[sdiy] PCB Transformers

[cheater cheater]

On Thu, Jan 19, 2023 at 1:13 PM Roman Sowa <modular at go2.pl> wrote:
>
> My first reaction was "what an idiotic crazy idea with no purpose". But
> then again, since we get internal layers for free (JLC making 8-layer
> PCB for $2 now) it's no brainer to leave one or two layers for the
> heater

Has anyone ever tried putting transformers in pcb layers? I guess it
wouldn't be audio frequencies (due to size), but it might still be
fun. How about: Audio -> RF -> tiny transformer -> RF -> Audio?