[Elecraft] [K3] APF and Pitch

2013-05-12 Thread Pierfrancesco Caci
Someone mentioned that APF rings less when pitch tone is set to 440 Hz instead of 800 Hz. So, I'm trying and it indeed seems to ring less. Anyone else hearing this? Is this some DSP effect or a psychoacustic effect? Condition of test: 200Hz 5-pole filter DSP BW 50Hz RF gain backed so that

Re: [Elecraft] [K3] APF and Pitch

2013-05-12 Thread Ken G Kopp
I operate almost exclusively CW and my APF is never turned off. I use a 400 Hz filter, BW set at @350 Hz, and a pitch setting of 440 Hz. FWIW, I hear -no- ringing. 73! Ken - K0PP On Sun, May 12, 2013 at 8:25 AM, Pierfrancesco Caci p...@tippete.net wrote: Someone mentioned that APF rings

Re: [Elecraft] [K3] APF and Pitch

2013-05-12 Thread Ron D'Eau Claire
lower frequency tones too.) 73 Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Pierfrancesco Caci Sent: Sunday, May 12, 2013 1:25 AM To: elecraft@mailman.qth.net Subject: [Elecraft] [K3] APF and Pitch Someone

Re: [Elecraft] [K3] APF and Pitch

2013-05-12 Thread Pierfrancesco Caci
Ron -Original Message- Ron From: elecraft-boun...@mailman.qth.net Ron [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Pierfrancesco Caci Ron Sent: Sunday, May 12, 2013 1:25 AM Ron To: elecraft@mailman.qth.net Ron Subject: [Elecraft] [K3] APF and Pitch Ron

Re: [Elecraft] [K3] APF and Pitch

2013-05-12 Thread Ron D'Eau Claire
...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Pierfrancesco Caci Sent: Sunday, May 12, 2013 9:19 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] APF and Pitch thanks Ron, I guess this relates to Q=f/deltaf ? Didn't even think of this, and it's interesting

Re: [Elecraft] [K3] APF and Pitch

2013-05-12 Thread Mike Greenway
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

[Elecraft] [K3] APF and Pitch

2013-05-12 Thread Chuck Guenther
K3 users may wish to try my Macro's for using APF (CW Audio Peak Filter): APF ON Turns on APF, puts VFO in Fine tune mode (1 Hz resolution): IS ;SWH29;RT1;SWT53;RT0;RT1;SWT49;LK0; APF DN Turns on APF, puts VFO in Fine, turns on RIT and tunes down 20 Hz: IS