wires to whatever connector suits u - flat cable 
connector for the control signal cable and whatever works for the three coaxes  
(coax to twisted pair should work).

 

I don't want to replace the current connector since the mating connector in the 
drive controller needs it. I just want something proper if possible to use when 
dumping the disks. But I don't want to spend a fortune of course. If not 
possible I simply solder wires to the relevant points on the drive circuit 
board.

 

 

 

 


Tom

 

 

/Mattis 

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Mattis Lind via cctalk]

2017-12-12 20:35 GMT+01:00 Tom Gardner via cctalk :

> It  is from the AMP M series connector family used in the data cable for
> the IBM 2311/2314 and PCM equivalents including double density like the ISS
> 715 (RP03?).  So some of the parts strippers should have lots.
>

What parts strippers is this? Did these drives use coax connectors as well?
If someone see a used M-series with coax connector please save it! I am
very interested in used parts as well.


>
> Using coax at the FDD data rate was overkill so unless you want to
> preserve the connector for historical purposes u should be able to push out
> and then remove the pins and connect the wires to whatever connector suits
> u - flat cable connector for the control signal cable and whatever works
> for the three coaxes  (coax to twisted pair should work).
>

I don't want to replace the current connector since the mating connector in
the drive controller needs it. I just want something proper if possible to
use when dumping the disks. But I don't want to spend a fortune of course.
If not possible I simply solder wires to the relevant points on the drive
circuit board.





>
> Tom
>
>
/Mattis

RE: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Tom Gardner via cctalk]

It  is from the AMP M series connector family used in the data cable for the 
IBM 2311/2314 and PCM equivalents including double density like the ISS 715 
(RP03?).  So some of the parts strippers should have lots.  

Using coax at the FDD data rate was overkill so unless you want to preserve the 
connector for historical purposes u should be able to push out and then remove 
the pins and connect the wires to whatever connector suits u - flat cable 
connector for the control signal cable and whatever works for the three coaxes  
(coax to twisted pair should work).

Tom

-Original Message-
From: Mattis Lind [mailto:mattisl...@gmail.com] 
Sent: Monday, December 11, 2017 12:45 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Looking for AMP / TE coaxial connectors - Memorex 651 drive

Hello!

I am about to start with the project to archive disks from the Incoterm system.

This system makes use of the Memorex 651 drive which is somewhat odd. It has 64 
tracks,is hard sectored with 32 sectors and spins at 375 rpm.

But I do have the drive which hopefully still is working. However the interface 
connector is nothing like I seen on a floppy drive before.

https://i.imgur.com/TklddLP.jpg


It is a AMP 202515-1 housing. The mating 202516-1 which I need is still in 
production and available for purchase from Mouser. The small coaxial connectors 
on the other hand has a minimum order of 1000 units and costs 10 euros each...

https://www.mouser.se/ProductDetail/TE-Connectivity/201146-2/?qs=DuOyNqEZh0%252bSNT4sy6om8Q==

Does anyone know of a source selling something like three coaxial connectors 
like this at decent price?

Or maybe a suggestion for another connector that could be modified into fit 
somehow? Potentially using glue to fixate it.

Of course the last resort is to just solder some wires directly onto the drive 
PCB, but if there is a nice solution I try that first.

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[jim stephens via cctalk]

On 12/12/2017 2:22 AM, Mattis Lind via cctalk wrote:

  A quick Internet search returns this link:



and they both claim to have this part in stock and sell it in arbitrary
quantities, although they do not seem to do retail sales.  You might try
contacting them regardless outlining what your problem is and they might
be willing to help.

  NB I have nothing to do with them; it's just a generic attempt to help.

   Maciej



Well. I am a bit sceptical against all those "components vendors" that
popups when googling. Usually they actually don't have the component. If
they had it why bother about inquiry? Why not just sell it? Anyway there
are some evidence that buy-components is a scam:

http://www.ripoffreport.com/reports/buy-components/internet/buy-components-took-order-and-required-payment-before-shipment-and-now-will-not-respond-t-1400043
https://www.trustpilot.com/review/buy-components.com

There seem to be very few real surplus sellers out there. I have dealt with
www.electronicsurplus.com and www.surplussales.com earlier without any
problem. They are a companies that actually sell stuff.. Unfortunately they
don't have it.
I've dealt with friends who have been selling parts in the mode of what 
you'd call "schlock" parts forever.  In their case no rebranding or any 
of the foolishness going on now


What they do deal with is that when they get a request (such as when you 
submit your request), they will send out the request if they don't stock 
the parts to a network of associates.  They will respond if they have 
it.  In my friends case, they've been in the business for 40 years, and 
one of the brothers selling IC's and the like for nearly 50.


If you hit any one of them, you will likely hit all of them, since the 
request you send in is shared.


I always send my business thru my friend, to be sure I don't have a 
problem, but others probably have not had the connections like that.


For this part, by the way, you might try electromavin.  He's been buying 
parts for at least 40 years I know of, and would probably know your 
part, and if he doesn't have it would be an excellent source to hit the 
network of connector parts vendors.


The site and contact for him is here

http://www.mavin.com/

A scary thing, he may be retiring, as are a lot of these, and the stocks 
will likely not be saved from the final trip to the gold scrappers.  
(who sold them a lot of the parts in the first place).


I know he is currently selling parts, as a friend is building up a lot 
of HP test equipment test cable sets for a number of instruments he is 
bringing up, and the sort of winchester looking connector you have 
there, he has in stock.  Also the Canon d-sub body stuff.


Thanks
Jim

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Mattis Lind via cctalk]

>  A quick Internet search returns this link:
>
>  connectivity-amp/201146-2.html>
>
> and they both claim to have this part in stock and sell it in arbitrary
> quantities, although they do not seem to do retail sales.  You might try
> contacting them regardless outlining what your problem is and they might
> be willing to help.
>
>  NB I have nothing to do with them; it's just a generic attempt to help.
>
>   Maciej
>


Well. I am a bit sceptical against all those "components vendors" that
popups when googling. Usually they actually don't have the component. If
they had it why bother about inquiry? Why not just sell it? Anyway there
are some evidence that buy-components is a scam:

http://www.ripoffreport.com/reports/buy-components/internet/buy-components-took-order-and-required-payment-before-shipment-and-now-will-not-respond-t-1400043
https://www.trustpilot.com/review/buy-components.com

There seem to be very few real surplus sellers out there. I have dealt with
www.electronicsurplus.com and www.surplussales.com earlier without any
problem. They are a companies that actually sell stuff.. Unfortunately they
don't have it.

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[jim stephens via cctalk]

Isn't Element 14 the UK version of Newark?

On 12/11/2017 6:28 PM, Jon Elson via cctalk wrote:


It is a AMP 202515-1 housing.
I buy some M-style connector housings from Newark in the US, and they 
sell them in single quantity.
I think Newark has EU branches as well.  This housing is a smaller 
version from the same series.


Jon 

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Jon Elson via cctalk]

On 12/11/2017 02:45 PM, Mattis Lind via cctalk wrote:

Hello!

I am about to start with the project to archive disks from the Incoterm
system.

This system makes use of the Memorex 651 drive which is somewhat odd. It
has 64 tracks,is hard sectored with 32 sectors and spins at 375 rpm.

But I do have the drive which hopefully still is working. However the
interface connector is nothing like I seen on a floppy drive before.

https://i.imgur.com/TklddLP.jpg


It is a AMP 202515-1 housing.
I buy some M-style connector housings from Newark in the US, 
and they sell them in single quantity.
I think Newark has EU branches as well.  This housing is a 
smaller version from the same series.


Jon

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Maciej W. Rozycki via cctalk]

On Mon, 11 Dec 2017, Mattis Lind via cctalk wrote:

> It is a AMP 202515-1 housing. The mating 202516-1 which I need is still in
> production and available for purchase from Mouser. The small coaxial
> connectors on the other hand has a minimum order of 1000 units and costs 10
> euros each...
> 
> https://www.mouser.se/ProductDetail/TE-Connectivity/201146-2/?qs=DuOyNqEZh0%252bSNT4sy6om8Q==
> 
> Does anyone know of a source selling something like three coaxial
> connectors like this at decent price?

 A quick Internet search returns this link:



and they both claim to have this part in stock and sell it in arbitrary 
quantities, although they do not seem to do retail sales.  You might try 
contacting them regardless outlining what your problem is and they might 
be willing to help.

 NB I have nothing to do with them; it's just a generic attempt to help.

  Maciej

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Steve Malikoff via cctalk]

Mattis said
> Hello!
>
> I am about to start with the project to archive disks from the Incoterm
> system.
>
> This system makes use of the Memorex 651 drive which is somewhat odd. It
> has 64 tracks,is hard sectored with 32 sectors and spins at 375 rpm.
>
> But I do have the drive which hopefully still is working. However the
> interface connector is nothing like I seen on a floppy drive before.
>
> https://i.imgur.com/TklddLP.jpg
>
>
> It is a AMP 202515-1 housing. The mating 202516-1 which I need is still in
> production and available for purchase from Mouser. The small coaxial
> connectors on the other hand has a minimum order of 1000 units and costs 10
> euros each...
>
> https://www.mouser.se/ProductDetail/TE-Connectivity/201146-2/?qs=DuOyNqEZh0%252bSNT4sy6om8Q==
>
> Does anyone know of a source selling something like three coaxial
> connectors like this at decent price?
>
> Or maybe a suggestion for another connector that could be modified into fit
> somehow? Potentially using glue to fixate it.
>
> Of course the last resort is to just solder some wires directly onto the
> drive PCB, but if there is a nice solution I try that first.
>

That connector looks a bit similar to the Winchester MRACs apart from the 
addition of some
larger holes and pins for the coax connectors. Your second link didn't work for 
me but
looking at the first pic, perhaps you could bodge something up out of a piece 
of K brass
rod and tubing, with some tubing spacer from a suitable dia body eg. a 
ballpoint pen.

For the connector body, it could be 3d printed, or make a paper rubbing and 
drill a block
of plastic, or simply fix the makeshift pins in then cut spacing strips of 
plastic to slip
through the rows and then bind and cover with epoxy.

I made a quick stopgap power connector for testing an Amiga 500 by soldering 
the leads
of a discarded rack server power supply to 5 small nails, worked just fine.

Steve.

Re: Looking for AMP / TE coaxial connectors - Memorex 651 drive

[Chuck Guzis via cctalk]

On 12/11/2017 12:45 PM, Mattis Lind via cctalk wrote:

> Or maybe a suggestion for another connector that could be modified into fit
> somehow? Potentially using glue to fixate it.

I wonder if you could re-work the drive to use a standard 13W3 connector?

--Chuck