10m-15m-20m Tribander Yagi
10m/15m/ 20m home mode 7 element tribander HF Super-compact yagi antenna. 20m band 2 el, 15m band 2 el. 10m band 3 elements. Very high gain, wideband operation antenna, low SWR, excellent F/B. Excellent mechanical properties. Direct 50 Ohm feed. input power limited by feed line only.
|Band||10m / 15m / 20m|
|Gain(dbi)||13,1 / 12,0/ 11,5|
|SWR; 14,0 – 14,20 – 14,35
21,0 – 21,25 – 21,45
28,0 – 28,40 – 29,00
|1,3 – 1,0 – 1,4|
|1,6 – 1,0 – 1,5|
|1,2 – 1,1 – 1,6|
|Number of Elements||7|
|Active Elements||10m:3 EL / 15m: 2 EL / 20m:2 EL|
ASSEMBLED SIZE (1 WING)
ALUMINUM CUTING LENGTHS (+25cm addet)
1 PCS ANTENNA CUTTING LENGTHS
20m SWR; Bandwidth 398 Khz. ( <1.5 )
15m SWR; Bandwidth 333Khz ( < 1.5)
10m SWR; Bandwidth 1283 Khz ( < 1.5)
L-Bracket; (13cm length)
U Bolt Clamp (for the elements 47mm. and the Tower mounting pipe 54 or 60mm)
Hydraulic Pipe Clamps; ( good material for the construction of the antenna).
Driver Elements insulator; (Hart plastic)
According to the internal diameter of the pipe will be made. Pipes should be 25 cm. internal node spacing of 2.5 cm.
Pipe insertion method;
it should be noted in the screwing method. Aluminum pipes are drilled according to proper opening of the element chrome bolt hole opened up, but to go through the head of a screw on the top side of the aluminum supplied complete and tightly tightening. Otherwise it is not possible to make a complete and powerful compression. you need to use washers under the screw and relaxation for chromium to prevent corrosion.
Driving element montage; (Lama 6X30cm)
Phase Line; 102cm X 2 piece, (2cm x 2cm)
Coax Cable Connection; This antenna is not required to use balun. You can use the 1:1 choke balun (ugly balun) fort the Perfect pattern.
Pole Mounting Bracket.; Main connection apparatus. Especially chrome-plated material should be used..
Normally, no adjustment is required. However, due to enviromental differences the “Point of Minimum SWR” may shift. If low SWR values ocur in the low part of the band, elements have to be shortened or vice versa. All Antennas assembled in accordance to the dimensions given in the article proved to be performing perfectly and displaying SWR of 1:1 in all bands.
few pictures from the antenna
CQ WW DX Contest 2013 10m. ” World 6.”
“If you are making this antenna, please also send one photo”
This antenna has been designed by myself. I have to note that I’m not an engineer. I’ll be very happy if this project will be fulfilling the expectations of fellow Hams. This Project or any other Project of mine can be shared-as long as not being used for commercial purposes.
i wish all builders success.
73! TA7OM, Huda.