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JDW

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About JDW

  • Birthday 02/25/1971

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  • Website URL
    https://www.youtube.com/c/JDW11

Profile Information

  • Gender
    Male
  • Location
    Aichi-ken, Japan
  • Interests
    Church, family, travel around Japan, Mac computing, graphic design, web design, photography, videography, Newton 2100 PDA, System 6 fun on an SE/30

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  1. It’s been long in coming but I finally kicked it out today. Yes, even your working order Mac 128K through the Plus can use a recap. A video INDEX is in the text description on YouTube to help you easily refer to different sections of this 1 hour video. Even if you aren't interested in a recap, check out the bad Flyback segment where it lights up in the dark!
  2. After recapping my Mac512's Analog Board and booting either from a floppy disk (in the internal 400k drive) or booting from the FloppyEMU, with the case back off, I can faintly hear some beeping sounds coming from the area of the analog board, but it doesn't seem to be the speaker that I can tell. Here's a recording of the entire boot sequence, booting off the FloppyEMU: Mac512k_FloppyEMU_BootSounds.mp3 Honestly, I can't remember if I had heard these sounds before the recap, since I normally have the case on. The flyback is good (and tested in a dark room), but it wouldn't make beep sounds anyway, and certainly not during floppy access. Again, there are no sounds like this at all normally. The sounds only occur during floppy drive access, whether the 400k drive or the externally connected FloppyEMU. Voltage is a rock solid 5.0V during the floppy drive access, so that isn't an issue. I also checked the voltage on a scope, before and after the recap, and there was no change after the recap. I recapped the motherboard (stock 512k, with 64k ROMs) many years ago using tantalum capacitors. I'd appreciate hearing your thoughts.
  3. JDW

    SE/30 Power Supply: Recap or ATX?

    Ah, the memories! I worked as a repair tech for MicroAge in Fresno, CA during my senior year in high school in 1989. The SE was still being sold then, but the hot item in the store I gawked over was the lovely IIci! Totally unaffordable for me at the time ($6k+ retail), but boy I wanted one. Ultimately, I ended up buying a IIvx in '93 with a college student discount -- a machine Apple notoriously killed off only months later. A year after that, I recall spending $1,000 of my hard earned pennies on a Quadra 650 logic board upgrade for it, which made it a very usable machine.
  4. JDW

    SE/30 Power Supply: Recap or ATX?

    Yes indeed. You can see and hear a 60x25mm Noctua in my SE FAN VIDEO here.
  5. JDW

    SE/30 Power Supply: Recap or ATX?

    One of the comments below that product listing says this: Physical size is another issue to consider: RP-FLEX-350W = 193mm x 152.4mm x 58.4mm SEASONIC SSP-250SUB = 150 mm (L) x 81.5 mm (W) x 40.5 mm (H) We know the SEASONIC fits nicely inside the metal PSU enclosure of the SE & SE/30, and using that enclosure is nice because it has the power switch built-in along with the power plug.
  6. JDW

    SE/30 Power Supply: Recap or ATX?

    Use the SONY CR-44 PSU as a frame of reference for the voltages and minimum Current output you will need: +5V: 6.0A +12V Sweep: 1.25A +12V Disk: 2.1A -12V: 0.5A Sweep and Disk are not isolated, so you could drive both with a single +12V power line rated at 3.35A or higher. And no, a -12V line rated at 0.3A is not acceptable, in my opinion, since the -12V line of the SONY is 0.5A. Even if a power supply has +5V, +12V and -12V outputs, if the current for any of them is lower than described above, it would be unwise to choose such a replacement power supply. Another benefit to the SONY CR-44 PSU is that it's complete fanless, unlike any replacement PSU you may be considering (including the SEASONIC).
  7. JDW

    SE/30 Power Supply: Recap or ATX?

    If it is indeed “broken,“ how then can they write raise the price to $250? Still no reply yet from Seasonic Taiwan.
  8. JDW

    SE/30 Power Supply: Recap or ATX?

    Either will work as an SE/30 PSU. I must say though that is the first vendor I've seen who is selling the 300W at the same price as the 250! Wow.
  9. JDW

    SE/30 Power Supply: Recap or ATX?

    Thanks. I see they accept lower price offers too. Interesting.
  10. JDW

    SE/30 Power Supply: Recap or ATX?

    Higher than $49, but much cheaper than $109. Do you have a link to the seller? It might prove useful for some people, since I've not yet heard back from Seasonic. Thanks.
  11. JDW

    SE/30 Power Supply: Recap or ATX?

    @thxkbye Thank you for your kind words. I am actually putting the finishing touches on a new Analog Board recapping video right now, which focuses on the Mac 128k~Plus. It has an interesting section that shows what a bad Flyback transformer looks like in the dark, so stay tuned for that!
  12. JDW

    SE/30 Power Supply: Recap or ATX?

    The problem I see in a potential recap of your board is that a fair amount of the bottom copper is rusted/rotted underneath the green solder mask. A recap alone without addressing that problem would not be advisable. The condition would grow worse over time and it also could prevent even a recapped board from working properly. You would need to try to carefully scrape off the blackened solder mask to examine the copper underneath to determine how much of it is left. As to use of your existing ATX power supplies, assuming they would physically fit, you will need to tell us the electrical specifications so we can tell you if it would be safe to use. Also keep in mind that many ATX PSU's have a fan, and whether that noice would be a bother to you is something you would need to decide. I now see that the only SEASONIC available on Amazon is the SSP-300SUG, selling for a rather high $109. I used the SSP-250SUB which cost about $49+shipping. The manufacturer's web page doesn't say anything about the product being End of Life, so I sent them an email just now to inquire further. I told them that their response to me would be presented to the vintage Mac community, and that a price of about $49 is what we are looking for. Let's see what they have to say.
  13. With all those settings, what we really need is some good documentation about how to properly use Sony Test.
  14. JDW

    SE/30 PDS Adapter Epic Blunder

    Yes, and I plug a MacCon PDS Ethernet card into the PDS connector atop my DiiMO, which really makes the DiiMO shine in the SE/30 over the PDS version PowerCache. The socketed PowerCache of course eliminates that problem altogether, leaving your PDS slot free.
  15. JDW

    SE/30 PDS Adapter Epic Blunder

    I wasn't aware the DiiMO's FPU only ran at 25MHz (i.e., "half of the card's speed"). Even so, my DiiMO still bests my PowerCache by a small amount in the benchmarks, every time I run them. Hmmm...
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