Hits 

Antenna 144 MHz 25 Ohm Stacked Yagi


Antenna 144 MHz 25 Ohm Stacked Yagi

The array works excellent with a very good antenna pattern.The measured SWR of the complete group in the common feeding point is 1,1 beween 144,0 and 144,8 MHz

post 26 Sep 2024


Antenna for UHF VHF Links

149



Helical Antenna,
Antenn helix for 2400 MHz, swr 1,2 2400 - 2440 MHZ

Hentenna 144 Mhz
Rientra nella categoria delle loop e' stata inventata e sviluppata attorno agli anni 1970 da un gruppo di tre radioamatori giapponesi JE1DEU-JH1FCZ-JH1YST

Hentenna 2mt
Sono due loop adiacenti con l'alimentazione al centro, la sua polarizzazione sia orizzontale che verticale

La birdgage o G4ZU
Sostanzialmente una evoluzione della cubicalquad. I due telai quadrati costituiti dal radiatore e il riflettore, vengono piegati a 90 gradi


23cm Yagi Antenna building

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

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

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