For: Super Bowl CB / DXING 11 meter band
Antenna Type: 5el YAGI OWA
Feedsystem: 50 Ohms direct fed
Designed by: 19DX348
Updated version (1998) -1.01 feb 2025
Boom length: 5,92 Meter
Gain: 9,72 dBI (@27,555 Mhz)
FB <30 dB (H field)
FR <22 dB (H field)
Impedance: 50 ohms, direct fed
SWR below 1:1.1 > 1100 Khz.
SWR below 2:1 > 2000 Khz
Above the freespace azimuth plot at 27,555 MHz
Above the freespace elevation plot at 27,555 MHz
Above the SWR plot for 50 Ohms direct fed.
Above the gain / front to back / front to rear response versus frequency.
ELEMENTS DIAMETER ARE: 3/4 inch and 1/2 inch diameter.
The center part of the element is 1,8288 meter long. And the 1/2 inch for the rest of the element lenght. (this is what Maco uses)
Do not change diameters, if you need other dimensions,
Or if you need to shift this Yagi in frequency, please feel free to ask
ELEMENT: DISTANCE LENGHT:
REFLECTOR 0 5,679
RADIATOR 1,010 5,556
DIRECTOR 1 1.412 5,254
DIRECTOR 2 3.320 5,139
DIRECTOR 3 5,920 4,910
The impedance of the antenna is 50 Ohms and direct feed can be applied.
It is a must to always use A RF choke or 1;1 balun.