Hits
Antenna Yagi a 6 elementi per i 2 metri
Il boom e' lungo 1,75 m sezione 1,8 x 1,8 cm, il riflettore 50,3 cm, il radiatore 48,9 cm, d1 44,9cm, d2 44,3 cm, d3 40,8 cm, d4 39,5cm
post 01 Feb 2024
Antenna for UHF VHF Links →
2m Antennen Preamplifier Vorverstaerker
With a gas-fet CF300, and switchable gain between 14 and 24 dBD, noise figure better than 0.9dB, continuity damping better than 0.2 dB, transmittable power 750 W PEP to 2 meters with these prinelais
2 Meter & 70 Centimeter Mobile Halo
2 m 70 cm dual band antenna, horizontally polarized antenna, with aluminum rod for the radiant element and also copper tube
2m Band VHF Antenna Pre-Ampilfier
I have an old VHF transceiver a little-bit "deaf"! By adding the following VHF pre-amp as 1st stage, the improving of sensitivity is spectacular
2m. Band VHF Collinear with 2 Dipoles
After the dipoles and coaxial cables placement into the mast, its time for the final tuning
2m. Band VHF Dipole with Gamma match system
Collinear antenna project, wich gives a gain of about 5,1 DBi with 2 dipoles and 8,1 DBi with 4 dipoles Omni directional
155
With a gas-fet CF300, and switchable gain between 14 and 24 dBD, noise figure better than 0.9dB, continuity damping better than 0.2 dB, transmittable power 750 W PEP to 2 meters with these prinelais
2 m 70 cm dual band antenna, horizontally polarized antenna, with aluminum rod for the radiant element and also copper tube
I have an old VHF transceiver a little-bit "deaf"! By adding the following VHF pre-amp as 1st stage, the improving of sensitivity is spectacular
After the dipoles and coaxial cables placement into the mast, its time for the final tuning
Collinear antenna project, wich gives a gain of about 5,1 DBi with 2 dipoles and 8,1 DBi with 4 dipoles Omni directional
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Calculo da Antena Bazooka A double bazooka antenna is a combination that has a complete coaxial wave multiplied by its velocity factor and a total end-to-end length of 1/4 wave for each side affected by another driver shortening facto