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Re: low-band filter

jdow
 

https://ka7oei.blogspot.com/2018/02/managing-hf-signal-dynamics-on-rtl-sdr.html

That has some interesting observations and well down the page some interesting schematics.

It appears he revisited the filter a couple more times if you dig a little.

{^_^}

On 20201112 18:01:07, doug wrote:

I wonder if there is available from some source a simple filter that would attenuate the broadcast band
to a sufficient extent as to not create harmonics or overload the input of simple sdr devices, or the tinySA
spectrum analyzer. I am interested in tracking down the source of some broad-band noise in the lower
frequency range from about 3 to 15 MHz.
--doug, WA2SAY





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