Performance Data and Geometry
Pattern and VSWR
Download as File
GTV 50-8w Yagi with bent Driven Element
Wide-band version ... a "unconditionally stable" yet high G/T Yagi that shows least
degradation with wet elements or snow on and thus easy to reproduce parameters.
If you are looking for a Yagi suitable for worst weather condx ... this one might be it.
This medium length Yagi is anchored around 50.2 MHz to produce guaranted G/T at a moderate
T_ant from 50.0 to 50.5 MHz. The bent DE (K6STI style) transforms from low impedance to 50 ohms
at feed point for direct feed.
The wet weather stability or vice versa tolerance according slightly wrong BC numbers or element diameters
of this design will be among the best according to what Владимир UR5EAZ figured out for the 144 MHz
version of this 7 ele. GTV.
Elem. 5/8 in + 16 mm Gain vs. isotr. Rad. 13.4 dBi Gain vs. Dipole 11.2 dBD -3 dB E-plane 40.8 deg. -3 dB H-plane 46.6 deg. F/B -28.0 dB F/R -22.5 dB Impedance 50 ohms VSWR Band Width 1.22:1 * Mechan. Length 10620 mm Electr. Length 1.78 λ Stacking Dist. h-pol. top-to-bottom 7.56 m = 24.79 ft side-by-side 8.58 m = 28.13 ft *) as in VE7BQH G/T table = at 50.50 MHz
Element and Driver diameter is 5/8 inch or 16 mm throughout Use EZNEC's Auto-Segmentation at 135 MHz.
Pattern and VSWR Plots
Elevation and Azimuth plot at 50.15 MHz
RL and SWR plot - simulated / 50.0 - 51.0 MHz
Gain, F/B and F/R plot - simulated / 50.0 - 51.0 MHz
EZNEC file of this Yagi
STACKING info will follow shortly
73, Hartmut, DG7YBN