Need Mfr & Part# for Power Supply male socket that mates to Apple II MB female socket

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cfkerchner's picture
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Need Mfr & Part# for Power Supply male socket that mates to Apple II MB female socket

Hi all,

Looks like my power supply is dying again. I'm looking for the name of the manufacturer and part number for the male socket that is on the colored wire bundle that goes from the Apple II+ PSU to the motherboard. 

I did see just now, that there is a connector assembly for sale on eBay from a salvaged PSU unit with the colored pigtails still on it, but they want $32 plus shipping. That is an extreme over price if you ask me, for just a pre-assembled (or should I say cut off a blown PSU) connector assembly. But that's the law of supply and demand I guess.

I've got lots of various colored and gauges of wire and crippers and soldering stuff. So all I need is a source of the male 6 pin socket and some of the connectors that go on the ends of the wires and then slip into the connector, and then I can make my own pigtailed unit to connect up an external multi-voltage power source until I can fully diagnose the problem with my dying PSU.

I believe one of the voltage rails is weak as to amps output and the bus voltage is thus dropping under load since I can boot the machine and read a disk but cannot write to a disk. Disk drives take more juice when they format and write.

I've tried different controller cards and disk drives, which were all working yesterday, and its the same issue.  I can read disks but not format or write to them. And yes I do have the write protect slot free and clear. :-) 

I had previously replaced the across the line C1 capacitor when that blew on the first day I had turned the power supply on after 40 years. But it has been working find for over a week until today.  I tried replacing C7 with a brand new one. Still same symptom. So I may have to start desoldering and changing all the Caps in this very old PSU.  In the meantime I wanted to keep my Apple fired up using an external power supply. I've got a bunch of working PC power supplies I can use as a source, plus a tech bench mult-voltage supply unit I built way back. I also have one of those "universal replacement board PSU kits" on the way for 10 days now.  But intalling that would require me to cut off the socket with pigtailed wires from my weak PSU unit. I'd like to try and fix that over time and not salvage it for parts and connectors.

My best guess is that said male connector is made by MOLEX or a competitor.

I'd buy a non-working PSU unit on eBay for salvage parts but they want almost $100 for one of the non-working ones, i.e., selling for parts only.

So, if anyone knows the brand of the 6 pin male power supply unit socket, please let me know.  Thanks in advance

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How about ...

How about making an offer on this one:

https://www.ebay.com/itm/383448004991/

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The product name is TE 1

The product name is TE 1-640520-0 and some of these: 571-641294-1-CT

 

I.e.

https://www.mouser.de/ProductDetail/TE-Connectivity/1-640520-0/?qs=%2Fha2pyFadug3IeF61eD7003wCYKUmsjpXAbgMiep3MI%2FrxTHKQ0mnQ%3D%3D

https://www.mouser.de/ProductDetail/TE-Connectivity-AMP/641294-1-CUT-STRIP/?qs=%2Fha2pyFadug5bKTbaCHvz9%252BubNk0Fs2Jbsj4pWl4UKlVJlwMmwWCUg%3D%3D

 

Regards

Ralf

 

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Just countered $15

He wanted $32 plus about $5 shipping. I just countered $15

 

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This looks like the same male socket kit but in white via Amazon

This looks like the same male socket kit but in white, sold via Amazon for $10.

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Sellet counter offered to my $15 and asked for $20. I accepted

Sellet counter offered to my $15 and asked for $20. I accepted.  Also about $5 shipping.  Jeez if these assemblies are rare and expensive, I can make and sell them in my part-time epic saga Apple adventures in my cellar.  :-)

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Thank you Ralf

Hello Ralf,

They have the male sockets for about $2 each at Mouser.com in the USA. Thank you for that part number.

https://www.mouser.com/ProductDetail/TE-Connectivity/1-640520-0/?qs=%2Fha2pyFadug3IeF61eD7003wCYKUmsjpXAbgMiep3MI%2FrxTHKQ0mnQ%3D%3D

und then a bunch of connector pins they sell in the 100 piece lot for about $14 ...

https://www.mouser.com/ProductDetail/TE-Connectivity-AMP/641294-1-CUT-STRIP/?qs=%2Fha2pyFadug5bKTbaCHvz9%252BubNk0Fs2Jbsj4pWl4UKlVJlwMmwWCUg%3D%3D

Then of course the shipping. So getting the completed male power socket with pigtails fully assembled from that person via eBay for the negoitated price of $20 + $5 shipping was not that bad a deal at this point, in retrospect. I'll just have to wait a week to get it.  I sure miss the speedy delivery of things back before the pandemic hit.

And at least now I know where to get them to make them, if I need another one.

Danke schön

P.S. For those following my two week long saga in trying to get my 40 year old Apple II+ working after being on the shelf in my cellar for that long, I did successfully get my SSC card communicating with an old Windows 7 machine COM1 port using ADTPro. So another step forward as of last night.

Now a step backwards again with a failing power supply.

I also want to again thank Thellmer of this forum for getting me a working copy of Locksmith 6.1 and PRODOS 8 ver 2.4.2 by postal mail, which was very helpful.

I was successful in transferring the "grub2.dmp" file via ADTPro to my Apple's memory. I could then format a disk with that on my system. But upon trying to retrieve/transfer and write a ".dsk" file to disk last night, the disk would do the transfer but I would keep getting a message that the writing when completed to disk, that it had errors. As I repeated that process trying different floppies thinking one was bad or weak, I would see an X displayed on my screen during the ".dsk" file transfer process and the writing to my disk. I assume those X marks on the screen are when errors were detected. That I think at this point had something to do with my failing power supply late last night, which today quit my being able to format or copy any disks from one drive to the other. My power supply is dying, which is why started the above thread.

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cfkerchner wrote:I was
cfkerchner wrote:

I was successful in transferring the "grub2.dmp" file via ADTPro to my Apple's memory. I could then format a disk with that on my system. But upon trying to retrieve/transfer and write a ".dsk" file to disk last night, the disk would do the transfer but I would keep getting a message that the writing when completed to disk, that it had errors. As I repeated that process trying different floppies thinking one was bad or weak, I would see an X displayed on my screen during the ".dsk" file transfer process and the writing to my disk. I assume those X marks on the screen are when errors were detected. That I think at this point had something to do with my failing power supply late last night, which today quit my being able to format or copy any disks from one drive to the other. My power supply is dying, which is why started the above thread.

 

This does not sound like a power supply problem. You should check your power suply voltages under load before you reach that conclusion.  I'm not a fan of using an ATX type power supply as a replacement.   

It's highly unlikely that a slightly sagging +12V (usually 11.8V in reality) or +5V (which is adjustable on some models od power supply by turning a little trimpot inside the unit) would cause ADTPro to have write errors to a diskette.

It soulds a lot more like (and it is far more likely and simple to check and solve) a dirty drive head to me than a "weak" power supply.  

 

P.S.  Now that you have your Super Serial Card connected to your PC, the easiest way to get a relaible version of ADTPro onto your II+ is to use the "Speediboot" option in the bootstrapping menu.  One that's complete and ADTPro is running on the II+, transfer the ADTPRO-2.0.1.DSK (or whatever version you're using) from your PC onto a real floppy in your II+.  

 

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Thank you for the sage advice

Hello Baldrick:

Yes, you are correct that I should have checked the voltage under load on one of the open slots. But this old horse here thinking at the time, since the whole system was working fine as to the disk drives, four total drives on two disk controllers, for the week before the event ... and all four drives quit working at the same time, I deduced from the least common denominator in my diagnostic mind that it had to be a dying power supply. I had already repaired that old power supply once before.

I got a new power supply today. A "universal one". I made a temporary wiring harness to connect from the new supply to my Apple II+ mother board socket using wires with a push-on round connector at one end and pins to go into the new universal power supply spring type connector block. I have it all hooked up and all is working well again.  I will let it on for at least 2 hours before I will 100% say the problem is fixed. But as of now, I believe it is.

See picture of my temporary power hook-up: http://www.kerchner.com/images/computers/Universal_Power_Supply_With_Cable_Harness.JPG

In looking at the power that goes to the drives, it was likely a problem with the +5V bus voltage, imo. Which I think you suggested that too.

I have ordered a set of capacitors and will re-cap the old, original power supply, and re-store that to working order when I get the cap kit.

I will take all the drives apart later and clean the head as you suggested. But I don't think they are a problem since I have drive tested and formatted and copied various disks in all the drives using the new power supply and all are working well again. But cleaning them is always a good idea.

Thanks again for your reply and tips.

 

 

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