I bought a pallet of macs

[DragonKid]

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...

 

[K55]

WTF man :O



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.

 

[Paralel]

What purpose was the paperclip serving on the FBT?

 

[olePigeon]

Only the 4th picture seems to be loading.

 

[K55]

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:



128k rust:



de rusted:



rust coated:



booting sortof:



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

 

[Elfen]

What system are you booting on the 128K?

Derusting job looks professional - congrats.

 

[CompuNurd]

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...

 

[Elfen]

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.

 

[K55]

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.

 

[olePigeon]

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.

 

[K55]

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.

 

[Paralel]

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.

 

[olePigeon]

Can you tell me which brand you used?  I'd like to get the black stuff.

 

[Elfen]

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

 

[K55]

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.