My K3 with the new synth (and upgraded DSP board) has an unfortunate "birdy" on 50.276 (unfortunate because this is the JT65 calling frequency in the US). I know it is a DSP-type artifact because the pitch of the birdy changes with the IF Shift control. The IF shift control does not change the frequency of the signal, just the birdy. This phenomenon is actually useful. By shifting the center frequency to 1.35 kHz I can move the spur down to zero beat. And, like all spurs, the pitch of the spur changes a lot faster than the tuning rate of the radio. The pitch of the spur also varies with the setting of the crystal filter offset (mine is set at 200 Hz).
----- 73 Ken -- View this message in context: http://elecraft.365791.n2.nabble.com/6m-birdies-and-K3S-and-or-new-synth-boards-tp7604211p7604287.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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]
