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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...

Thanks Ken for this comment. And I saw the video on this that you recently posted on youtube. That's great !

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

I uploaded this youtube video with footages of the system in operation, FYI

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...

@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...

@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...

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...

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

How many years does it take to NOT be a newbie on this forum ? I've been posting here since 2014  :mellow: 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...

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...

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

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.

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...

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

And here are the two cousins after restoration. We'll put one up for auction on eBay soon.

No, same size. Probably an optical effect

Gents: I was able to fix all three of the 2nd generation Mac Plus Walkmacs that we had (see photo of the three brothers below). I sold one privately, and keeping one for myself. We have just listed the third one on eBay here FYI

One of my friend in crime found this old Infoworld article. So it does appear that this model was destined to be commercialized.

Here is another system that I worked on in the last few days. It looks like perhaps a prototype to the commercial Walkmac. It is also based on a Plus, and features what looks like to same plasma display, although this screen is powered directly from the computing unit. It features similar...