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I have good news. I was able to find cheap wires for both the logicboard harness and the AC input (AC board to ATX).  18AWG for LB: https://www.arrow.com/en/products/1430-18-1-0500-004-1-ts/cnc-tech-llc 16AWG for AC: https://www.arrow.com/en/products/1430-16-1-0500-001-1-ts/cnc-tech-llc...

Don't worry @CC_333, I understand. I have been in almost the same situation for the past year  :cry: . I thankfully found something recently that'll keep me busy and afloat. I'll keep the extra sets on hand until someone wants them. Don't worry, one has your name on it. In the meantime, if you...

Your Mac Portable was the 3rd Mac (CK108003M60) manufactured during the 8th week (CK108003M60) of 1991 (CK108003M60) in Cork, Ireland (CK108003M60).

@wanderingjew I agree and that's what I plan on doing once everything's sorted out. 

Ok, I'll order 10 sets then! 4 are still available (6 of the 10 are on hold, 2x for cheesestraws, 2x for Renegade and 2x for me). I'll probably post something on r/vintageapple, maybe someone there will be interested too.  Now I can offer sets at $8 a pop (instead of $10, shipping still not...

Sure thing @Renegade. I guess those will be for your 900 & 950? You want two sets (2xAC+2xDC) or only one set of the two (1xAC+1xDC)? In other news, I've had to replace the relay. It now has a 12V coil. For one it was a bit on the expensive side and it was also out of stock at Digikey and...

I'm going to have to make yet another version.  1/ I found some Molex spade connectors that have a slightly different footprint. I'll update the AC Board soon with the new dimensions.  2/ The EMI filter is expensive (12 bucks). I'll investigate how much the raw components cost and perhaps make...

Back with some quotes. 2oz copper layers are way more expensive (20 bucks per card extra) than what I had in mind. Therefore, I'd had to recalculate every critical 'net' to accommodate for 1oz layers. I've used this site to calculate the temperature rise. I'll be using FR-4 laminate...

Okay, the latest boards (v0.4) are in! This time they should be pretty much finished.  DC Board:  AC Board (not to scale, obviously): As promised, the Gerbers (fabrication files) will be available free of any charge... and here they are: They'll be checked one last time but I'm...

From the SoftwareFPU Macintosh Garden download page: Still worth a try! I concur with Crutch. I think the lack of FPU is causing this crash.  

I made a quite a mistake earlier and switched around -12V and +5Vsb on the Quadra Logicboard connector... I let you imagine what consequences it would have had if I hadn't corrected it...  New board layout:

Proposed DC board layout: Notes:  - As explained in my previous post, J1 "Quadra 9x0 Logic Board" is not a connector. The extension cable will be wired in permanently at this position. - Added compatibility with 20 pin ATX PSUs. A 24 pin one is still preferred though.  - Optional 3.3V...

I don't know how I missed this but this is pure gold! Keep up the good work! Can't wait to fix the Q950 to play this!

Thanks guys for your support!  @cheesestraws I also have 220/230V where I live, but the 'worst case scenario' is with the US mains voltage. To get the same wattage, they need about twice the amperage, and more amperage means more heat and a bigger copper surface. For 230V operation, those...

This is starting to look like a monologue but no worries  :quadra: As I started work on the DC board, something blew my mind. The Quadra 9x0s aren't using 22 pin logic board connectors, they have 24 pins!! Which means I now have the opportunity to use ATX extension cables as the main logic...

FINALLY managed to make a logo that works! Turns out that (for logos at least) you have to point Kicad towards a folder and not the actual file... Why is that so???

Current revision: QuadrATX AC Board V0.2 Pcbnew view: 3D Rendered View: Changelog: - Deleted original J5 as screw will suffice for connecting the board to chassis ground. - AC Neutral track re-routed - Earth plane on both sides - Screw hole now grounded (I had some issues with this as...

So I made some progress on the PCB design. Keep in mind that it is my very first draft (and it also was my very first time using Kicad...). A friend of mine (who BTW built his own 8 bit computer, yet he's not The 8-Bit Guy!) has agreed to check the boards for mistakes before I send them to...

@AlpineRaven So which model did you end up using in your Q700?  For the QuadrATX 9x0 PSU mod I'm (still) working on, I went with an industrialPPC NF F12 as I wasn't able to find the original fan's specs. It's definitely overkill. 

If you really want a quiet and yet competent fan, get a Noctua.   You’ll want to match or exceed the old fan’s  CFM and pressure specs. Have you tried Googling its model number?