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I bought a pallet of macs
Posted by: DragonKid on 2016-02-28 18:01:18
This had to be the most worstest badish repaired mac I've ever seen. I had to sub in a plus analog board because the flyback transformer on the original was a paperclip soldered onto the wire, the capacitors were all replaced with 50v """made in china""" versions, and the board exploded once I checked everything was working. 🙁

DID I MENTION THE FLYBACK TRANSFORMER WAS A PAPERCLIP :O
Do you have any pictures of this monstrosity?  I'm curious how on earth somebody put a paper clip where the FBT belongs...
Posted by: K55 on 2016-02-28 18:15:58
WTF man :O

20160228_211230.jpg

Excuse the dirty hands, just got done changing the oil in the car. :approve:

There was another paperclip on the FBT, but that vaporized in the earlier explosion.
Posted by: Paralel on 2016-02-28 20:00:20
What purpose was the paperclip serving on the FBT?
Posted by: olePigeon on 2016-02-29 08:32:11
Only the 4th picture seems to be loading.
Posted by: K55 on 2016-02-29 20:33:38
What purpose was the paperclip serving on the FBT?
It was the metal piece that wraps around the outside part of the transformer, was soldered on to bridge a gap where the metal broke.

Only the 4th picture seems to be loading.
1 sec:

Rust:

20160228_115425.jpg

128k rust:

20160228_125524.jpg

de rusted:

20160228_161632.jpg

rust coated:

20160228_193008.jpg

booting sortof:

20160228_193959.jpg

Don't know why it says attached thumbnail, uploading pictures is kinda wonky for me atm. :-/

20160228_125531.jpg
Posted by: Elfen on 2016-02-29 22:16:13
What system are you booting on the 128K?

Derusting job looks professional - congrats.
Posted by: CompuNurd on 2016-02-29 22:50:56
It was the metal piece that wraps around the outside part of the transformer, was soldered on to bridge a gap where the metal broke.
If it's stupid but it works...
Posted by: Elfen on 2016-02-29 23:10:56
WTF man :O

20160228_211230.jpg
That's the standard chip for though it looks like it's a bit oxidized. You should be able to read it from a multimeter to one of the pins on the flyback transformer. It should read with some ohms since it is a dense winding of wires. But it should be cleaned up. Dirty conducts high voltage electricity.
Posted by: K55 on 2016-03-01 09:28:55
What system are you booting on the 128K?

Derusting job looks professional - congrats.
Thanks~

Its a floppy that says "Castle 1", was in the drive when I brought it 😛

I've ordered a few unformatted single and dual sided floppies from ebay so I'll eventually try and boot system 1 at some point.
Posted by: olePigeon on 2016-03-01 10:42:32
OMG that black chassis is awesome!!!!  What'd you use to make it black?  I wanna paint all my machine's metal parts black, now. 😀

Posted by: K55 on 2016-03-01 11:44:33
It's rust encapsulator, you can get it at most autoparts stores or from amazon. Every brand is a slighly different color, this one happens to be dark black, which looks pretty nice when painted. It's very liquid, much more so than regular spray paint, which means it's very easy to get runs (had a few on this board, but eh, its internal so 😛 ).

Main purpose is that it neutralizes rust, finish is somewhere between matte and eggshell.
Posted by: Paralel on 2016-03-01 12:27:43
If it's stupid but it works...
I kind of question if it ever worked. The difference in characteristics between copper winding and a paperclip, I just don't see it.
Posted by: olePigeon on 2016-03-01 13:46:23
Can you tell me which brand you used?  I'd like to get the black stuff. 🙂

Posted by: Elfen on 2016-03-01 17:13:04
I do not know what brand he used, but there is the Rustoleum paint and rust remover/converter. I've used it in the past

http://www.rustoleum.com/product-catalog/consumer-brands/krud-kutter/rust-remedies/the-must-for-rust-rust-remover-and-inhibitor
Posted by: K55 on 2016-03-02 11:30:15
Can you tell me which brand you used?  I'd like to get the black stuff. 🙂
http://www.amazon.com/Eastwood-Rust-Encapsulator-Paint-Aerosol/dp/B001E0HUYY

probably would be cheaper at your local autoparts store, but the stuff works.
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