Description

The Nokta C28 is an 11-inch round search coil designed exclusively for the CF77 Coin Finder, delivering deeper detection on coin-sized targets while maintaining tight target separation in iron-heavy sites. CF77 owners hunting old homesteads, school grounds, and trashy parks reach for the C28 when the stock coil isn’t punching through moderate trash layers or hitting the depth they need on older coins. The 11-inch diameter sits between smaller maneuverable coils and larger depth-focused coils, giving you noticeably better coverage per sweep without sacrificing the control required to isolate individual targets around obstacles.

What’s Included with the Nokta C28 Coil

• Nokta C28 11″ round search coil with wired connection for CF77 Coin Finder

Why CF77 Coin Finder Owners Reach for the C28

• Medium-sized advantage balances depth performance with target separation, punching deeper than smaller coils while still isolating targets in trashy areas where larger search heads struggle
• Confined-space productivity lets you work around obstacles in old homestead sites and school grounds without the swing radius challenges that 15-inch or 17-inch coils introduce
• Versatile target detection covers coins, jewelry, relics, and small gold nuggets with improved sensitivity over the stock configuration shipped with base CF77 units
• Round configuration delivers consistent depth across the entire sweep
• When you need a larger coil for wide-open fields, the Nokta C45 17.5″ coil offers maximum depth and ground coverage for beach hunting and large search zones

Deeper Coin Recovery in Iron-Heavy Parks and School Grounds

Old Homestead Sites with Moderate Trash Layers

The C28’s 11-inch footprint provides greater detection volume than smaller coils, pushing silver coins and seated coinage into range at sites where the stock coil leaves targets behind. The round geometry maintains consistent depth across your swing, so edge-of-sweep targets don’t vanish when you change your angle. We’ve used this coil on 1800s farmstead sites where iron nails and square nails litter the ground, and the C28 isolates coin signals between the trash without the masking that larger coils introduce.

Trashy Park Hunting Where Target Separation Matters

School grounds and tot lots demand tight target separation, and the C28 delivers it without sacrificing the depth you need to reach coins below the pull-tab and bottle-cap layer. The 11-inch size lets you work around playground equipment and benches where a 15-inch or 17-inch coil forces awkward angles. Run your CF77’s discrimination settings to notch out iron, and the C28 will separate silver dimes from adjacent trash targets that a larger coil would blend into a single signal.

Beach Hunting in Wet Sand and Surf Zones

The C28’s waterproof construction handles wet sand and shallow water, and the medium size balances ground coverage with sensitivity to small gold and silver targets. Beach hunters working the slope between dry sand and surf need a coil that punches through mineralized sand without overwhelming the detector with ground noise, and the 11-inch round configuration does that while still covering enough ground per sweep to make a morning hunt productive. For wide-open beach zones where maximum depth matters most, step up to the C45 17.5-inch coil, but the C28 is the better choice when you’re working around rocks or driftwood.

How it compares to other CF77 coils

The table below compares the C28 against the larger C45 coil and protective covers available for Nokta metal detectors.

Feature	Nokta C28 11″ Coil	C45 17.5″ Coil
Compatibility	Nokta CF77 Coin Finder only	Nokta CF77 Coin Finder only
Coil Size	11 inches	17.5 inches
Shape	Round	Round
Best For	Trashy sites, confined spaces, balanced depth and separation	Open fields, beaches, maximum depth and ground coverage
Waterproof	Yes	Not specified

Specifications

• Compatibility: Nokta CF77 Coin Finder only
• Coil Size: 11 inches
• Shape: Round
• Configuration: Open build, wired connection
• Waterproof: Yes
• Target Types: Coins, jewelry, relics, small gold nuggets

Why Buy from Serious Detecting

We are an authorized Nokta dealer, which means every C28 coil ships with the full manufacturer warranty and our team’s direct support. Our staff runs Nokta equipment in the field, so we understand the real-world performance differences between metal detector search coils: DD, concentric, monoloop & SEF upgrades and can guide your coil selection based on your hunting sites. Free shipping, 30-day returns, and our price-match guarantee back every order. When you need to understand metal detector technologies or compare coil configurations for your specific detecting scenarios, our team answers those questions from direct experience.