Hits 

Antenna helix 432-435-Mhz


Antenna helix 432-435-Mhz
Building a 14 turn home-made helical antenna for 432/435mhz
post 05 Jul 2024


Helix Antennas Links

34



2m-70cm-quadrifilar-helical-antenna
Build a pair of QHAs, one for 2 meter and one for 70 cm. A diplexer is of course needed to connect both to the single antenna connector of a dualband radio

2.4Ghz Helix antenna
Antenna especially for frequencies in the range 2 - 5 GHz this design is very easy, practical, and, non critical

2400 MHz Helix Antenna
This antenna is easy to build and suitable for broadband work, satellite work and terrestrial work


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