Ham Radio Antenna

Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m

Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m
Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m
Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m
Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m
Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m

Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m

Worldwide unique design : High-efficiency 49:1 transformer + RF choke in the same package. 1,5KW SSB / 400W FT8. From 80 up to 10m. ==> Get the best and unique worldwide combo & legal limit EFHW + RF choke!!!!!!!!!! Efficiency measured > 85% from 80 up to 10m (160m usable at reduced power).

Closewound windings + autotransformer (14/2 turns ratio). Genuine 3x FT240-52 from Fair-rite + 6Kv capacitors from TDK ==> unique design on the market!

Toroid stack protected by double-layer of fiberglass tape for better heat protection. Output on ceramic insulator + M6 stainless steel A4-grade screw. High-end 1,8mm enameled copper wire, double-coated, 210°c and > 10Kv insulation (spec IEC 60317-13).

Genuine 2xFT240 toroid from Fair-Rite. RG142 double shielded coaxial cable. Covers from 160 up to 10m with > 33dB of common mode rejection, with Rs>Xs and losses. SO239 for 50 Ohm input. Counterpoise connection = stainless steel A4-grade (316 inox).

Stainless steel A4-grade eyebolt for free suspension. 2x vent valves included, to avoid condensation and cool down the core.

Made in France, by a ham, for hams!


Unique combo 491 EFHW transformer + RF choke 1.5KW SSB / 400W FT8 80-10m