WD-40 leaves a residue that attracts dust. This alcohol+oil method flushes oxidation then leaves a clean, thin lubricant film. 7. The "No-Drill" Ground Bus for a Metal Desk The problem: Your station ground needs a common bus bar, but you don’t want to drill into your nice metal desk or filing cabinet.
Strip the insulation off a length of stranded hookup wire (16–22 AWG). Unravel the braided shield or simply flatten the stranded core. Dip the bare copper in rosin flux (paste or liquid). Apply your soldering iron to the joint and touch this makeshift wick to the molten solder.
Now get on the air—and keep the hints coming.
By WB2FAS (In the spirit of the original QST column) New- Hints and Kinks for the Radio Amateur
Loosen the element set screw. Slide the element until it touches the clamp. Tighten. Check SWR. Move clamp up or down by measured inches. No more lowering the mast 15 times. 6. Cleaning Potentiometers Without Deoxit (Field Hack) The problem: Scratchy volume or tone control on your vintage receiver, and you’re out of contact cleaner.
Use rare earth magnets (neodymium, 1/2" diameter or larger) with a screw hole in the center. Screw a copper ground lug directly to the magnet. Stick the magnet to the metal desk. Connect all your gear grounds to that lug via short straps.
Not always, but in a pinch, stranded 18-gauge wire soaked in flux outperforms no wick at all. Keep a 6" piece pre-fluxed in a tiny ziplock bag in your go-kit. 3. The "Eyeglass" SMA Wrench (Free & Perfect) The problem: SMA connectors need to be finger tight plus 1/8 turn . Overtighten, and you’ll snap the center pin or ruin the female receptacle (especially on cheap HTs or SDR dongles). WD-40 leaves a residue that attracts dust
Stick a metal ruler (12" or 24") directly to the fiberglass or wooden mast using double-sided foam tape, aligned vertically with the antenna element. Use a small spring clamp or a plastic clothespin on the ruler as a temporary stop.
Use vulcanizing silicone tape (often sold as "rescue tape" or "self-fusing silicone tape"). It’s about $8–10 per roll. Stretch it 100% as you wrap—it fuses to itself into a solid rubber sleeve.
Use a metal eyeglass repair screwdriver (the flat kind that comes in those little keychain kits). The tip is exactly the right width to fit into the two holes of a standard knurled SMA plug. Insert the tip into one hole and use it as a lever for that final gentle snug. The "No-Drill" Ground Bus for a Metal Desk
Remove the knob. Drip 2–3 drops of isopropyl alcohol (91% or higher) into the shaft opening. Rotate the pot back and forth fully 20–30 times. Let it dry 5 minutes. Then add one tiny drop of lightweight machine oil (sewing machine oil or even 3-in-1) to the same spot. Rotate again 10 times.
Buy a silicone baking mat (meant for cookies, about $10–15). They are heat resistant to 450°F, non-slip, and have a slight lip. The best part: the non-stick surface means solder balls don’t adhere—they just roll into a corner for easy vacuuming.