--- In
> Any conventional "Notch" filter can give you in excess of 20dB of
rejection at 5 Meg separation with minimal loss at your Rx frequency.
In essence all notch filters are really a band pass-band reject filter
with careful calculation.
I get 40dB with a coax stub, but I don't remember the bandwidth offhand.
There's a way to calculate them so that they end up a pass at your
desired freq (broad) and a notch at the undesired one (narrower), but I
don't have a pointer to a URL at the moment.
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