DG7YBN - GTV 2-13m

Performance Data and Geometry

Pattern and VSWR

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Stacking

GTV 2-13m 'Aquarius' Yagi with bent Driven Element

EME and weak signal operation trimmed but OWA character Yagi ... strictly G/T breeding

This Yagi has very clean overall rear pattern for its length. It comes with lower Antenna Temperature than most Yagis at given length but provides full gain. Hence it delivers a respectable G/Ta. It is the sister design to the 432 Mhz GTV 70-13m. The bent DE (K6STI style) transforms to 50 ohms at feed point for direct feed. Design date of issue: 2024.07.17

GTV 2-13m 3D pattern plot at 144.1 MHz

Performance Data

Specs: with 8 mm elements @ 144.1 MHz


Gain vs. isotr. Rad.  15.7 dBi
Gain vs. Dipole       13.6 dBD
-3 dB E-plane         32.2 deg. 
-3 dB H-plane         34.6 deg.
F/B                  -31.7 dB
F/R                  -29.4 dB
Impedance               50 ohms
VSWR Band Width       1.09:1 *
Mechan. Length        7460 mm plus boom front- and rear offsets
Electr. Length        3.59 λ

Stacking Dist. h-pol. (144.1 MHz)
top-to-bottom         3.498 m or 11.5 ft
side-by-side          3.751 m or 12.3 ft

*) as in VE7BQH G/T table = at 145.00 MHz

How many VHF operators have been looking up this design since July 2024?

Geometry

This Yagi with 8 mm elements on a 25 x 25 mm boom with standard insulators

Ele. 8.0 mm
DE 10 mm
Boom 25 x 25 mm

"Ready to saw and drill" data for mounting elements on boom with BC according DG7YBN for standard insulators as sold by WiMo, Tino's Funkshop, HF-Kits NL, 7arrays:

Includes an SBC of 2.34 mm