Characteristics of HP-IL Transformers?

[rprosperi]

(09-16-2020 04:06 PM)J-F Garnier Wrote:  Et voilà, now I have a transformer-coupled PIL-Box :-)

Thanks JF!

Can you please explain the virtues of transformer coupling for us non-EE's in the audience? Put another way, why/how is this better (I presume you wouldn't bother to make this and announce it if it wasn't better) than a standard PIL-Box?