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Look on schematic diagramm MFJ duplexer


Look on schematic diagramm MFJ duplexer

For connect TX antenna and RX converter i suppose that RX converter has 145 IF Im use old MFJ-916 duplexer with 144/440 label

post 29 Sep 2024


Antenna Duplex duplexer Links

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Duplexer 144-432 MHz
Questo duplexer autocostruibile in pochi minuti , permette di operare con due antenne 144-435 separate con un rtx bibanda, facilita le operazione per il traffico satellite

Duplexer per la banda 144/430 MHz
Lo stadio VHF e' un filtro di Chebishev Passa Basso a 5 elementi con un'attenuazione di circa 50dB/ottava al di fuori della banda passante

Duplexers">Duplexers frequencies such as VHF - UHF
Duplexers really do an amazing job. They allow a transmitter and receiver that are very close in frequency to operate into the same antenna

Diplexer Low cost per 145 / 435 MHz
Collegare un'antenna bibanda 145/435 MHz

Diplexer Low cost per 145 / 435 MHz
Born from the need to connect a 145/435 MHz bib antenna with the radio equipment


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