-
• Main Page
- • Home
• Antennas - • 144 MHz
- Straight Dipole
144 MHz YagisYBN 2-9m: 4.5 m moderate band width, low Antenna Temperature, good willing 50 ohms direct feed Yagi - a straight DE version twin to the GTV 2-9m
Elevation Plot
- GTV 2-2mA 50 ohms direct feed 2 ele. Yagi with bent DE and potential as broad beam Contest Stack.
It can be used as back-to-back stack:
- GTV 2-4w1.0 m 144-146 MHz wide band width version of the Low Noise Yagi with bent DE as useful for satellite operation as for contesting thanks to high F/B and small volume of rear quadrants lobs in general.
Elevation Plot at 144.1 MHz
- GTV 2-5m1.6 m moderate to wide band width version of the Low Noise Yagi with bent DE as useful for satellite operation as for contesting thanks to high F/B and small volume of rear quadrants lobs in general.
Elevation Plot
- GTV 2-6m2.4 m moderate band width version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-7w2.7 m wide band width version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-7n3.1 m narrow band, max. G/T version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-8w3.7 m wide-band, still good G/T and nice F/B version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-8n3.8 m narrow band, max. G/T version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-9n4.3 m narrow band, balanced between low Antenna Temp. and G/T version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-9m4.5 m moderate band width, low Antenna Temp. version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-10LT5.1 m moderate band width, lowest Antenna Temp. version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-11LT6.0 m moderate band width, lowest Antenna Temp. version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-12m mk2Improved 6.8 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot:
- GTV 2-12n6.8 m narrow band version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot:
- GTV 2-13m7.5 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot:
- GTV 2-14w8.4 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-16w10 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-18w11.7 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-19m12.4 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- Straight Dipole
Performance Data and Geometry Pattern and VSWR Download as File StackingGTV 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
The Drivers diameter is 10 mm for all examples.
The EZNEC model is done with Auto-Segmentation at 380 MHz
Sketch of Bent Dipole
-->
Pattern and VSWR Plots
Elevation and Azimuth plot at 144.1 MHz
RL and SWR plots - simulated
Gain and F/B, F/R
Downloads
None so far.
Stacking
4 x GTV 2-13m in H-configuration at 100 percent of DL6WU stacking distances
Elevation and Azimuth plot at 144.1 MHz
G/Ta analysis with the Excel version of AGTC lite
for the 4 bay stacked per DL6WU formula:
73, Hartmut, DG7YBN