Meshtastic Yagi Loop 3 element 869 mhz

A 3-element antenna is very effective, 9db, but narrow-band.
It is important that there is no more than 1 mm from the stripping point RG316 to the vibrator!!!
0 50-62 134
166 142x2+12x2 150
D = 2-2.4mm
Lengths (Back-to-front):
Reflector: 166mm ((166-12)/2=77)
Driven element Loop: (142mm/12mm)
Full length of wire 306mm Gap 2mm
Bending the ends in a semicircle
Director: 150mm ((150-12)/2=69)
I've redesigned the antenna RA3TOX http://rfanat.ru/s31/ant_3el-calk.html