40 Meter Wire Antennas

40 Meter CW

Center Frequency:   7.025 Mhz  20.73 Mhz 3rd Harmonic
Halfwave in space is:  70.04 feet 47.62 coax|57.43 twinlead
Quarterwave in space is: 35.02 feet 23.81 coax|28.71 twinlead

Quarterwave Vertical is: 33.31 feet 39.22 foot ground radials
Five Eights wave Vertical is: 85.84 feet 33.31 foot ground plane
Three Quarter wave Vertical: 103.35 feet 16.65 foot eighthwave

Halfwave Dipole/Vertical is: 66.62 feet 33.31 one side.
Halfwave Reflector is:  69.95 feet 63.62 for Director
Low Mount Halfwave is:  65.20 feet 32.60 one side.
Halfwave Folded Dipole is: 65.77 feet 32.88 one side.
Halfwave Inverted V is:  69.04 feet 34.52 one side.
Colinear Array is:  136.65 feet 68.33 one side.
Extended Double Zepp is: 171.67 feet 85.84 one side.

Fullwave Quad Loop is:  145.20 feet 36.30 one side.
Reflector|Director:  152.46|138.66 38.11|34.67 one side.
Fullwave Delta Loop is:  145.20 feet 48.40 one side.
Reflector|Director:  152.46|138.66 50.82|46.22 one side.

Waves 1: 136.65 |1.5: 206.69 |2: 276.73 |2.5: 346.76 |3: 416.80 |4 : 556.87
Waves 5: 696.94 |6.0: 837.01 |7: 977.08 |8.0:1117.15 |9:1257.22 |10:1397.30

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40 Meter NOVICE / 41 Meter SWL AM Band

Center Frequency:   7.130 Mhz  21.04 Mhz 3rd Harmonic
Halfwave in space is:  69.00 feet 46.92 coax|56.58 twinlead
Quarterwave in space is: 34.50 feet 23.46 coax|28.29 twinlead

Quarterwave Vertical is: 32.82 feet 38.64 foot ground radials
Five Eights wave Vertical is: 84.57 feet 32.82 foot ground plane
Three Quarter wave Vertical: 101.82 feet 16.41 foot eighthwave

Halfwave Dipole/Vertical is: 65.64 feet 32.82 one side.
Halfwave Reflector is:  68.92 feet 62.68 for Director
Low Mount Halfwave is:  64.24 feet 32.12 one side.
Halfwave Folded Dipole is: 64.80 feet 32.40 one side.
Halfwave Inverted V is:  68.02 feet 34.01 one side.
Colinear Array is:  134.64 feet 67.32 one side.
Extended Double Zepp is: 169.14 feet 84.57 one side.

Fullwave Quad Loop is:  143.06 feet 35.76 one side.
Reflector|Director:  150.21|136.62 37.55|34.15 one side.
Fullwave Delta Loop is:  143.06 feet 47.69 one side.
Reflector|Director:  150.21|136.62 50.07|45.54 one side.

Waves 1: 134.64 |1.5: 203.65 |2: 272.65 |2.5: 341.65 |3: 410.66 |4 : 548.67
Waves 5: 686.68 |6.0: 824.68 |7: 962.69 |8.0:1100.70 |9:1238.71 |10:1376.72

Note: As any novice knows, the 40 meter novice band has always been shared with international SW broadcast. Dodging AM heterodynes is what 40 meter Novice Operation is all about. The Russians have always had a special love for 41 meter AM broadcasting.

40 Meter SSB

Center Frequency:   7.225 Mhz  21.32 Mhz 3rd Harmonic
Halfwave in space is:  68.10 feet 46.31 coax|55.84 twinlead
Quarterwave in space is: 34.05 feet 23.15 coax|27.92 twinlead

Quarterwave Vertical is: 32.39 feet 38.13 foot ground radials
Five Eights wave Vertical is: 83.46 feet 32.39 foot ground plane
Three Quarter wave Vertical: 100.48 feet 16.19 foot eighthwave

Halfwave Dipole/Vertical is: 64.78 feet 32.39 one side.
Halfwave Reflector is:  68.01 feet 61.86 for Director
Low Mount Halfwave is:  63.39 feet 31.70 one side.
Halfwave Folded Dipole is: 63.94 feet 31.97 one side.
Halfwave Inverted V is:  67.13 feet 33.56 one side.
Colinear Array is:  132.87 feet 66.44 one side.
Extended Double Zepp is: 166.92 feet 83.46 one side.

Fullwave Quad Loop is:  141.18 feet 35.29 one side.
Reflector|Director:  148.24|134.82 37.06|33.71 one side.
Fullwave Delta Loop is:  141.18 feet 47.06 one side.
Reflector|Director:  148.24|134.82 49.41|44.94 one side.

Waves 1: 132.87 |1.5: 200.97 |2: 269.07 |2.5: 337.16 |3: 405.26 |4 : 541.45
Waves 5: 677.65 |6.0: 813.84 |7: 950.03 |8.0:1086.23 |9:1222.42 |10:1358.62