68kMLA Classic Interface

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mAcTX - ATX to Classic Macs

Posted by: joshc on 2021-02-17 18:03:41

@Compgeke @blusnowkitty Is there any update on availability of these please? It seems there are a lot of buyers waiting so an idea of when these might be available again would be great. Thank you.

Posted by: Arisotura on 2021-07-14 05:15:42

Just wanted to chime in about this: I have observed, atleast on the LC, that the motherboard uses separate digital/analog ground planes, and these aren't directly connected -- instead, the analog ground goes through the RF shield and the power supply case. I wonder if replacing the power supply entirely (and thus breaking that connection) could cause audio issues, as the audio system would be ungrounded.

In practice, though, there may be other ways the two grounds end up connected, such as the floppy drive, or whatever monitor is attached...

Just worth considering imo.

Posted by: JWrigley on 2021-08-11 00:11:01

@Compgeke @blusnowkitty Not sure if I have completely missed the boat on these, but I'd love to buy one suitable for a Macintosh IIsi if that's still a possibility. Heck, may as well get the LC model as well 🙂 Let me know, thanks! I'm in Australia btw.

Posted by: joshc on 2021-08-11 01:37:59

@Compgeke @blusnowkitty Not sure if I have completely missed the boat on these, but I'd love to buy one suitable for a Macintosh IIsi if that's still a possibility. Heck, may as well get the LC model as well 🙂 Let me know, thanks! I'm in Australia btw.

Before the great forum crash of 2021, I think blusnowkitty had posted that this project was now discontinued.

A few others are currently working on a similar type of product.

Posted by: JWrigley on 2021-08-11 03:19:13

Thanks, @joshc , that's a shame but I guess I will have to keep an eye out for the other options 🙂

Posted by: Compgeke on 2021-08-11 19:55:19

I've actually got mAcTX II boards kicking around here, as well as all the components. The LC one's files are online but I still have the IIc stuff. They were kind of two separate projects under one name.

I really need to get around to assembling boards and/or kits. Unfortunately my job hit me hard with mandatory OT then overnights and left me with no time to do much of anything.

Posted by: JWrigley on 2021-08-11 20:04:56

I've actually got mAcTX II boards kicking around here, as well as all the components. The LC one's files are online but I still have the IIc stuff. They were kind of two separate projects under one name.

I really need to get around to assembling boards and/or kits. Unfortunately my job hit me hard with mandatory OT then overnights and left me with no time to do much of anything.

Thanks for your reply, completely understand how work can overtake any fun hobby stuff. Look forward to an update on the kits when you can, definitely interested in the two as mentioned 🙂

Posted by: bdurbrow on 2021-08-11 20:27:07

I have a preliminary design for the LC almost done; still needs silkscreen editing.

See https://68kmla.org/bb/index.php?threads/lc-lcii-power-supply-replacements.38365/ and scroll all the way to the bottom.

Posted by: max1zzz on 2021-08-16 10:02:37

The LC one's files are online but I still have the IIc stuff. They were kind of two separate projects under one name.

Do you know where they are posted? I know there where in the thread here before the crash but I haven't been able to find them elsewhere...

I only ask as I want to make a couple of red pcb's to go with my red repro LC boards 🙂 (Otherwise I would just look to buy one form you once your ready)

Posted by: cadenya on 2021-08-29 17:31:08

Does anyone know how close these are to completion? I need a IIci power supply and an LC. Thank you!

Posted by: Daniël on 2021-08-30 04:34:33

Does anyone know how close these are to completion? I need a IIci power supply and an LC. Thank you!

As mentioned above, this project has been discontinued.

Posted by: Melkhior on 2022-01-14 08:09:08

I've actually got mAcTX II boards kicking around here, as well as all the components. The LC one's files are online but I still have the IIc stuff. They were kind of two separate projects under one name.

@Compgeke Discovering this long after the fact, any chance of you making more, or sharing the design files with the community? (so we could make our own if you don't have the time/will to deal with this anymore).
I have comatose IIci & IIvi that could use a replacement power supply for testing, and I'm sure many others would appreciate being able to have an alternate solution to failing PSUs in IIcx/IIci/IIvi/IIIvx/...

Posted by: Compgeke on 2022-01-14 11:10:11

I've actually got a batch of boards built up but I haven't got the brackets printed out for them. Got a 3D printer, messed up the Z axis sensor and haven't got much further on it.

I could send some boards out without brackets and provide an STL file for printing one, though. I've got the bracket files for the IIsi and IIcx/ci/Q700 here.

Posted by: Melkhior on 2022-01-14 11:15:38

I have a 3D printer so I only need the STL to make the brackets 🙂 However I'm in France, so shipping might be a problem. If that's not a deal-breaker, I could use at least two.

Posted by: ktkm on 2022-01-14 12:13:13

I could send some boards out without brackets and provide an STL file for printing one, though. I've got the bracket files for the IIsi and IIcx/ci/Q700 here.

I’d love a couple too!

Posted by: landoGriffin on 2022-02-20 15:11:11

Since I felt like procrastinating all afternoon.... I did an update to the mAcTX LC. Assuming they work, I'll have a handful to pass around.

These are based on the version uploaded by @blueskykitty at https://68kmla.org/bb/index.php?threads/mactx-lc-boards.38912/

I've uploaded them to Github for easier tracking:

GitHub - akuker/mAcTX_LC: Adapter to use an ATX power supply with a Macintosh LC series computer

Adapter to use an ATX power supply with a Macintosh LC series computer - akuker/mAcTX_LC

github.com

I'm still working on making sure the BOM is correct and that everything works correctly.

Screen Shot 2022-02-20 at 4.55.33 PM.png

Screen Shot 2022-02-20 at 4.56.36 PM.png

Posted by: sardaukar on 2022-05-13 04:38:02

Is it still possible to get one of these for a Quadra 650?

Posted by: joshc on 2022-05-13 04:57:18

Is it still possible to get one of these for a Quadra 650?

These are not available to buy, if you read through the thread you'll find the project was abandoned/discontinued.

For a 650 PSU replacement, I would put an ATX PSU inside an existing 650 PSU, like this:

Stealth Macintosh IIcx/IIvx style SFX PSU rebuild

Hello, I've been asked to post this here on IRC so there it is. A lot of PSUs from this era are bad quality and difficult to repair (if possible at all). One of the worsts is the Astec AA15830 (Apple P/ 699-0392) One of the solution is to use the excellent adapter board by @blusnowkitty and...

68kmla.org

Posted by: Compgeke on 2022-05-13 05:54:28

I've actually got ~10 assembled ones that'd fit the Q650 and probably 15 unassembled PCBs, but I just haven't had the time to really deal with them much. I started working on them when I was unemployed, and then once I'm back to work it's just no time left.

Posted by: MrFahrenheit on 2022-05-13 08:30:14

I've actually got ~10 assembled ones that'd fit the Q650 and probably 15 unassembled PCBs, but I just haven't had the time to really deal with them much. I started working on them when I was unemployed, and then once I'm back to work it's just no time left.

Would you be open to selling the unassembled ones?

Posted by: adzq88 on 2022-05-20 04:54:23

Where can I find the proper Molex connector for the LC PSU connector?

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