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HF-VHF Diplexer


HF-VHF Diplexer

One band I've been wanting to activate is 6 Meters, my first challenge was I didn't want to use a coax switch to flip between HF and VHF

post 29 Sep 2024


Antenna Duplex duplexer Links

50



Duplexer 144-432 MHz
This self-constructing duplexer can be operated in just a few minutes with two 144/435 antennas

4-way Splitter/Combiner
Power splitters are used to combine 2 or more antennas on 1 feedline

HF VHF receiver diplexer
The design is relatively easy, a back to back low pass-high pass filer system with a 50 ohm impedance throughout

Stacking with homemade Power Splitters
The basis of the power splitters-combiners is a construction of a square tube for the outer conductor and a round tube for the inner conductor

Triplexer HF/50 Mhz 144 432 Mhz
To get signals from all directions, without having to constantly rotate the directional antennas

Duplexer 144 - 430 MHz
Low-pass filter 144 MHz and a high-pass filter 430 MHz of higher order


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