So, my 2001-8 is a later model with the blue front color. I would like to learn more detail about the pet model revs. I did not think I had an early 2001-8, but I'd like to get one some time just cause they're a personal fav.. Bill On Thu, Nov 7, 2019, 6:46 PM Mike Stein <mhs.stein_at_gmail.com> wrote: > If it's long enough I suppose they could have run a separate ground wire > to the metal monitor case as they did on some of the later models. > > ----- Original Message ----- > *From:* Santo Nucifora <santo.nucifora_at_gmail.com> > *To:* cbm-hackers_at_musoftware.de > *Sent:* Thursday, November 07, 2019 6:28 PM > *Subject:* Re: hi res pic of 2001-8 power supply smoothing cap wiring > > > > On Thu, Nov 7, 2019 at 6:11 PM Mike Stein <mhs.stein_at_gmail.com> wrote: > >> "I checked 8 2001-8s from 10051 to 41072 from 4 wire in the earliest to >> 6 wires in the latest." >> ------------------------------------------------- >> >> Curious; any idea what the 6th wire is for? I've only seen 4 or 5 wires. >> >> > Mystery solved for me. The fourth black wire goes nowhere :) This is a > PET 2001-8 Professional computer at serial 41072 which is pretty late, i > think. > > > http://vintagecomputer.ca/wp-content/uploads/2019/11/Pet-2001-PS-wiring-03.jpg > > > > >> It's pretty straight forward; the two brown wires (transformer terminals >> 4 & 6) are the 16V AC or so that go to J8 pins 1 and 5; terminal 5 (centre >> tap and ground) on the transformer goes to the negative cap terminal and >> from there to pin 3 and also optionally to chassis ground (all black). >> >> Pin 4 is rectified unfiltered 8V DC from the PC board and goes to the >> positive cap terminal and from there back to the board filtered on pin 2, >> both red. Accessory boards with on-board regulation often connect here. >> >> Note that the plug J8 can plug in either way. >> >> Keep the J8 pins clean; it is notorious for overheating and burning the >> pcb if it gets some oxidation etc. that increases contact resistance. >> >> m >> >> >> ----- Original Message ----- >> *From:* Santo Nucifora <santo.nucifora_at_gmail.com> >> *To:* cbm-hackers_at_musoftware.de >> *Sent:* Thursday, November 07, 2019 4:50 PM >> *Subject:* Re: hi res pic of 2001-8 power supply smoothing cap wiring >> >> I checked 8 2001-8s from 10051 to 41072 from 4 wire in the earliest to 6 >> wires in the latest. I can confirm all blacks are on one terminal and all >> reds on the other. >> >> >> On Thu, Nov 7, 2019 at 4:42 PM Bill Degnan <billdegnan_at_gmail.com> wrote: >> >>> http://vintagecomputer.net/commodore/2001-8/2001-8_sn20343.jpg >>> >>> 20343 >>> >>> I too have black wire(s) on the filter cap as you describe coming around >>> from an unseen origin. Is it as simple as all of the red so on one side, >>> black on the negative? I am looking through what I have for the schematics >>> for this model, until then I am just guessing. >>> >>> Bill >>> >>> On Thu, Nov 7, 2019 at 4:36 PM Santo Nucifora <santo.nucifora_at_gmail.com> >>> wrote: >>> >>>> I also have another model of 2001-8 that has an extra black wire >>>> clustered with the other black wires on the filter cap. It goes to the >>>> power socket under the transformer so I can't see where it goes but I would >>>> assume the negative terminal? >>>> >>>> What is your serial number range? The one I took pics of was 100895 so >>>> that one is kinda early. >>>> >>>> >>>> On Thu, Nov 7, 2019 at 4:27 PM Bill Degnan <billdegnan_at_gmail.com> >>>> wrote: >>>> >>>>> Unfortunately I don't think we have the same model, here is what I >>>>> have not mine but same transformer) >>>>> http://www.8bit-homecomputermuseum.at/repair/bluepet/bluepet.html >>>>> >>>>> Bill >>>>> >>>>> On Thu, Nov 7, 2019 at 4:18 PM Bill Degnan <billdegnan_at_gmail.com> >>>>> wrote: >>>>> >>>>>> >>>>>> >>>>>> On Thu, Nov 7, 2019 at 3:46 PM Ville Laustela < >>>>>> ville.laustela_at_gmail.com> wrote: >>>>>> >>>>>>> >>>>>>> Here are two crops from my old photos, perhaps these are of some use: >>>>>>> https://postimg.cc/VSR5yLqp >>>>>>> https://postimg.cc/GHW4Gf37 >>>>>>> >>>>>>> — >>>>>>> Ville >>>>>>> >>>>>>> >>>>>> These photos are from a newer model, but thanks anyway. >>>>>> Bill >>>>>> >>>>>Received on 2020-05-29 23:34:12
Archive generated by hypermail 2.3.0.
