The 409 is zero. Are the passband centered on display?
Sent from my iPhone ...nr4c. bill > On Feb 18, 2017, at 3:30 AM, Dave AD6A <[email protected]> wrote: > > Hi Folks, > > > > I'm having a go at my first CW contest for many years (and boy, am I > rusty!!). > > I've worked several new countries already, BUT, I noticed my K3s main and > sub receivers' 400Hz and 200Hz CW filter offsets are all quite a bit off > (even though I put the offsets in that were written on the filters), causing > me to tune the stations in at a lower than optimal tone (in order to hear > them properly) and trying to put in an XIT offset so they can hear me in > their tight RX passband. So far, it's not working that well. At a rough > guess, I'd say they were about 200 to 300Hz low of where I need them to be > (600Hz tone is my chosen optimal listening frequency). > > > > So, my question is, is there a simple way to accurately determine what the > frequency offset of each filter is without having to open the rig up and > dive in with test equipment? > > > > I'm guessing it could be something like: > > a. Tune in a strong-ish CW station or carrier to exactly 600Hz audio > (use the tone mon to compare with the 600Hz reference audibly) > b. Note the VFO frequency (on FINE) > c. Use the RIT function to tune the station/carrier in to the peak of > the crystal filter > d. Note the offset > e. Apply the offset to the crystal filter bank > > > > What do you think of this procedure? > > Got a better/quicker one? > > Any/all input most gratefully accepted. > > > > Cheers es 73, > > Dave AD6A > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
