My RTL-SDR V3 is being overloaded by an AM broadcast so I'd like to build a high-pass filter to block the AM broadcast band. I thought I'd start simple and try making the one shown in Fig 3 of "Dealing with AM Broadcast Band Interference to Your Receiver":
Concerning the inductors... The document talks about using T50-2 or T50-15 but I only have T37-2 and T37-6 on hand. I can use https://toroids.info to figure out how many turns I'd need on the T37s to make 3.3 uH, but is there any particular reason to choose one or the other of the T37s I have? The fact that the author of the document seems fine with T50-2 or T50-15 makes me think that the "optimum resonant circuit range" of the toroid isn't very important in this application.
Does this filter design resonate on lower frequencies, meaning it would be better to use the T37-2 which has an optimal range of 250 kHz to 10 MHz?
Thanks for any insight you can provide!