A very stable antenna, which can handle hugh powers.
Relative unharmed by weather or other influences.
Very forgiving for first time antenna builders !
A true working horse !
Above the freespace azimuth plot.
Above the freespace elevation plot
Above the elevation plot when the antenna is situated at 18 meters above average ground.
Above the SWR plot.
Above: Gain versus frequency
Above: front to rear versus frequency
Above: front to back versus frequency
For: DX portion and CB Channels 11 meter band
Antenna Type: 5el OWA
Designed by: Version 1.01 Nov 1998 (19DX348)
Boom length: 5,91 Meter
Gain: 9,65 dBI (@27,555 Mhz)
FB >29 dB
FR >24 dB
Impedance: 50 ohms, direct fed
SWR 1:1.1 > 1600 KHz.
SWR 2:1 > 1900 KHz
ELEMENT DIMENSIONS:
All elements are made out of 5/8 inch and 1/2 inch aluminium tubing.
The center piece of 5/8 inch is 3 meters long. At the end 1/2 tubing needs to be inserted, to make up for the full element length….
(DO NOT CHANGE DIAMETERS OR LENGTH)
ELEMENT LENGTH:
Reflector: 5,582 M
Radiator: 5,570 M
Director 1: 5,240 M
Director 2: 5,110 M
Director 3: 4,830 M
ELEMENT DISTANCES:
Reflector to radiator = 1,21 M
Reflector to director 1= 1,48 M
Reflector to director 2= 3,16 M
Reflector to director 3= 5,91 M
FEEDING THE ANTENNA:
The antenna is 50 ohms.
The radiator needs to be isolated from the boom. The radiator
Can be split in half and be “direct” fed.
A 1:1 balun and/or a RF choke is adviced for all Yagi’s.
If you need any futher information, please feel free to ask.
Kind regards,
Henry
NOT FOR COMMERCIAL USE.