molgrips… sorry, but do you understand this? If so, where does this notch come from? Certainly not from an RC network!
Just for reference, the 1/RC frequency is in radians per second, you’ll need to add a 2*pi in there somewhere to get a result in Hz! Also, this frequency is called the cutoff frequency, breakpoint, or 3db point.
One other thing, the larger the R and C, the lower the cutoff frerquency…
Spongebob… it still is all snake oil and mumbo-jumbo, you’ve just been sucked in!