joshc
Well-known member
@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.
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Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.
mAcTX - ATX to Classic Macs
- Thread starter blusnowkitty
- Start date
Arisotura
Active member
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.
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.
JWrigley
Active member
@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.
Let me know, thanks! I'm in Australia btw.
joshc
Well-known member
@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
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.
Compgeke
Well-known member
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.
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.
JWrigley
Active member
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
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.
See https://68kmla.org/bb/index.php?threads/lc-lcii-power-supply-replacements.38365/ and scroll all the way to the bottom.
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)
Daniël
Well-known member
As mentioned above, this project has been discontinued.
@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/...
Compgeke
Well-known member
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.
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.
ktkm
Well-known member
I’d love a couple too!
landoGriffin
Well-known member
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.com
I'm still working on making sure the BOM is correct and that everything works correctly.
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 - GitHub - akuker/mAcTX_LC: Adapter to use an ATX power supply with a Macintosh LC series computer
github.com
I'm still working on making sure the BOM is correct and that everything works correctly.
joshc
Well-known member
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
MrFahrenheit
Well-known member
Would you be open to selling the unassembled ones?
