I use 350 hz pitch and with a decent signal the APF works okay although its not really needed under those conditions. When the signal is very very weak it is hard for me to tell when the stations stops sending, ie the ring from noise burst sounds the same as the station transmitting. For that reason it is very annoying. I have spent time on 160 trying to copy something with APF that I cant without but cant find where it really helps. It does sound neat when you turn it on and peak up signals and maybe if there were no noise burst at all it might be more useful. I use dual QF-1A audio filters for stereo while has more control for me being able to control each ear separately. 73 Mike K4PI ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net
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