Will copper shielding fix a ground buzz?

[Chuck H]

A bit scratching or abrasion may help, especially if the aluminium is old, dirty etc.. Put a couple drops of oil on aluminium at point you are going to solder. Then solder normally, the tip & solder inside the oil drop.

Sounds dubious. Will try it

[okabass]

Here's a pic.
https://www.dropbox.com/s/3yu1zsl3j6....54-2.jpg?dl=0

[Steve A.]

A bit scratching or abrasion may help, especially if the aluminium is old, dirty etc.. Put a couple drops of oil on aluminium at point you are going to solder. Then solder normally, the tip & solder inside the oil drop.

Rick Turner was referring to aluminum FOIL not a piece of aluminum metal. FWIW when I was HVAC service manager at Walnut Creek Sheet Metal in the 90's I had a really nice articulating 7 foot step/extension ladder which got damaged. While everybody said that it could not be welded our #1 welder did a great job repairing it (he first showed me how he could weld on the top of an aluminum coke can!)

Steve A.

[okabass]

Rick Turner was referring to aluminum FOIL not a piece of aluminum metal.

Steve A.

So did I. I understand that we're just talking aluminiumfoil (shielding). Look the pic.
https://www.dropbox.com/s/3yu1zsl3j6....54-2.jpg?dl=0
I'm not an expert, but I think aluminium has welded for decades.

Sorry to ask. But you have a finnish surname. Finnish ancestors?

[rjb]

Found this: