[Elecraft] K3 - Diversity Reception, Matched Roofing Filters

[Barry N1EU]

Gary Smith wrote:
> 
> I am wondering how I, without all those varieties of test gear can 
> determine if indeed there is a significant offset that exists with 
> the 8 pole filters in my K3 and if it exists to know how much it + or 
> - it is. 
> 
Feed the K3's audio into your pc's sound card and run a spectrum analysis
program.  Check for symmetry in the passband response around your sidetone
frequency (cw filters).  Observe while varying the offset.  A small amount
of asymmetry is no problem but it shouldn't be noticeably skewed to one
side. (set K3 dsp width=filter width)

73,
Barry N1EU

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