VHF Antenna for Cobra Radios
The direct answer: any marine VHF antenna works with a Cobra radio — antennas are universal. Fixed-mount VHF radios all use the same standard 50-ohm connection (SO-239 socket, PL-259 plug). What actually decides your range and how long the antenna lasts: construction, gain, cable and connector quality.
Cobra fixed-mount radios are budget-friendly workhorses; upgrading the antenna is the single biggest range improvement most Cobra installs can make.
What actually matters when pairing an antenna with your Cobra
- Connector. Your Cobra (MR F45, MR F57, MR F77) has an SO-239 socket. Every Scout antenna ships with the matching PL-259 — and the QuickFit line removes the soldering step entirely.
- Gain, matched to your hull. 3 dB holds the horizon on boats that roll; 6 dB reaches farther from stable platforms. The gain guide explains the trade in two minutes.
- Construction. The radio is only as good as the antenna: Scout builds every model 100% foam filled with solid brass/copper elements and AISI 316 stainless hardware — and in nearly two years of US sales has had zero warranty claims.
- Cable run. Quality cable ships in every Scout box; keep the run short and solder-free where possible. The installation guide covers routing.
Scout picks for Cobra owners
- Scout KS-41 — 4 ft / 3 dB: small boats, T-tops, and anywhere windage matters. QuickFit solderless option.
- Scout KS-42 — 8 ft / 6 dB: the classic center-console and cruiser pairing, 25–30 mile range.
- Scout KS-43 — 8 ft / 6 dB collinear-phased: the best-performing antenna in the range.
- Sailboat? See the full range for masthead 3 dB antennas.
Undecided? The antenna selector matches antenna to boat in four questions.
Where to buy Scout antennas
Scout antennas are sold through authorized dealers and distributors. Email us and you'll get a personal reply from the US importer — dealer options for your area, straight answers, usually same day.
Common questions
What VHF antenna works with a Cobra radio?
Any marine VHF antenna. Fixed-mount VHF radios — Cobra included — use the industry-standard 50-ohm antenna connection with an SO-239 socket that accepts a PL-259 connector. There is no such thing as a "Cobra antenna"; what matters is antenna quality: construction, gain, cable and connector.
Does Cobra make its own VHF antenna?
Cobra sells radios; the antenna is a separate purchase from an antenna maker. That is good news — it means you can pair a Cobra radio (MR F45, MR F57, MR F77) with the best antenna for your boat rather than a bundled compromise.
What gain should I choose for a Cobra radio?
Gain comes from the antenna, not the radio. The honest rule: 3 dB (usually 4–5 ft) for small boats, sailboats and anything that rolls — it holds the horizon as the boat moves; 6 dB (usually 8 ft) for stable powerboats that want maximum range. Radio brand plays no part in that choice.
Other radio brands: Garmin · Raymarine · Standard Horizon · Icom · Simrad · Lowrance · B&G · Furuno · Uniden