[Elecraft] Spectrogram

[Mike Harris]

Hi,

> When doing CAL FIL (and before tuning in an alignment signal - i.e.,
use
> background noise), use Spectrogram to center all CW filters (CWN and
CWR)
> at the pitch you have your sidetone set to.  Setting a marker in
> Spectrogram at this audio frequency will help you to visually center
the
> passbands.

Initially I used background noise when I adjusted my K2 filters.  Since
then I have used a noise generator cobbled up on a bit of perf board
which resulted in a much better display.  A nice big S9+ noise lets you
see further down the slope of the filter, especially when checking out
the crystal filter grounding mods.

Turn OFF the AGC on the K2.

Regards,

Mike VP8NO
#1400