How to Calibrate Your Falcon MD20 Metal Detector

Serious Detecting
2022-08-17T00:01:33-04:00

Your Falcon MD20 Metal Detector needs regular calibration checks to maintain peak performance in the field. This pinpointer-style detector is particularly sensitive to calibration drift, especially when you're hunting for small gold nuggets or working in mineralized soil.

Quick Calibration Check for Falcon MD20

The Falcon MD20 includes a built-in test ring system that makes calibration checks straightforward. Here's the exact process:

1. Turn the Auto Gnd Bal knob fully to the left (fully counter-clockwise)

2. Set the copper ring on the BLACK line

3. Turn the MD20 on with the sensitivity switch (fully to the left but on)

4. Slide the copper ring toward the RED line

The MD20 should sound as the copper ring crosses the RED line. If it sounds off within a 1/16 inch either side of the RED line, it's within calibration limits.

What to Do If Your Falcon MD20 is Out of Calibration

If the detector doesn't respond at the red line or triggers too early, you'll need to contact Falcon for recalibration service. Unlike some gold metal detectors that offer user-adjustable calibration, the MD20 requires factory service for major calibration adjustments.

Minor drift can sometimes be compensated by adjusting your ground balance technique, but significant calibration issues need professional attention.

When to Check Falcon MD20 Calibration

Check your calibration monthly if you're a regular user, or before important detecting trips. Temperature changes, shipping, and general use can affect the internal components.

You should also check calibration if you notice:

Decreased sensitivity to small targets

False signals in clean ground

Inconsistent depth readings

Poor ground balance performance

Maximizing Your Falcon Gold Tracker MD20 Performance

Beyond calibration, keep your MD20 performing at its best with proper metal detector accessories. A quality headphone upgrade can help you hear subtle target signals, especially when working in noisy environments.

The MD20 works well alongside larger metal detectors as a pinpointing tool, or as a primary detector for tight spaces and crevice hunting.

Ground Balance Tips for the MD20

Even with proper calibration, ground balancing technique matters. Start with the Auto Gnd Bal control at minimum, then slowly increase until the detector runs quietly over mineralized ground. Don't over-balance – you'll lose sensitivity to small gold pieces.

For serious gold hunting, consider pairing your MD20 with other specialized metal detector parts and accessories like sample bags and classification tools.