Fisher F75 Review: Still a Relic Machine, Now With a Dated Interface

Because of three features that suit iron-heavy ground specifically. The first is the magnetic mineralisation bar graph and readout, which tells you how hard your soil is working against you rather than leaving you to guess why a site feels shallow. Mineralised red clay and iron-rich old ground absorb signal, and knowing that is what stops you blaming the machine.

The second is trigger-actuated FastGrab ground balance, which lets you rebalance on the spot as soil changes across a field rather than stopping to walk a menu. The third is the double-filter discrimination modes, which exist for ground so full of iron that a normal filter cannot keep up. Add trigger-actuated pinpointing with variable audio pitch and a machine Fisher describes as the lightest in the industry, and you have a tool designed for long days on difficult ground. The relic hunting roundup explains why those qualities matter more on old sites than raw depth does, and the ground balance guide covers the technique the trigger makes quick.

Fisher publishes very little tabulated specification for this model, which is itself informative at this price. Gaps below are gaps in the listing.

The F75 wins the battery column comfortably and loses the frequency and water columns, which is the shape of this whole decision.

The F75 is a fine detector whose interface and feature set now feel a generation behind the machines sitting next to it on the shelf. There is no simultaneous multi-frequency, so salt beaches are closed and mixed-ground versatility is limited. There is no wireless audio, so you are on a cable. There is no rechargeable battery, though the 40 hour figure from four AA cells means you will care less about that than you expect. The screen is a large LCD from an earlier design language, and next to a modern display it reads as functional rather than informative.

Then the money. At $419.00 you are within reach of Nokta The Legend Pro Pack at $659.00, which publishes two simultaneous multi-frequency profiles plus 4, 10, 15, 20 and 40 kHz single frequencies and ships both an 11 inch and a 6 inch DD coil. You are also above Minelab X-Terra Elite at $387.09, which publishes Multi-IQ in a fully waterproof body. Judged as a general-purpose machine in the current market, the F75 is beaten on paper by both. Judged as a dedicated relic machine for dry, mineralised, iron-filled ground, it still earns its place, and that is the narrow case in which to buy it.

Third, there is a cheaper way into the same engineering. Teknetics G2+ at $299.00 publishes an 11 inch DD coil, Ground Grab computerised ground balancing, V-Break tone breakpoints and FeTone adjustable iron audio, from the same family of designs, at a considerable saving. If the F75 appeals because of how it handles iron rather than because of the badge, look there first and read the G2+ target ID chart.

Speed is the theme that recurs most in published owner reviews. Owners describe the F75 as fast in the sense that matters on old sites: it recovers between targets quickly enough to hear a good signal squeezed between two nails, which is precisely what relic ground demands. The light build also comes up constantly, usually from people who have moved to it after shoulder or elbow trouble on heavier machines.

The consistent complaints are equally clear. Owners report chatter and falsing at high sensitivity, particularly in electrically noisy places, and treat learning where to set gain as part of owning the machine. They report the machine as unforgiving for beginners, because it gives you the raw information and expects you to interpret it. And they report the absence of modern conveniences, wireless most of all. Target numbers on this machine move with mineralisation like any other, which is why the F75 target ID chart gives ranges and tells you to build a test garden rather than trust a printed table.

Buy it if:

• You hunt dry, mineralised, iron-heavy relic ground and know it.
• You want a mineralisation readout and trigger ground balance rather than automation.
• Weight is your limiting factor and you want one of the lightest machines published.
• You value very long battery life from cells you can buy anywhere.

Skip it if:

• You hunt salt beaches or wade. This machine publishes neither multi-frequency nor submersion.
• This is your first machine, because it expects an operator who can interpret it.
• You want wireless audio or a rechargeable battery as standard.
• You want the most capability per dollar, where the Legend answers better.