[Elecraft] K4 on AM

[W2xj]

There is an old rule that the product of the lowest and highest audio frequencies should be between 450,000 and 500,000 (depending on which ‘expert’ you ask).  Under that rule, a 3 KHz audio response should have a low end response of 150 Hertz for a balanced sound. 

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> On Mar 2, 2020, at 8:02 PM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
> 
> Why is it we are always prone to boost or add something?   Ever thought of taking away something?   With most EQ systems, attenuation excessive energy is much preferable to boosting anything.
> 
> So if ones audio is bassy or muddy, do we add high end or reduce low end?   Hint:  it is not adding high end.   Jim, K9YC, has written much on this topic.  If in doubt, always attenuate first.
> 
> If the glass is full of wine and one desires more wine, what's the choice?  Surely one can't add more wine or the glass will overflow.   Then the solution is to take a drink of wine, thus reduce the amount of wine in the glass.  Same for boosting in audio.  The system has a point where it is full and will overflow.   It won't get better, but it will get worse.
> 
> 73
> 
> Bob, K4TAX
> 
>> On 3/2/2020 2:10 PM, Joe Subich, W4TV wrote:
>> When a user cranks up the low frequency audio EQ on those
>> rigs and then uses high level of audio processing the
>> unfiltered (as in after the DSP/IF filter) PA chain 
> 
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