Mine does that too. The VCO for a frequency around 14.360 MHz should be running aabout 19.274 MHz and the reference oscillator runs at about 12.096 MHz. 2*19.274-2*12.096 = 14.356 MHz, so that seems to be the culprit. It pops in because of the way the VCO is tuned. When you get to the edge of the fine tuning, the U4 tunes the VCO to the next 5KHz coarse step and U5 changes the reference oscillator back to the beginning of a fine step. For the previous coarse step the birdie is not heard, but for this coarse step the two oscillators are tuned so that it is. On my K2, with the way I have RTTY set up, I can hear it pop in on RTTY at 14361.5 and then it pops out at the next coarse step at 14366.5
73 Kevin w9cf Brian Mury-3 wrote: > > On Wed, 2008-10-15 at 19:34 -0600, Michael Lewis wrote: >> band. I actually tuned out of 20m by a little bit up to 14359 >> (14359.03 on the display to be exact) and BAM! I got an S9 tone. It >> goes from totally quiet to S9 as soon as the tuning display hits >> 14359.03. happens with no external antenna. > > I just tried it and I get the same thing. Starts at exactly: > > 14359.03 USB (I assume you were using USB?) > 14360.80 CW > 14359.25 CW reverse > 14361.74 LSB > 14361.50 RTTY > 14358.53 RTTY reverse > > It behaves exactly as you described. It always starts suddenly then > gradually tapers off in strength while tuning to higher frequencies. > > > > _______________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/Strange-K2-Behavior--tp1339332p1344229.html Sent from the Elecraft mailing list archive at Nabble.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
