Perfect restoration of a 1977 Commodore PET 2001, Part 1
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- Опубликовано: 10 сен 2024
- I very carefully restore a 1977 Commodore PET 2001 computer, one of the very first home microcomputers. The restoration involves all elements of the device, from case, to monitor, to the details of the microelectronics. No expense is spared to get a perfect result.
If you are fed up with fake computer restoration videos on RUclips, rejoice, for this is the real deal. The techniques applied respect all appropriate precautions, so although the restoration process is very invasive, no damage at all is caused. The end result speaks for itself.
Part 2: • Perfect restoration of...
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This was the first computer I bought in 1980, upgraded the soldered 8k ram to 32k. Great job for the restoration!
Seeing a PET getting treated with this level of respect will never fail to fill me with joy. You'd be surprised how much these things can handle, my 2001-N was covered in a thick layer of oil inside and out! I'm guessing it was at some point used to operate industrial machinery
Cheers!
Glad to have you back after finished your own computer Cerberus!
Already busy with the next own computer in parallel ;-)
@@thebyteattic Glad to know!
Results are impressive in this Part 1, I already can't wait for part II!
Thanks! Part 2 has just been published.
Bernardo has reinvented himself as Marcel Marceau 😜 Such a lovely board the Pet - came up beautifully. Looking forward to the next part 👍
:-)))
I have enjoyed watching your work. Great, that you take care of ESD. For the pin corrosion, a glass fibre pen might be the weapon of choice. Looking forward to the next part.
Coming soon, glass fiber pen and all :-)
Love to see this. Finally someone takes ESD seriously,. especially with TTL and NMOS.
And nice to se usage of distilled water and surfactant, I always find it a little bit barbaric when people wash their MObo under shower :)
I have to admit I laughed out loud when I saw the air blower. That nasty concoction of dust and goo wasn't going to budge. It might work OK on mere 10 year old dust, but 40 year old dust is made of sterner stuff from a different time! Washing the PCB is always the best way. I prefer to use Alconox. It's a very mild lightly alkaline lab-grade detergent that rinses off spotlessly. If you want to make the drying out section of the process a bit quicker, give the PCB a thorough dunking in IPA. It will bond to any remaining water and the board dries very quickly, even without an oven.
Excellent Job!
:-)) Yeah, I wasn't hoping the air blower would clean it completely. I always intended to give it a bath. But to do so I needed to remove all the socketed ICs first, so the board needed to be at least touchable and the ICs identifiable. That was the idea.
@@thebyteattic Excellent point! You do need to know where to put the IC's back.
@@HutchCA A valid point with machines like this.
Just curious, I'm really surprise it is safe to bathe the board in distilled water like you do,with all the passive components and all the soldered ICs. I would have though it to be harmful (for the board I mean).
Not really. What is harmful are the dissolved minerals in (hard) tap water. With distilled water there is none of that. As long as you dry the board before you turn it on (and dry the board quickly, before oxidation starts), it's no problem. Normally I don't bathe boards unless absolutely necessary, because distilled water costs some money and hassle. But in this case it was indeed absolutely necessary.
Large PCB fab facilities have board washing machines that do essentially the same thing on completed assemblies.
I've just picked up an old PET which turns out to be the very first machine to be imported into the UK and therefore probably the oldest in the country. I bought it from the co-founder of Compsoft, a successful UK software firm in the 70's/early 80's.
The serial number is 1000367.
Now I need to find a reputable restorer! Preferably in the UK but beggars can't be choosers. Can anyone point me in the right direction?
Cheers