[Elecraft] The Myth of Lying to Your K3

[Guy Olinger K2AV]

I'm not sure the flat passband is the better pick if you have to pick
one. One narrows the passband to NOT hear things, or no one would ever
buy anything but the wide body roofer.  The FT1000MP would do.

The rejection of signals before the analog to digital converter, the
vertical range of the converter, and defensive hardware AGC in front
of the converter are central concepts of the radio.  Might as well
take them head on.

73, Guy.

On Sun, Mar 14, 2010 at 12:34 AM, Ed Muns <w0yk at msn.com> wrote:
> 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
> -----------------------------------------------
> Ed Muns
> Muns Vineyard - www.munsvineyard.com
> FaceBook - www.facebook.com/munsvineyard
>
>