[Elecraft] Strange K2 Behavior?

[w9cf]

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.
> 
> 
> 
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