Antenna adapter, mode FT8 reception tests

Today I wanted to adapt my antenna, a 20m rotary dipole to the 40m frequency used for receiving FT8 digital signals (You see here). I used a home made antenna adapter -The adapter consists of a coil with ferrite inside, a 12 position switch and a variable capacitor for further adjustments (more info here) - and with the help of the NanoVNA, acting on the variable capacitor, I obtained fantastic reception results on 40 meters.

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