Fine observations when you change the filter setting knob, but what makes you think you are hearing the effect of the roofing filter and not the dsp filter?
David G3UNA > > From: "hank k8dd" <[EMAIL PROTECTED]> > Date: 2008/07/08 Tue PM 02:29:08 BST > To: "Jan Erik Holm" <[EMAIL PROTECTED]> > CC: [email protected] > Subject: Re: [Elecraft] Hearing the effect of narrower roofing filter > > ----- Original Message ----- > From: "Jan Erik Holm" <[EMAIL PROTECTED]> > Cc: <[email protected]> > Sent: Tuesday, July 08, 2008 8:31 AM > Subject: Re: [Elecraft] Hearing the effect of narrower roofing filter > > > > Darwin, Keith wrote: > >> each step. When I step to 500 Hz and the narrow roofing filter kicks > >> in, I can hear a distinct change, more than just the DSP narrowing I'd > >> heard while stepping from 1000 Hz to 550 Hz. The effect is very > >> noticeable. > >> > >> - Keith N1AS - > >> - K3 711 - > > Keith, > > > > Can you describe this "change" closer. > > > > 73 Jim SM2EKM > > Get two pieces of plastic pipe about a foot long. > One six inches in diameter. > One three inche in diameter. > Close one eye and look at the mountains in the horizon and you will see a > wide view. 6000 Hz > Put the six inch pipe up to the other eye. You will see a portion of the > horizon - like 1000 Hz. > Put the three inch pipe up to your eye. 500 Hz. > The effect, as Keith says, is very noticeable! > > 73 Hank K8DD > > ____________________________________________________________ > GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at > http://www.inbox.com/smileys > Works with AIM®, MSN® Messenger, Yahoo!® Messenger, ICQ®, Google TalkT and > most webmails > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ----------------------------------------- Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
