[Elecraft] Elecraft K2 filters?

[Mike K8CN]

Gavin,
The K2 uses a single voltage-variable capacitance (varicap) diode-tuned
crystal filter on the main RF board, and the filter bandwidths are
programmable by the user within a moderate range.  A separate fixed
bandwidth crystal filter is present on the KSB2 SSB option board if
installed.  A "no additional equipment" procedure for adjusting the variable
bandwidth filter is described in the K2 manual, but most operators use a
computer-based spectrum analysis tool (e.g. Spectrogram) to visualize the
filter passband while the tuning adjustment is being made.  Check out Don,
W3FPR's web page (http://w3fpr.com/) for a link to the free versions of
Spectrogram and tips on adjusting the K2 filter settings for different modes
and desired bandwidths.  

73,
Mike, K8CN



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