DD search coil · Minelab X-Terra, two-frequency 7.5 and 18.75 kHzMax Depth

NEL Big for Minelab X-Terra (all models) · 7.5, 18.75 kHz

Name: NEL Big for Minelab X-Terra (all models) (7.5, 18.75 kHz)
Brand: NEL
SKU: NELBG260

Article: NELBG260EAN: 4820165741954

Detection depth10/10

Separation of iron from non-ferrous metals (silver, bronze, gold, copper)6/10

Sensitivity to small targets7/10

Sensitivity to large targets10/10

Size: 15" × 17"38 × 43 cm
Weight: 32.8 oz930 g
Coil type: DD7.5, 18.75 kHz
Waterproof: 100%

NEL Big 15 x 17 inch DD search coil on a metal detector stem

Overview

Built for searching at maximum depth. In independent tests by detectorists on specialist forums and at events, NEL Big ranks among the deepest metal detector coils available.

An exclusive NEL product: this is the two-frequency version, with switchable frequencies of 7.5 kHz and 18.75 kHz. Switching the frequency lets you set up the metal detector for different search conditions: 7.5 kHz as an all-round setting, and the high 18.75 kHz frequency for small targets.

It responds very well to large targets, as well as small ones — from 1 g — at more than 25 cm. Use it on open fields as an additional coil for deep searching.

+30–60% depth+50–80% ground coveragevs. stock coil (depending on the metal detector model)

Compatible Minelab metal detectors

X-Terra 30
X-Terra 34
X-Terra 305
X-Terra 50
X-Terra 54
X-Terra 505
X-Terra 70
X-Terra 74
X-Terra 705

Important for Minelab X-Terra

How do I set the ground balance?

Use automatic ground balance. On X-Terra 50, 54, 505, 30, 34 and 305 you can also use manual ground balance. If the detector will not balance, reduce the sensitivity by 50%.

Which Noise Cancel setting should I use?

Set it to 0 by default.
For the longest reach on a large copper coin in air, set it to +1. This may cause false signals from the ground.
To minimise the response to hot rocks or heavily mineralised ground, set it to −1 or −2. Change the value until the detector stops reacting to such ground.

What sensitivity should I set with a large NEL coil?

Start at the starting value and raise it by one every 0.5–1 hour of detecting until you are used to the coil.

X-Terra series	Starting value	Sites with interference (e.g. grass)	Sites without interference (e.g. ploughed field)
70, 74, 705	19	25–27	27–30
50, 54, 505	14	17–18	19–20
30, 34, 305	6	7–8	9–10

How do I switch the frequency?

Switch the detector off and on again within 2 seconds: the coil moves to the next frequency. If more than 2 seconds pass between off and on, the frequency stays the same, as the coil remembers the last frequency selected.

All FAQ and Tips →

Where it works best: Open fields and large areas where maximum depth matters. It reaches deep-lying hoards, large objects and coins that are out of reach for the coil supplied with the metal detector. Works best as an additional coil: go over a "hunted-out" field again and recover what lies deeper.
Recommended for: Experienced detectorists.

Features

The coil is fully waterproof and submersible. The body is filled with epoxy resin and finished with a black marine-grade coating, the kind used on yachts and boats, so it can be used without a plastic coil cover. It handles medium and high ground mineralization well.

Cable strain relief
Protects the cable from kinking and also provides complete waterproofing.
Robust mounting bracket
Holds the coil firmly on the stem.
Outer shell
Made of impact-resistant, UV-resistant plastic.
Coil cover
Protects the search coil from damage and chipping.
Wear-resistant coating
Made of composite materials, so the coil can safely be used without a cover if required.
Rubber rings
For a firmer fit of the coil on the lower stem.
Connector
Gold- or silver-plated contacts.
High-strength cable
With a larger conductor cross-section. Made in Germany.
Protective cap
Protects the connector from dirt and dust.
Fixing bolt and hook-and-loop strap
Supplied with the coil.