Using Kraken for 30 - 100 MHz

Hi I am new to this community! I am waiting for my Kraken to be shipped for me. Out of curiosity has anyone tried using the Kraken for frequencies under 100MHz? I understand that the array radius must be larger but that should not be a problem for me since I can install them on my roof. What antennas have you used?

Thank you.

Here you will find an Antenna Size Calculators. Antenna Size Calculator

It will work for frequencies under 100 MHz without issue, but unless you have a massive roof, you’re going to start getting into trouble near the lower end of the range.