JDW
Well-known member
I posted about this prior to the 68kMLA server crash, but since the data was lost I felt it time to review my past work and post an update.
As many of you know, I have 3 sets of classic Macintosh analog board photos. The photo that I have of the 661-0462 was acquired from an associate, and until very recently I did not own the latest edition Mac Plus Platinum board. As luck would have it though, I was finally able to acquire a brand new Apple Service board for only $0.99 (plus shipping to Japan) and have made the time to compare its components with that of the other two analog board revision that I own.
My updated analog board table is presented in MS Excel format. Since I now have all three board editions, I was able to accurately compare the components among the three. Are there other board editions? I would assume so based on one of my boards having an "E" at the end of its model number. I take it there must have been "A" & "B" & "C" & "D" as well, but without actually seeing such boards it's difficult to say. Apple very well could have just jumped from no letter at all to "E." Nevertheless, the absolute latest edition of this early analog board was the Plus Platinum 661-0462 edition, which sports the latest HF (high frequency) capacitors and high temperature rectifiers.
If any of you have examined your own analog boards and would like that data added, I would be happy to do so. Also, there are some parts of the comparison table that I have marked with a question mark because the specification was indiscernible. If you know the correct value and can prove it, I would be happy to add it to the chart.
Hopefully this information may be of use to those of you who wish to upgrade or repair your existing analog boards. I have included Digikey part numbers where relevant to aid you in finding the best replacements. Enjoy.
As many of you know, I have 3 sets of classic Macintosh analog board photos. The photo that I have of the 661-0462 was acquired from an associate, and until very recently I did not own the latest edition Mac Plus Platinum board. As luck would have it though, I was finally able to acquire a brand new Apple Service board for only $0.99 (plus shipping to Japan) and have made the time to compare its components with that of the other two analog board revision that I own.
My updated analog board table is presented in MS Excel format. Since I now have all three board editions, I was able to accurately compare the components among the three. Are there other board editions? I would assume so based on one of my boards having an "E" at the end of its model number. I take it there must have been "A" & "B" & "C" & "D" as well, but without actually seeing such boards it's difficult to say. Apple very well could have just jumped from no letter at all to "E." Nevertheless, the absolute latest edition of this early analog board was the Plus Platinum 661-0462 edition, which sports the latest HF (high frequency) capacitors and high temperature rectifiers.
If any of you have examined your own analog boards and would like that data added, I would be happy to do so. Also, there are some parts of the comparison table that I have marked with a question mark because the specification was indiscernible. If you know the correct value and can prove it, I would be happy to add it to the chart.
Hopefully this information may be of use to those of you who wish to upgrade or repair your existing analog boards. I have included Digikey part numbers where relevant to aid you in finding the best replacements. Enjoy.