[Elecraft] Err TXF

[Bill W4ZV]

G4ILO wrote:
> 
> 
> 
> Bill W4ZV wrote:
>> 
>> I seriously doubt it since the 5-pole has been measured at >2.9 kHz (6 dB
>> BW).  It's easy enough to check without unnecessary speculation.  
>> 
> Unnecessary speculation? Unnecessary as far as you are concerned, perhaps,
> but not for me. The figures quoted in the Wiki weren't obtained by
> measuring *my* filter. And I don't have the equipment to easily check it.
> What else might the "2.39KHz" mean?
> 

Who knows?  It could mean someone's dyslexic and wrote 2.39 instead of 2.93. 
It would take me less time to check it than I've spent writing emails about
it!  All you need is a steady signal source like the XG1 since there's a
meter internal to the K3 with 0.1 dB resolution.  Just remember to set WIDTH
to maximum (which takes the DSP filter out of the equation), set the
internal meter to 0.0 dBV in the filter center, and note the frequency
difference for both -6.0 dBV points.

73,  Bill



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