Hits
Antenna Quad 144 MHz
6 elementi con l'adattatore di impedenza serve per trasformare l'impedenza bilanciata del radiatore di circa 200 Ohm in una sbilanciata da 50 Ohm
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
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
Interface-for-digital-broadcasts-with-integrated-audio 4-port HUB, with a TUSB2046. With port 1 of the HUB we drive the FT232RL; with port 2 the PCM2904, furthermore, we decided to leave ports 3 and 4 free