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- YBN 50-2wA 1.2 m 50 MHz 2 ele. with split Dipole for direct 50 ohms feed to be very uncritical for home building. A wideband version with hugh bandwidth.
A project for an afternoon ...
Antenna View
- YBN 50-5wrc vsA 4 m 50 MHz 5 ele. with hairpin match and split Dipole to be very uncritical for home building.
Elevation Plot
- YBN 50-5wA 4.4 m 50 MHz 5 ele. derived from the 2 m 5 ele with split Dipole to be very uncritical for home building. A wideband version with hugh bandwidth and yet high F/B.
Elevation Plot
- YBN 50-7mzcA 7.96 m 50 MHz 7 ele. with hairpin match and split Dipole to be very uncritical for home building.
Elevation Plot
- YBN 50-9mA 13 m 50 MHz 9 ele. derived from the 2 m GTV 2-9m but with split Dipole to be very uncritical for home building.
Elevation Plot
- GTV 50-3wA 1.8 m 50 MHz 3 ele. Yagi. A wideband version with much bandwidth and yet relatively high F/B for its size
Elevation Plot
- GTV 50-6mA 6.8 m 50 MHz 6 ele. Yagi with very high F/B for its size
Elevation Plot
- GTV 50-7n mk2Revision of the very directive 8.6 m 50 MHz 7 ele. with bent Driver. Carefully tuned for some bandwidth and high F/R now - all without loosing on gain.
Elevation Plot
- GTV 50-8w10.7 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 50-10LT14.6 m very low noise, high 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
- YBN 50-2w
- • 70 MHz
- • 144 MHz
- • 432 MHz
• Antennas
Performance Data and Geometry Pattern and VSWR Download as File StackingYBN 50-5wrc vs with Straight Dipole
Wideband version 50.0 - 50.7 MHz with VSWR > 1:1.1 with high F/B and
overall relatively clean rear pattern ... with a straight dipole.
This Yagi is a compact size 5 element 20 ohms native impedance Yagi that is adapted to 50 ohms using a hairpin match.
This medium length Yagi is balanced between gain and Antenna Temperature. Date of design issue: 2022.04.25.
YBN 50-5wrc vs built by Karel, OK2ZI at use on DXpedition TN8K
Current Profile
Performance Data
Gain vs. isotr. Rad. 10.36 dBi with Average Gaiun Correction = 10.35 dBi Gain vs. Dipole 8.21 dBD -3 dB E-plane 52.2 deg. -3 dB H-plane 67.6 deg. F/B -30.8 / -35.1 dB F/R -16.5 dB Impedance 50 ohms with hairpin match VSWR Band Width 1.07:1 * Mechan. Length 4070 mm incl. 2 x 60 mm offset Electr. Length 0.66 λ Stacking Dist. h-pol. top-to-bottom 5.36 m side-by-side 6.80 m *) as in VE7BQH G/T table = at 50.30 MHz
Geometry
Flight pack DXpedition taper version, no element nor boom section longer than 1.40 m:
Table 1: YBN 50-5wrc vs, 15 mm elements on a 25 x 25 mm boom:
"Ready to saw and drill" data for mounting elements on boom with standard insulators. BC according DG7YBN:
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Boom shape: square Boom dim: 25 x 25 mm |
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Note: This includes a "Segmentation Density Correction" (SBC) of 1.17 mm
This design has been viewed how often after the first built has been published in Jan. 2023?
Pattern and VSWR Plots
Current distribution Elevation and Azimuth plot at 50.15 MHz (gain is subject to AVG correction)
RL and SWR plot - simulated
Stacking
Stacking Dist. DL6WU Formula H-plane 5.373 m = 17.63 ft E-plane 6.794 m = 22.29 ft
4 bay stack at 100 percent distances according DL6WU (gain is subject to AVG correction)
73, Hartmut, DG7YBN