Jump to content

pinto_guy

6502
  • Content Count

    80
  • Joined

  • Last visited

Profile Information

  • Gender
    Male
  • Location
    Palo Alo, CA

Recent Profile Visitors

789 profile views
  1. I might have found a solution that does not require removing the voice coil top magnet. I simply use a water hose washer, the flat kind that's usually orange/brown. I cut about a quarter of it, and insert it between the two magnets, in the space directly to the left of the preamp PCB. Somehow the dimensions are just right. This piece of rubber fits snuggly by friction, and it prevents the actuator from touching the gooed crash stop bumper. I "fixed" two drives that way, one single and one double platter, and they both work. See photos below.
  2. Thanks Ken for this comment. And I saw the video on this that you recently posted on youtube. That's great !
  3. pinto_guy

    Walkmac

    Very much agree. This could explain was this product was not a commercial success
  4. pinto_guy

    Walkmac

    I uploaded this youtube video with footages of the system in operation, FYI
  5. After facing this problem with some of my Mac Plus-es (and also the 512k), I found this thread, as well as this earlier one. This helped me greatly. To add to it, I checked some 7-8 of my spare drives, and found two different types with respect to this red stripe/yellow stripe issue. All the ones that accept red or yellow have the Omron R2DG-31 eject motor (top one in photo). The ones that only take the yellow ribbon have the later R2DG-38 motor model (bottom one), that was also used in the 2MB high density Sony drive
  6. pinto_guy

    Walkmac

    @Kai Robinson, this MacColby is simply a Macintosh 512k refurbished into a bigger box that can be transported. So the CRT, LB, AB, floppy, mouse and keyboard are all stock Macintosh parts. Colby mostly (only ?) sold a kit that allowed people to assemble Mac components into the Colby box. In Colby's estate, one of us found an old betamax video tape that describes how to do the assembly. He was able to read that tape and upload the content to the Internet Archive, for computing history's sake. It's a 1h:30mn of lengthy assembly instructions, but you could get the jist of it by skipping at will.
  7. pinto_guy

    Walkmac

    @JDW, as we discussed privately, I have been in touch with Karen Colby, Chuck Colby's widow. She is a great woman, and she has been very supportive of our effort to rehabilitate these rare pieces of hardware. She actually was very much hands on in the business, quite a change from her original education as a medical nurse. She confirmed the date when Chuck passed away, on Sep 22, 2018. She also indicated that he had requested privacy, which explains why the vintage computing community at large did not know that he had passed. The last piece of Colby's hardware that was left for me
  8. Sorry it took a while. I actually banged my head hard on this one but I finally found the source of the trouble. The trimpot R55 was slightly bent, and the lead to one pole was broken. This trimpot adjusts the height of the video on the AB. This was not really visible to the naked eye, but only with a magnifier. I must have pressed on it with my fingers at some point, which led to the breakage. So everything works now, and it's a cute little machine. I took some video shots that I will edit and post on youtube at some point. Thanks all.
  9. pinto_guy

    Walkmac

    Well, the "Apple Muzeum" in Poland did not waste any time after they received the Walkmac that they bought off our eBay auction. See their blog here Good to see that Chuck Colby's legacy is expanding overseas
  10. pinto_guy

    Walkmac

    How many years does it take to NOT be a newbie on this forum ? I've been posting here since 2014 Anyway, many thanks to everyone for their support. @JDW, I did feel that you were a bit forward and inquisitive and I much appreciate your apology. But to be fair, the drama that ensued bothered me more than your initial post. This was never my intention to hide how I got involved in this. A few months back, I did inquire about a sale of 400 boxes from the Colby estate, from a Craigslist ad. I met with the owner who was a friend of Chuck's, and who purchased his home on Al
  11. Thanks. The flyback crossed my mind, but I did have a pretty strong spark when I discharged the HV connecter to the CRT. Also, I do have a strong single point in the center of the screen after I disconnect J1. Anyhow, I'll start the detective work soon. It's most likely a problem in the vertical raster circuit. Yes, the twin floppy is handy. Turns out that the 128k LB has capability for two FDDs 9internal and external). The was Colby did it was to daisy chain both with one ribbon cable, and simply connect the FDD2 enable signal from the pin 17 of the external FDD connector to the s
  12. pinto_guy

    Walkmac

    I now have some credible information that he passed away in September 2018
  13. pinto_guy

    Walkmac

    Nobody is quite sure when he passed away, but we estimate it was about 2 years ago. Actually this week-end, we held a huge estate sale and disposed of all the remaining stuff from the 400 boxes that he left behind.
  14. My current project from the Colby estate is to revive a MacColby (1st pic). When I first turned it on, I actually got a loud bong, and the usual floppy question mark, so I was elated (2nd pic). It took me a while to de-stuck the two floppy drives, and I could get everything going in record time. Alas, just as I put everything back together, two new problems popped up. One was an easy fix (one FDD stopped ejecting), but the other one puzzles me: the screen all the sudden turned black. Not the J1-solder joint-problem black, but more like a fuzzy bright zone at the top of the screen (3rd pic). Be
  15. pinto_guy

    Walkmac

    If anyone interested, it's now on eBay https://www.ebay.com/itm/193747790896
×
×
  • Create New...