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Diplex VHF UHF Separation of two bands

Diplex VHF UHF Separation of two bands
    Here is a small assembly achievable in a short time and which allows to couple a VHF and UHF device on a dual-band antenna 144/432 via a single coaxial
post 06 May 2025



Antenna Duplex duplexer Links →

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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

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


Ferrite-shop

Ferrite Shop Ferrite-shop on-line shop, cable clamps,toroids, cable cores, technic,ferrite material choice

Kits and Components

Amateur radio kits by Kanga US

Pcs Electronics

Pcs Electronics RF power amplifiers-pallets archives-ABC of FM AM DAB+ DRM radio transmitters

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Arduino CW Keyer

Arduino CW Keyer Questo progetto, dal nome yaacwk, sta per Yet Another Arduino CW Keyer

The Folded Dipole

The Folded Dipole The Folded Dipole is not used much amongst Radio amateurs, probably due to the fact that this antenna uses twice as much wire as a single-wire dipole

Rf Directional Power Meter

Rf Directional Power Meter A wide dynamic range power meter using a directional coupler, AD8307 Log Amplifier and arduino microcontroller

Wireless cw iambic memory keyer

Wireless cw iambic memory keyer- Cross country wireless cw iambic memory keyer

The Vocal Keyer

The Vocal Keyer The vocal keyer for Yaesu FT1000 MarkV

Helix 2.425 GHz band

Helix 2.425 GHz band Broad bandwidth in the 2.425GHz band>

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

Bazooka Antenna Calculator

Bazooka Antenna Calculator Programma caculator for bazooka antenna,with measurements already calculated for frequeze used by radio amateurs

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