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Thanks. I didn’t find the very helpful thread I mentioned in post #2 until today. I ordered the RPT60A today, along with the Molex crimps and connectors from Mouser. The RPT60A has a 50% tariff, making it cost about $26, which is still inexpensive.

I see this was already done and documented at https://68kmla.org/bb/index.php?threads/replacement-power-supply-in-quadra-605.41793/

Does the computer function? The plastic case looks to be in good shape - not broken. The plastic tends to get brittle with age.

I’m looking for a Performa 460 power supply, because I bought a recapped Performa 460 logic board. The going price for an untested unit on eBay is $80, while tested units cost $100+. I was browsing power supplies on Mouser and the Mean Well RPT60A would supply the correct power : Chassis Mount...

Just wondering how difficult it would be to use a Performa 460 board (LCIII) in a Centris 660AV case? The Centris PS and floppy drive work.

GTS 12 94V0 is the PCB manufacturer and 94V0 UL flammability rating. I’m guessing Apple had more than 1 PCB manufacturer.

Nobody has a 3Dfx Voodoo 2 card installed? Makes a huge difference.

Since you upgraded the memory, you might want to try the Classilla browser at https://www.macintoshrepository.org/1770-classilla

Nice haul. FYI it’s not a good idea to store formatted disks on or next to a CRT

Check the electrolytic caps on the Gigadesigns board - they may be bulging or leaked.

Sold a few hours ago

Wow - lots of good info. Thanks

FYI the LS-120 drive is not compatible with Mac 400k/800k disks

FYI Adafruit sells upcycled, Sony MFP920 drives that have been tested for $19.95 https://www.adafruit.com/product/6037

Depending on the switch settings, you should be able to get 640 x 480, 800 x 600, 832 x 624 and 1024 x 768 on a VGA monitor. Adding a VRAM SIMM will get you more colors in each mode.

FYI all Powermac G4 had USB 1 ports. You could buy USB 2 cards for PowerMac G4 machines, though they would only function at USB 2 speeds under OSX. All PowerMac G5 had USB 2 ports. iBook G4 had USB 2 ports. The behavior you are experiencing might be due to the different USB port speeds.

I looked at the eBay listing for the 4 port USB switch, which has a clear cover and it appears to contain a mechanical switch. I suspect this switch only works at USB 1 speed 1.5 Mbit/s. I believe the Apple keyboard and mouse you mentioned are USB 1 devices. USB 2 and USB 3 switches require an...

Your post on December 8 shows a terminator with passive termination (resistors). Sometimes you need active termination. I think the ZuluSCSI is acting as an active terminator. If your hard drives work with a ZuluSCSI, it sounds like a permanent solution to me and not that expensive.

It’s a nice system, but sold mine over a decade ago and don’t remember how to remove the front. There was a metal catch you had to raise on the front.

I started on an Atari ST in 1985. $499 for a 520ST, 400K 3.5 inch floppy and a 640 x 400 monochrome monitor. The Amiga may have been great, but out of my price range at the time. Upgraded the ST over the years and enjoyed running Mac software with a Spectre GCR running System 6.0.5. It was an...