I agree. And even if this worked out it would only give significant attenuation for signals around the medium wave AM broadcast bands. For anything else it's just going to be few dB. But how else do we avoid NF degradation when sharing simple BPFs for the high bands? Any transmit-only WSPR guys might not mind poor Rx NF. So for them a 7-band Tx might still be good fun.? But those wanting 7-band Rx might not be so happy.
