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  1. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    And this is actually something of an issue with these rebuilt packs - NiMH cells hold voltage pretty well, the voltage drop is really slow for most of the runtime, and then it drops very sharply. Basically, the metering is pretty much useless.
  2. Rajel

    SD to SCSI

    Wheeee, I flipped the mis-installed chip around and it worked! Booted right into 7.6.1 on my prepared SDcard.
  3. Rajel

    How do I connect a Macintosh SE/30 to the Internet ?

    I've had all the bits to make a DreamPi for some time, the LVI's been the thorn in my side. I have that Dell USB modem, how are you modifying it for direct LVI? I've got a PB160 that's gotta get online!
  4. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    Also probably true. Generally, I'm probably going to stick to external charging for the individual cells.
  5. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    The protection really isn't as needed unless you're charging the cells from the PB itself, and right now I just charge them individually in the Eneloop's included charger.
  6. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    Nope, I'm actually just running straight battery. I had a fuse on it but then realized that the fuse itself actually shorted the back (which probably just blew immediately)
  7. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    Well, the PSU itself is 7.5v/2A. The system doesn't run at that voltage/current, it's regulated down. Same for the "6v" from the stock battery. Battery voltage fluctuates enough that good regulation is required. Most can handle a decently wide range; not sure what the PB160's battery regulator...
  8. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    My first thought was PRAM battery. I'm running 6 in the printed pack (the system regulates battery output anyway) and while running last night I never saw the meter level drop at all. I do need to swap the PRAM battery anyway, guess that'll be the next fix.
  9. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    So, I had the machine booted up with the SCSI2SD last night, ran like a champ. Didn't even come close to draining the battery before shutting down for the night. Booted it up this morning, and it appears the battery has almost completely drained - anyone else see this behavior? I'd think there...
  10. Rajel

    Yet another Macintosh Portable repair thread.

    Aaaaaaaah. That makes sense. Sega did similar for the RGB video DAC used in several of its arcade boards, and the Game Gear kiosk systems. Potted SMD components on a DIP board.
  11. Rajel

    SCSI2SD and spindown

    I'm using a USB adapter, but on a PC. That way it's presented as a modern USB Mass Storage device. OSX should have no trouble seeing it, but it won't mount unless there's a valid set of partitions and volumes on the card already. It should be viewable in Disk Utility at the very least under OSX...
  12. Rajel

    SCSI2SD and spindown

    Fixed it! Just booted up my prepared 7.6.1 SDcard, running on battery like a champ. Sleep and wake work just fine. Now to get it online!
  13. Rajel

    Yet another Macintosh Portable repair thread.

    I can take on some mild soldering apprenticeship :) A good buddy of mine for many years has mentored me in the art, I'm happy to pass on any tips I can. Granted, most of the advice is in assembly and repair technique, as well as tool recommendation, not quite so much in troubleshooting other...
  14. Rajel

    Yet another Macintosh Portable repair thread.

    Oh, DIP. Easy enough, flux and hit them with an iron to reflow the solder.
  15. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    Brought the 160 out to the office today, still running off the SCSI drive. Several colleagues got a kick out of seeing the thing power up, and then a double kick when I pulled out the battery pack. Had to pass that around as much as the laptop itself!
  16. Rajel

    Yet another Macintosh Portable repair thread.

    Use kapton tape and aluminum foil to isolate what you're heating, else you ask trouble from other components on the board (or melted plastic connectors) I'm guessing the hybrid IC is a surface-mount component, with leads only on the top side of the board? I'd start with just that. If you're not...
  17. Rajel

    Macintosh PowerBook 145/160/170 battery replacement

    For now I'm just popping the AAs out and using a dedicated charger. Can't wait to see what battery life I get with a set of Eneloop Pros and SCSI2SD instead of spinning rust.
  18. Rajel

    SD to SCSI

    Mine ended up with one of the buffer chips installed backward. Gonna order a replacement and swap that out, should run good as new. The SD card itself is built with a mostly-universal driver partition, so it should work as soon as I slap it in. It's already got 7.6.1 installed with a bunch of...
  19. Rajel

    SD to SCSI

    Got mine in and it's defective. Think I've found the issue, waiting for the dev to confirm, and then I'll probably repair it.
  20. Rajel

    SCSI2SD and spindown

    Yeah, considering all I've done is plug in over USB so far. I'm in an email chain with the creator dude now, he's not gonna have stock for another 3 weeks though :-/
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