The Fisher Gold Bug Family: 19 kHz Gold & Relic Detectors
Fisher has built detectors in the USA since 1931, and the Gold Bug is its dedicated gold-prospecting and relic line. The reason it works where coin machines don't comes down to frequency: standard detectors run 6–13 kHz, optimized for high-conductivity coins, and a fraction-of-a-gram gold nugget barely registers. At 19 kHz the Gold Bug's field reacts far more strongly with small, low-conductivity targets, so faint gold turns into a signal you can act on instead of noise you'd dismiss. Computerized Ground Grab balancing tames mineralized ground so you can run the gain high and stay sensitive to tiny shallow targets. It's also light and simple — a machine a first-time prospector can learn fast and an experienced one will keep using. Comparing every gold-capable machine we carry? See the full gold detectors collection.
The Gold Bug Lineup, Explained
There are four machines in the family, and choosing between them is mostly about frequency and coil. The original Gold Bug runs 19 kHz with a small 5″ DD coil that fits into bedrock crevices and averages a tiny ground footprint for the hottest soils — the specialist's nugget-shooter. The Gold Bug DP ("Deep Penetrating") takes the same 19 kHz platform but ships an 11″ elliptical coil for more depth and ground coverage, making it a true multi-purpose detector for gold, relics, and coins alike. Stepping sideways, the Gold Bug Pro adds a Ground Phase readout that displays the actual soil-mineralization number, giving you more precise manual control on hot or variable ground. And at the top for pure gold sensitivity, the Gold Bug 2 jumps to 71 kHz — the most sensitive gold machine Fisher makes, built to hear the tiniest sub-gram nuggets that even the 19 kHz models can miss.
What the Gold Bug Does Best: Small Gold in Mineralized Ground
The Gold Bug earns its name in the dry washes, creek banks, and iron-saturated soils of gold country, where its 19 kHz frequency and fast computerized ground balance let it pull faint nugget signals out of constant ground noise. It's not only a prospecting tool, though — the same sensitivity to small, low-conductivity targets makes it a strong relic machine for buttons, bullets, and brass on iron-heavy historic sites, and it'll shoot coins too. Run it in All Metal for maximum depth on gold, or switch to Discrimination with notch rejection to filter iron and foil on trashy ground. Pair it with a pinpointer to speed recovery in bedrock cracks and deep gravel.
Coils for the Fisher Gold Bug
The Gold Bug accepts a range of coils so you can match the tool to the ground. The included 5″ DD is the crevice-and-hot-ground specialist; step up to the 10″ biaxial DD coil or the 11″ biaxial DD coil for more depth and coverage, or the big CORS Cannon 14.5″ × 10.5″ DD coil to maximize ground coverage and depth on open sites. Keep a spare lower rod or the lighter Anderson carbon rod on hand, and grab the free Fisher Gold Bug digital manual.
Fisher Gold Bug FAQs
What's the difference between the Gold Bug and the Gold Bug Pro?
Both run 19 kHz on the same platform. The Gold Bug Pro adds a Ground Phase readout that shows the actual mineralization number on the display, giving you more precise manual ground balance on hot or variable soil. The base Gold Bug keeps it simpler. If you hunt consistently mineralized ground and want fine manual control, the Pro is the upgrade; otherwise the standard Gold Bug finds the same gold.
What's the difference between the Gold Bug and the Gold Bug 2?
Frequency. The Gold Bug runs 19 kHz, which balances gold sensitivity with versatility for relics and coins. The Gold Bug 2 runs 71 kHz, trading some versatility for extreme sensitivity to the smallest gold nuggets — it's a dedicated prospecting machine for the tiniest targets. Choose the Gold Bug for an all-around gold-and-relic detector, the Gold Bug 2 for maximum micro-gold sensitivity.
What's the Gold Bug DP?
The Gold Bug DP ("Deep Penetrating") is the 19 kHz Gold Bug shipped with a larger 11-inch elliptical coil instead of the small 5-inch. The bigger coil adds depth and ground coverage, making the DP a more general-purpose detector that's strong on gold, relics, and coins, while the standard Gold Bug's small coil specializes in tight, hot-ground nugget hunting.
Is the Fisher Gold Bug good for beginners?
Yes. It has a simple interface with just the controls that matter — gain, discrimination, and a one-button Ground Grab balance — so a new prospector can be hunting in minutes, while the 19 kHz performance and adjustable settings give room to grow. It's a common first dedicated gold detector.
Is the Fisher Gold Bug waterproof?
The search coil is waterproof for working creek edges and shallow riffles, but the control housing is not rated for submersion, so keep it above the waterline. It's a land-and-edge prospecting machine, not an underwater detector.
What coils fit the Fisher Gold Bug?
The Gold Bug works with the 5-inch DD (included on the base model), 10-inch and 11-inch biaxial DD coils for more depth, and large aftermarket coils like the CORS Cannon for maximum coverage. The 10-inch coil also fits the Fisher F5 and Gold Bug Pro. All are stocked here.
Why Buy Your Fisher Gold Bug from Serious Detecting
We're an authorized Fisher Research Labs dealer, so every Gold Bug ships with the complete factory package and the full 2-year Fisher warranty. Our team runs the Gold Bug and Gold Bug Pro in the field, so when you call with a ground-balance question on your first prospecting trip, you reach someone who's used the machine in the kind of ground you're hunting. Orders over $99 ship free in the lower 48, local pickup is available out of Michigan, and over 2,700 verified buyers have rated us 4.9 stars. Not sure whether the Gold Bug, the DP, the Pro, or the Gold Bug 2 fits your prospecting? Tell us where you hunt and how small the gold runs, and we'll match it.
