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LOOM

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Everything posted by LOOM

  1. According to the datasheet the input voltage should be between 7 to 25 volt. 16v seems plausible. However, choosing a capacitor with a lower ripple rating than the original can cause stress in the capacitor and make it fail again. So sometimes choosing the cheapest capacitor can break things. Also, choosing a capacitor with a higher max temperature and rated longer life will usually help. This video explains a lot of the capacitor differences and why it matters to choose the correct one (and why some blows ): https://www.youtube.com/watch?v=ZAbOHFYRFGg Really interesting
  2. If it's still there after recapping, try to do a RAM check/diagnosis. And check with another/fewer ram attached.
  3. If you install netatalk2 on a linux server, then you can set up a Appleshare pointing to that directory and connect to it in Chooser. After you save the project on the macintosh you can use git locally on the linux server to commit/push. You can even login to the linux server with the macintosh you are working on to use git on that shared Appleshare folder you are working in. If you don't have a linux server you can install one in a VirtualBox VM or a Raspberry PI. ..or maybe you can port git to System 7? that would be cool
  4. LOOM

    TwinSpark Powercache incompatible?

    I've looked for the P34 number on other places before, because the P34 sticker is a bit faded (3 almost looks like 8, but I'm sure it says 34. Everything else matches) so I wanted to be sure - but the P34 is nowhere to be found on the silkscreen. I know the normal PowerCache cannot be used, but I've researched this before and found a manual stating that the Universal version can be used with the Maccon3 IIsi card.
  5. LOOM

    TwinSpark Powercache incompatible?

    If it helps; I have exactly the same card as ktkm, the sticker in the lower left corner (front) says P34. ©1992 and the same card as in figure 22 in the manual, page 53. I've tried to use it in my Asante MacCon3 IIsi. According to the manual it should work, but the IIsi shut itself off at the second I turn it on so I'm not sure what's up with that.
  6. LOOM

    Bringing a Mac Plus back from the dead!

    I'm no expert in this so I've waited for other to reply you, but here is my understanding of this: They can work, but if the capacitor have a lot higher voltage rating than the original part then they can have trouble forming. Lower voltage caps also have lower ESR, important in switching power supplies. Cheap general purpose capacitors usually have higher ESR and shorter (shelf) life (in hours) than the more expensive ones, so I always try to buy the one that lasts longer when I want to recap. I usually stick to KEMET, Nichicon or a brand type. Just an example, the KEMET ESY series is built for switch mode power supplies, and up to 5000 hours
  7. LOOM

    Bringing a Mac Plus back from the dead!

    The original cap you replaced have cracked the same way as mine had. I replaced them with a KEMET PME271Y Series, DigiKey part number 399-5411-ND. These look the same as the originals. I have a euro mac plus, so these are rated 250VAC.
  8. LOOM

    Bringing a Mac Plus back from the dead!

    That reminds me of this thread: https://68kmla.org/forums/index.php?/topic/22511-mac-plus-tripping-home-electric-when-switched-on/ Recapping C33 and C36 fixed that issue for me (it tripped the fuse at home). When I opened it those two were cracked open. You probably want to order new ones, and order the correct capacitors with the original voltage for those you didn't have the correct value of at the same time
  9. LOOM

    Booting Mac Plus with scsi2sd...

    In later, I think he mean the v6 board, because that another board design/code than the v4 board. http://www.codesrc.com/files/scsi2sd-v6/vs http://www.codesrc.com/files/scsi2sd/
  10. LOOM

    PowerBook 100 Recap woes

    I didn't know about that trick. Good to know!
  11. LOOM

    PowerBook 100 Recap woes

    Old drives are on the end of their lifetime for several reasons, and will die eventually. Sometimes the oil around the ball bearing dry out over time, makes it harder and harder for the disk/motor to spin it up (sometimes you can use a small trick to boot it a last time by warming (with a hair dryer) the spindle so the oil/bearings flow more easily, but it's on your own risk and the disk can be worse after this so use it as a last step just to get the data out). I even got a disk to spin up a last time just by tapping on it with my finger when it tried to "start", just so I could save the data on it. Mechanical parts will fail and need to be replaced or fixed.
  12. LOOM

    Repairing a very damaged Mac Classic

    Where do you find the exact part number of these items? It would be nice to know where to look when you want to replace or troubleshoot something
  13. LOOM

    Adding Wi-Fi to my Mac SE/30

    Great project! I've been looking for a module like that myself just to bridge the vintage computers from their local switch to the wifi router. I'm currently using a raspberry pi with a wifi dongle, but it's a bit overkill and unreliable. Why? What happened? I'm still looking at his website from time to time to see if he have anything new 68k related in the works, but it seems pretty quiet these days
  14. LOOM

    Repairing a very damaged Mac Classic

    Did you check that the pins between the MOSFET and the other components have a connection? Maybe it burned up traces further behind, so check the surrounding components.
  15. LOOM

    Quadra 700-era monitor stand

    It's the Apple Universal Monitor Stand. Here's mine:
  16. LOOM

    Mac IIsi: The Matter of Video

    I got a Samsung 19" LCD Syncmaster 940BW from 2007 with a mac-to-vga dip switch adapter that works on the stock IIsi, so it will work with newer LCDs too.
  17. LOOM

    The suction cup pins broke

    Yeah, I should have flexed the pins, but it sounds like the fix is ok after all. Thanks, guys!
  18. I detached/pulled off the suction cup on the flyback transformer from the CRT tube on my Macintosh Plus to do some work on the motherboard. As I did that the pins inside the suction cup that connect it to the outer parts of the tube broke off when I pulled it out. I've marked the pins with an orange circle in this example picture: I therefore used some wire/string and shaped it as the pins and screwed it on the cup and attached it back on. I briefly tested the machine and it worked, but is there any danger to this? Do these pins have high voltage/current going through them resulting in this fix to be dangerous if the connection is bad? Will any current go to the "inner part" of the tube because they will bend outwards/the wire are too long or something? I'm not sure what this part do exactly. I also guess the wire won't press as firmly against the tube as the original pins in the suction cup would do. I just want to know what you guys think about my fix and if its good enough or maybe dangerous. I know there are some high voltage going through these parts so I want to be sure. I also used some black electrical tape to fasten the suction cup back on the tube after reattaching it ...
  19. I got hold of a Apple CD 300 (SONY CDU-8003A) drive that turns on and shows up on the SCSI bus when I list all the devices. I when I try to put a caddy into it, it just ejects the caddy instantly. I opened it up and cleaned the laser head with some alcohol, but it still acts the same way. After I cleaned it and put it together the caddy slot won't open automatically any more either, so I have to manually open it for the caddy to be ejected. Everything looked ok when I opened the box, no faulty hinges or anything I could see. Does anyone have a idea how to fix it?
  20. The cd caddy slot opens when I put a caddy into it, and then the "CADDY LOADED" slot comes down, but it won't go up any more until i push it up by myself. I didn't see any switches, but maybe there is and it came loose when I opened it? Or the caps on the board attached to the front bezel board are not working and have something to do with it.
  21. Yeah, I saw a few caps on the front bezel board. They looked ok, but maybe I should try to change them. I will need to look for the other too, thanks
  22. Being able to add the rsrc file directly into the project without DeRez+unrez would be amazing
  23. I'm on OS X so it seems like the Makefile wanted to run another 'echo' (maybe from the toolchain?), because when I changed 'echo' to '/bin/echo' in the Makefile it compiled successfully (and ran fine in BasiliskII). Thanks!
  24. I tried following this Code68k tutorial I've used before that works using Codewarrior, but I end up with the same error as when I'm trying to compile the retro68Test project. I'm not sure if it's the Retro68Test Makefile that is the problem, or if it's a toolchain bug: It seems like it adds some stuff from "rsrc-args" in the Makefile that shouldn't be there (see error above). If I comment it out the program will compile but crash when I run it. c-streams (another project using the toolchain) is using another Makefile, but gives out errors when linking StreamTest: stream.c:(.text+0x174): undefined reference to `alertf' That's why it should be nice to see a standalone Hello World-project with a simple Makefile we know works, to rule out our own bugs Edit; I can't get the Code tag to work.
  25. Is it possible to make a stand alone project/a Makefile that compiles using the toolchain as an example I can build upon? Because the examples in the build folder have been auto generated by cmake, so I'm not sure how that work. I managed to almost fix one by looking at c-streams and Retro68Test, but it seems like they have problems finding the Rez data.
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