A set with infinity Hausdorff measure, but Hausdorff dimension $\frac{\log2}{\log3}$

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I am going through the text 'Fractal Geometry: Mathematical Foundations and Applications' and came the following exercise:

Give a set $B\subset\mathbb{R}$ that has Hausdorff dimension $s=\frac{\log2}{\log3}$ but has $H^s(B)=\infty$.

My thoughts:

Now, when I see $\frac{\log2}{\log3}$ the first thing that comes to mind is the cantor set $C$, but the $H^s(C)$ is finite. I feel as though I am missing a lemma or theorem. Is there some relation of the Hausdorff dimension of a set constructed by countable unions?