Re: #40m #TVI #DTV #U3S #WSPR Freeview Interference #u3s #wspr #40m #tvi #dtv

KEN G4APB
 

I built both BB filters to the PO design shown earlier. one in a plastic box unscreened, and one covered in copper tape to screen it. I measured both responses so I know they are built correctly. If I use UK 70.15250MHz WSPR freq it is marginally worse than the ‘standard’ 70.09250MHz freq, so i shall try a sharp notch filter when i can get one. 
73 Ken g4apb 

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