Those early 2001's had an interesting difference. The contacts for the cassette recorder connector were on the bottom of the board. The ones on the top of the board were not connected to anything. Later models had the functional contacts on the top of the board. The cassette recorder that came with it had contacts to match the connector. If you tried to use a recorder from a later PET, nothing would happen. This was very frustrating, having to find the correct recorder for an odd computer. I finally had to drill a hole through the contacts and solder a wire to connect both contacts. On Thu, 7 Nov 2019, Santo Nucifora wrote: > All eight of my PET 2001-8s are different variations; some subtle, some > major but they all have a chicklet keyboard and a tape drive (except for > one that was modified to add an aftermarket keyboard but it's easily > reversed). I need to take some better pics to highlight the differences. > > My earliest PET 2001-8 is serial number 10051 (number 51) and this unit is > somewhat different from serial number 10171 which is not that far off. > Differences include a solder maskless motherboard, a different early analog > board in the monitor section and a folding "kickstand" in the earliest. > The later one has the normal kickstand we all know and love and the normal > early motherboard. From 10171 to 10895 PETs went from black bezel to blue > somewhere in that range. Anyway, it is on my list to document each of them > with pictures. > > They are definitely one of my personal favorites too. > > Santo > > > > On Thu, Nov 7, 2019 at 7:36 PM Bill Degnan <billdegnan_at_gmail.com> wrote: > >> 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 >>>>>>>> >>>>>>> > wlevak_at_sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.orgReceived on 2020-05-29 23:36:52
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