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Well I think what you have is interesting. My interest is in your knowledge of how to scan radio frequencies . Do you know anything about how this might be made to work on other frequencies ,433Mhz , 200Mhz or 20Mhz for instance?
What particular parts would need to be changed and what other matters might be considered? (obviously the receiver, but could a simple receiver be made or bought )
It might have uses in scanning for bugs , and spectrum analysis.
You put in a lot of work to do this and I thank you for posting it.