@HopelessDemigod Biggest antenna I've ever used was a 5/8 vertical on 160 metres. I used a 5 foot diameter balloon and 100 yds of aluminium fence wire. I had to run two fishing-line guys to keep the balloon roughly vertical and tied it to the top of a 40 ft mast, insulated at the base and fed with a tapped loading coil. It was amazing, but a total nightmare. Condensation made the balloon and wire very heavy. The water detuned the antenna a lot. It needed a mechanical twanger to shift the drips