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Chapter 2. Active Deskchop: > Finishing - Pg. 50

Active Deskchop An electronics soldering iron isn't up to the task, due to the heat-sinking properties of large masses of metal, which suck heat away from the site as quickly as your 20-watt pencil can produce it. I managed to get a workable solder joint on a test set-up with one of those Weller pistol-grip soldering guns, but it took about 20 minutes to get the bed area hot enough to pre- tin. It's doable, but why bother, when a proper torch is cheap, easy, and useful for so many other things (plumbing repair, paint removal, caramelizing your crème brûlée . . . the list is endless). Cut your 1 / 8 " tubing to length, clean both surfaces with a bit of emery cloth, and apply a small dab of flux to the target area. (See Figure 02.29 , and be careful with that clamp, Eugene... crushed tubing is never pretty.) Clamp the components together snugly (brass is soft -- don't crush your bits), apply heat from the underside of the material until the flux smokes off, then touch the tip of your solder wire to the hot metal surface. It'll flow where it's needed. You're not welding here: this is not a strong-like-bull joint, but it's enough for our purposes. [Figure 02.30] Let the joint cool and clean off the the remnants of the flux