Butternut HF2V Vertical antenna.

The antenna is ground mounted with 30 buried radials, but will be soon raised to 3m high, with resonant radials... time permiting.

NEC4WIN95 Antenna Design File.

CM G4EZT 2000.
CM NEC4WIN95 File
CM Butternut HF2V, 40 (7.05 MHz) and 80 (3.79 MHz). Ground mounted.
CE
GND Reference
UNITS Meters
Height 0.000
Over Ground 13 5 (Diel. - Cond. µSiemens)
Radials 30 10
Boundary Circular
F 7.050
GW 0 3 0.000 0.000 0.100 0.000 0.000 0.450 0.020
GW 1 3 0.000 0.000 0.450 0.000 0.000 0.750 0.020
GW 2 3 0.000 0.000 0.750 0.000 0.000 0.920 0.020
GW 3 3 0.000 0.000 0.920 0.000 0.000 1.170 0.020
GW 4 3 0.000 0.000 1.220 0.000 0.000 1.570 0.020
GW 5 10 0.000 0.000 1.570 0.000 0.000 6.000 0.020
GW 6 10 0.000 0.000 6.000 0.000 0.000 9.630 0.020
GW 7 3 0.000 0.000 0.750 0.000 -0.100 0.750 0.020
GW 8 3 0.000 -0.100 0.750 0.000 -0.100 1.220 0.020
GW 9 3 0.000 -0.100 1.220 0.000 0.000 1.220 0.020
GW 10 3 0.000 0.000 0.920 0.000 0.100 0.920 0.020
GW 11 3 0.000 0.100 0.920 0.000 0.100 1.220 0.020
GW 12 3 0.000 0.100 1.220 0.000 0.000 1.220 0.020
GW 13 3 0.000 0.100 0.000 0.000 0.100 0.100 0.020
GW 14 3 0.000 0.100 0.100 0.000 0.000 0.100 0.020
GW 15 3 0.000 0.000 0.000 0.000 0.000 0.100 0.020
S 1 61 100 0
LS 1 80 0 9.6 0
LS 2 39 0 0 200
LS 3 49 0 4.675 0
LS 4 13 0 4.4 0
LS 5 55 0 1 0
Coax 50

Antenna layout, showing loading sections and base matching coil/dc shunt.

7 MHz plots.

3.7 MHz plots.