[Elecraft] K3 transmit and receive audio response

[Barry N1EU]

The low end response of the stock K3 is limited by coupling capacitor
impedance in the audio stage.

73,
Barry N1EU



Lyle Johnson wrote:
> 
>> What I would like to know is just what the ACTUAL response curves of 
>> the K3 transmit and receive audio are (when all EQ settings are set to 
>> '0',
> 
> Flat means the EQ does not add or subtract to the filter response dialed 
> in by the operator with the SHIFT/WIDTH/HIGH CUT/LOW CUT controls.  The 
> high end and low end response will be dictated by those settings,  This 
> will be modified by the impedances in the path from the radio to the 
> headphones or speaker and the impedance of the headphones or speaker, or 
> the characteristics of the transformers and the overall impedances in 
> the LINE OUT case.
> 
> Finally, the edges of the selected passband will be rolled off by the 
> action of the FIR filter windowing function applied to the filter 
> coefficients.
> 
> 73,
> 
> Lyle KK7P
> 
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