[Elecraft] APF

[Brian Hunt]

My "formula" for tuning very weak signals - almost can't see them on the P3 - is as follows:

- Set the WIDTH to 700 Hz to 1 KHz QRM permitting. 

- Turn on NR and set to 5m3 or there about. 

- Turn on APF and tune for best audio. Setting the rate to FINE sometimes helps. 

This almost completely eliminates noise ringing the filter although the signal does ring a little. YMMV. 

73,
Brian, K0DTJ