cobwebb antenna build..
Home brew 11 mtr & 2 mtr Quad
Create 730V-1-A V-Dipole
* Create V Type dipole with rigid radials 40-20-15-10-6m
* Bands 40, 30, 15, 10 & 6m
* Power 500W
* Full width 2:1 max Feed 50 Ohms (more details to follow)
The Create 730V1A is a 5-band DX trapped dipole covering 40 to 6m. The inverted V configuration gives it a near Omni-directional pattern. Self supporting it can be mounted (with the V pointing upwards or downwards) on any convenient mast or tower, and fed with a single coax feeder cable.
* Create V Type dipole with rigid radials 40-20-15-10-6m
* Bands 40, 30, 15, 10 & 6m
* Power 500W
* Full width 2:1 max Feed 50 Ohms (more details to follow)
The Create 730V1A is a 5-band DX trapped dipole covering 40 to 6m. The inverted V configuration gives it a near Omni-directional pattern. Self supporting it can be mounted (with the V pointing upwards or downwards) on any convenient mast or tower, and fed with a single coax feeder cable.
TH-2MK3
2 ELEMENT TRI-BAND, BEAM, 10/15/20
Covers 10, 15, and 20 Meters.
Stats:
Gain: 3.4 dBd (avg).
F/B Ratio: 15-20 dB (avg).
Max power: 1500 Watts PEP.
Boom Length: 6 feet.
Longest Element: 27.3 feet.
Turning Radius: 14.3 feet.
Mast Diameter: 1.9 - 2.5 inches OD.
Surface Area: 3.25 sq. feet.
Net weight: 20 pounds.
Wind Survival: 80 mph.
220505 Tonna 6m (50 - 51MHz) 5 el Yagi,
Effective electrical length : 0.57 l
Isotropic gain. 10.1 dBi
Aperture angle @ -3 dB
- E-plane ........... : 2 x 27.5°
- H-plane ........... : 2 x 37.5°
First side lobe set
- E-plane ........... : None
- H-plane ........... : None
Rear protection.. : - 23.8 dB
Average stray radiation
- E-plane ........... : - 30 dB
- H-plane ........... : - 18 dB
Bandwidth
Gain @ -1 dB.. 48 to 52 MHz
Nominal impedance... 50 W
Impedance match bandwidth @ SWR<1.3/1 : 49.9 to 50.5 MHz
Acceptable RF power (continous duty)...1000 W
Array of 2 or 4 antennas
(optimized stacking distance, from center to
center of elements, for minimal side lobe
radiation)
- E-plane - Electrical distance .. : 0.93 l
- E-plane - Practical distance ... : 5.58 m
- H-plane - Electrical distance .. : 0.75 l
- H-plane - Practical distance ... : 4.50 m
Mechanical data
Connector...: Bracket
Overall length....: 3.45 m
Mass.......4.9 kg
Effective wind load
- Horizontal polarisation.. : 0.13 m2
- Vertical polarisation...... : 0.35 m2
Approximate wind load (25m/s - 55 mph)
- Horizontal polarization.. : 4.9 daN
- Vertical polarization..... : 13.2 daN
Approximate wind load (45m/s - 100 mph)
- Horizontal polarization.. : 15.9 daN
- Vertical polarization..... : 42.8 daN
Effective electrical length : 0.57 l
Isotropic gain. 10.1 dBi
Aperture angle @ -3 dB
- E-plane ........... : 2 x 27.5°
- H-plane ........... : 2 x 37.5°
First side lobe set
- E-plane ........... : None
- H-plane ........... : None
Rear protection.. : - 23.8 dB
Average stray radiation
- E-plane ........... : - 30 dB
- H-plane ........... : - 18 dB
Bandwidth
Gain @ -1 dB.. 48 to 52 MHz
Nominal impedance... 50 W
Impedance match bandwidth @ SWR<1.3/1 : 49.9 to 50.5 MHz
Acceptable RF power (continous duty)...1000 W
Array of 2 or 4 antennas
(optimized stacking distance, from center to
center of elements, for minimal side lobe
radiation)
- E-plane - Electrical distance .. : 0.93 l
- E-plane - Practical distance ... : 5.58 m
- H-plane - Electrical distance .. : 0.75 l
- H-plane - Practical distance ... : 4.50 m
Mechanical data
Connector...: Bracket
Overall length....: 3.45 m
Mass.......4.9 kg
Effective wind load
- Horizontal polarisation.. : 0.13 m2
- Vertical polarisation...... : 0.35 m2
Approximate wind load (25m/s - 55 mph)
- Horizontal polarization.. : 4.9 daN
- Vertical polarization..... : 13.2 daN
Approximate wind load (45m/s - 100 mph)
- Horizontal polarization.. : 15.9 daN
- Vertical polarization..... : 42.8 daN