[Elecraft] K2 Alignment

[Don Wilhelm]

----- Original Message -----

... As to Sideband, I've not a clue. There's no "tone" to tweak towards, and
it all sounds like Mickey Mouse anyhow.

--------------------------------------
Dan,

Setting SSB with Spectogram is relatively easy

Just set the BFO so that the filter passband is wherever you want it in the
audio spectrum (the frequencies at the bottom of the Spectogram display).

First select the filter width that you want to work with - somewhere between
1500 Hz and 2300 Hz is about right.  If you have the OP1 filter (SSB adapter
filter) you do not set its width, just set the BFOs - and that setting
should be fined tuned for your voice on transmit.  Mine worked FB with the
settings suggested in the SSB adapter manual.  The normal variable bandwidth
filter has a lot of passband ripple at the wider settings, and I found that
due to that ripple, I actually had to set the width to 1200 to give me a
passband that was closer to 1600 Hz wide.  After setting the filter width,
proceed to set the BFO - you adjust the passband position to correspond with
the audio range you want to hear rather than 'centering' the signal in the
passband (or you can think of it as actually centering the whole range of
audio frequencies as a band if you prefer - say 300 to 2300 Hz)

You likely want about 300 Hz to be the lower frequency of the passband for
best intelligibility - so set a Spectogram marker at 300 Hz and adjust the
BFO until the rising (left) edge of the displayed passband crosses that
marker.  You actually want to place the marker somewhere on the slope of the
passband.  I would suggest at about 6 dB down from the peak of the passband.
Then take a look at the high frequncy end and see how the audio matches with
your selected filter width - if it is not right, adjust the width.

73,
Don Wilhelm  - Wake Forest, NC   W3FPR home page: http://www.qsl.net/w3fpr/
  QRP-L # 485   K2  SN 0020   mailto: w3fpr@arrl.net