VHF Antenna Project – 160 MHz Coaxial Dipole

Yesterday I received an inquiry on how to construct a VHF Coaxial Dipole antenna (known is some circles as the Flowerpot Antenna) for a non-commercial, community two-way radio project operating at 160 MHz. How to work out the antenna dimensions for 160 MHz? Assumption: We know the wavelengths for 144 MHz and 160 MHz, 2.03m…

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Antenna Project – Recycle an old aluminium VHF TV antenna and build a hand-held 2m yagi for 144.2 MHz

This 2m yagi antenna is light on the back-pocket and relatively easy to construct. This project starts with an old VHF TV antenna purchased from a local ‘Green’ recycle depot for $5.00 AUD. The repurposed TV antenna was a Phased Array comprised of two aluminium booms and four elements or eight 1/4 wave elements. Each…

Yaesu FT-890 – returns to the bench from retirement

My FT-890 is once again on the shack bench for more distinguished service. 3 years ago I foolishly boxed the radio for an early retirement, well it’s now back in service. I have to say the ‘warm’ audio quality on receive is better than my IC-7300 and the combined IF Notch & IF Shift deals…

RF Trap Resonant Frequency

I am constructing a lightweight 40/30/20/17/15m trap style inverted V dipole antenna for SOTA purposes. Can you use an antenna analyser to check the resonant frequency of a HF trap? Yes you can, here is a practical solution. The purpose of this post is to demonstrate how you can use a modern antenna analyser to…