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Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
I did just th same but used zinc chloride instead of oil (wich is supposed to protect from and dissolve the existing oxide; I wasn't even close to soldering it!
I blame my weak iron and impure ZnCl2 (I left some carbon in it after I foolishly tried to mix it with wooden stick).
I've previously sanded a hell out of that piece but it still didn't work. Not to jack the thread anymore..
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
A Faraday cage is a very important piece of lab equipment when playing with high frequency coils. It saves EMI hassles and painful RF burns. So I don't have a problem with discussion of how to make one.
Aluminium is difficult to solder with ordinary soldering irons. I've never managed it: when I need to make electrical contacts to aluminium I always use nuts, bolts, and star washers. So if I was building a Faraday cage, I'd choose a different material. In fact, when I think about it, I'd just use an old microwave oven. It's a Faraday cage with a door that can be picked up at the kerb free, as long as there's not anything too vile inside
WaveRider, does the oven door seal work for 14MHz as well as microwaves? I don't know, I seem to recall that it's a choke joint tuned to the operating frequency.
Banned on 3/17/2009. Registered Member #487
Joined: Sun Jul 09 2006, 01:22AM
Location:
Posts: 617
I managed to solder a peice of wire to an aluminum tube. I used household oil on the tube after I sanded it. Then turned a fat tip iron all the way up to 800 degrees. It took awhile and I managed to get a good solder joint in one spot but honestly I would take Conners advice and just use something diffrent. It's not worth the effort. What about chicken wire? It's steel isn't it? That can be soldered if need be. Maybe make a wooden frame and wrap chicken wire around it.
Registered Member #29
Joined: Fri Feb 03 2006, 09:00AM
Location: Hasselt, Belgium
Posts: 500
The microwave door should work well with a few simple modifications. I would strip the door seal area to bare metal and put copper braid or fine finger stock to make a good electric seal.
In my faraday cage, I used 1cm galvanised steel hardware mesh. Piss easy to solder and cheap as chips (I paid 7.5 euros for 5 meters x 60cms.)
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smaller coils (and a 12MHz target)
, but so far it looks amazing. I wish I knew how to make a 4 coil plasma speaker!