[Elecraft] The Myth of Lying to Your K3

[Ed Muns]

K2AV noted:
> "The crystal filter is always wider than the DSP bandwidth 
> and therefore does not cause the IF bandwidth to be narrower 
> due to cascading."
> 
> To construe the sentence correctly requires the assumption 
> that ONLY the shape INSIDE the rated 3 dB or 6 dB passband 
> matters. It is true that this "flat" part of the curve is 
> governed most by the characteristics of the narrower curve. 
> HOWEVER, everything cascades.
> PARTICULARLY so on the skirts.

That's right.  I chose to simplify the point by not getting into the skirt
issues.  It's clear from the posts on this reflector that the basics of this
topic are not well understood, let alone the subtleties of the cascaded
skirts.

Ed - W0YK
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Ed Muns
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