On the low end of the filter it drops down from around 600Hz over most of the range to around 500Hz. I am sure others can detail why.
David, K3ZTUE . --- Roger Marrotte <[EMAIL PROTECTED]> wrote: > I just finished building KX1 #1447. All went well with the construction. > All seems to be working fine. This is the second KX1 I've built. I've also > built three K2s and a K1, all with most options. I recently built another > company's QRP rig and that was a chore, to say the least, compared with > building the Elecraft rigs. The center frequency for the crystal filter on > the new KX1 seems to be around 490Hz according to Spectrogram. Peaking > signals with the filter set to it's narrowest setting shows a center > frequency of about 490Hz with Spectrogram. I built my first KX1 when they > first came out and I have since sold it and I don't remember what the center > frequency was for that one. Is this low? Is this normal? Should it be > closer to 600Hz? Can it be adjusted up closer to 600Hz? All else works > fine with the radio. The filter is nice and sharp. Signals are strong on > both bands. The rig only has 20 and 40 meters so far. I did the BFO and > DDS procedures. Signals seem to be coming in at the right frequencies. > > Roger, W1EM > _______________________________________________ > 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 > _______________________________________________ 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
