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La antena de cuadro o Magnetic Loop
The first antenna of this type that I made, was something similar to a frame antenna similar to those used by the old AM radios figure-1 left. With several turns of thin enameled copper wire and a variable capacitor between its terminals, about 300 pF
post 04 Jul 2024
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Antennas for the New Beacon Design
The new 3496 class-E high efficiency Beacon design
Bandpass receiving loops for 136kHz and 500kHz
I designed receiving loop antennas with a bandpass characteristic to cover the whole 136kHz band without the need for remote tuning
Broadband magnetic active antenna
I have built a broadband magnetic receiving antenna. The hardware is ready in a first expansion state
Build a simple magnetic loop antenna
For the main loop I used a soft copper tube, diameter is 10 mm, length about 3 meter. The smaller loop is about 60 cm in length diameter 1/5 of the main loop, material is 1,5 square mm copperwire
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The new 3496 class-E high efficiency Beacon design
I designed receiving loop antennas with a bandpass characteristic to cover the whole 136kHz band without the need for remote tuning
I have built a broadband magnetic receiving antenna. The hardware is ready in a first expansion state
For the main loop I used a soft copper tube, diameter is 10 mm, length about 3 meter. The smaller loop is about 60 cm in length diameter 1/5 of the main loop, material is 1,5 square mm copperwire
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
Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione