I added two wires to my 80/160m-Inverted-L. One Lambda/4 for 30m and one Lambda/4 for 40m.
The middle wire (Inverted-L) is fed by a match-box. The quarter wave wires left and right are grounded at the bottom end. Spreaders with 3 holes keep the wires at a distance of 55mm.
The
4-Band-Antenna I match to 50 Ohm by an
Antenna-Tuner inside the gray box at
the feed point
of the
antenna:
The Antenna-Tuner contains 5 coils and 3 capacitors switched by 10 relays
Power supply and Remote Control for Antenna-Tuner is next to the transceiver in the shack
The Antenna-Tuner contains 5 coils and 3 capacitors switched by 10 relays
Power supply and Remote Control for Antenna-Tuner is next to the transceiver in the shack