Notch Filter on 40m QRG?

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Joined: 2010/09/27 - 02:44
Notch Filter on 40m QRG?

Hi friends,
is it reasonable, for receiving and sending in WSPR, to put in the the notch filter on 40m Band QRG, to minimize the strong cw beacons on 7038 khz? Or does it not interfere with WSPR, when notch filter is off?
2.Question: Is there better receiving at night to put in RF Att ( 10, 20 or 30 dB) for better results,or leave RF Att open (0 dB)?
Thanks for answering. A newcomer on WSPR.

DL4MCA, Ray, Munich