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mAcTX - ATX to Classic Macs

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.
 

JWrigley

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.
 

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 :) 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.
 

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.
 

JWrigley

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.
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 :)
 

max1zzz

Well-known member
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)
 

Melkhior

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.
@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.
 

Melkhior

Well-known member
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.
 
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