My name is Hayden Sims VK4NU.

I’m currently living in Brisbane, Australia. I moved here in 2020 and had a temporary Amateur license with call-sign VK4AAF until it expired in 2021 at which time I gained my full VK callsign which is now VK4NU. I sill retain my New Zealand call-sign ZL2WD.

This page will show my activities in Australia on Amateur Radio and events in my state and throughout Australia.

Grid Square – QG62NM

ITU Zone – 55

CQ Zone – 30

IOTA – OC-001

You can follow me on:-


Twitter – @vk4nu

Email –

Below is some of  the gear I use. This is all in portable use as I can not have any antennas at my QTH.

I use a 12ah Lithium battery with these radios and I also have a back up 100ah Lithium Battery in my car if required.


Icom IC-7300