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VHF/UHF Dualband vertical


I used this antenna aluminum 0f 10mm diameter, or yoy use a brass rod of about 7 mm diameter. the top one is a strong copper bras wire of 5 to 7 mm diameter
post 09 May 2024
VHF/UHF Dualband vertical

Antenna for UHF VHF Links

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Lindenblad Antenna for 137MHz
I have built my last couple of Lindenblads from lengths of 4mm-diameter galvanised steel fencing wire, some standard 300-ohm television ribbon cable

Quad 2 elementi 144 Mhz
Realizzare il boom tagliando il listello di legno più grosso per una lunghezza di circa 23 cm,quindi fissare gli angolari due per lato contrapposti con le viti per legno

Quadrifilaire 137 Mhz for satellite
I found that an excellent antenna for picking up these signals are Quadrifilar Helix Antennas 137 MHz

Quadra Cubica de 4 Elementos para VHF


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