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That's a lovely job, did you do a thread about the build anywhere? Sorry if I missed it. That has also come up amazingly well. The 650 is the best 68k Mac in my opinion. Stable 40MHz overclocks are trivial by adding one or two SMD resistors and two jumper headers. Its really easy to do. Best...

Oh, if you want them to fail, you might need to put a load resistor on them. Sat in a jar they're less likely to do anything.

The 50% over rating requirement wasn't realised until later. The reason they're not just called 8V parts or physically better rated is for continuity from before they realised they'd under rated them due to in the wild failures. Apple followed the guidance that was available at the time...

I worked out what the confusion was and the reason I had thought it wasn't possible.... The resistors are on the bottom of the 630 style board, and on the top of the 580 style board. Basically I'd gone looking in the same place and found only one of the four resistor footprints.

Yeah, there was a an option that had a PDS terminator and a Apple Display 24AC Nubus card. Also the 8150 shipped like that.

7100 is also recessed and the end of the socket is flush (it seems to protrude slightly on the 6100 - so while the opening is recessed, the end of the socket isn't).

Yeah, you do need it to get all the resolution options. Apple ran out of combinations, and so used diodes that meant you could detect not just a connection, but the direction of flow. What diode you use isn't too picky, just use a silicon rectifier diode like a 1n4007 if you already have one, or...

I tend to go for the 21" MultiScan option because it gives you 1152x870 - a lot of the older macs don't support any VGA resolutions above 1024x768, but my VGA monitors support 1152x870. So it makes more sense unless you're using a PCI era mac that can do 1280x1024... at which point I'd use a PCI...

Thanks JDW - the actual temp was closer to 40 (the photos I picked were because they gave a better overall view), but given yours is through the housing I suspect they're the same. Good to know. I am curious what is wrong with mine considering it is new old stock.

Oh, I mean literally make the part in 3D with cardboard. All of the bends, none of the flat. The nearest Lowes or Depot is several thousand miles away for me :ROFLMAO: I do have some sheet aluminium in the other room though, but the price of it I'd rather use cardboard and sticky tape :LOL:

Ah, excellent, I understand what you mean now. My measurement was over the plastic housing on the connector, which is the size of the recess in the back of the machine, but not the opening, which a quick check with a plastic ruler says is about 32mm like @wottle says. That's fine, looks like...

Ah, do you mean that the VGA connector is wider than the bracket? You can fit it to the outside of the bracket. But also the bracket is 35mm wide and the VGA connector is about 31mm wide.

But.. That doesn't matter? That doesn't have any impact? The VGA connector is inside the case? As long as the VGA cable end goes through the huge opening in the rear of the case, there isn't an issue? I'm confused again. I guess you're seeing something I'm not, I'll leave you too it and see...

The cad model has 26mm between the two screw centres on the connector. That is 1mm oversize vs what they actually should be (like I said, I measured with a ruler quickly to get a visual representation rather than a final design). I realise that is a 9 pin part, but the bodies are the same as...

I believe they are probably what Apple called "BLT" (probably doesn't stand for Bacon, Lettuce Tomato). This is what was used for earlier revisions of this project - Jaguar and Hurricane. Couple of extracts from Apple docs from the period.

Just two - I think you're looking at the prototype chipset chips. The CPUs are missing - one connector has been torn off and you can see 601 in the silkscreen footprint, the other is still there.

Should be fine for that, probably a little expensive. Likely cheaper to get it laser cut locally and even folded. Then you'd just need to plate it at home to stop it rusting.

Thanks Kai, that will need to wait for funds sadly.

I'm afraid that I don't quite follow, the issues you raise aren't things that I was worried about and I'm not 100% sure which features you mean - regional dialects can vary a lot for this sort of thing - lug can mean several things, in this context it could mean the threaded parts that go...

We could potentially use photogrammetry - there is free software for it - it might not be perfect dimensionally, but it would be close for mockups. I keep meaning to build a stepper motor driven turntable for photogrammetry - possibly with an arc rail for the camera too. Taking the photo takes...