"Engineering is *always* about compromises. -- Ron AC7AC"
While I certainly agree in theory, I don't think I'm making many with the
K3. I picked my roofing filters on the basis of contesting and
non-contesting.
For non-contesting there's very little that strains the DSP. For general
puttering
On Sat, 12 Jul 2008 06:13:31 -0400, DOUGLAS ZWIEBEL wrote:
>Roofing filters work to help knock out IMD (intermod) which may be
>encountered when multiple, very strong signals (stronger than Mike's
>59+10) populate the band.
YES! It's important to remember that the add-in filters are ROOFING
fi
> Using a 2.8 XFIL and DSP to make it 1.8 KHz, I found SSB
> signals to be a bit "tinny" and hard sounding.
What were the LO CUT and HI CUT values that produced this "tinny and hard
sounding" audio?
In both my K3s, the audio sounds great and it sounds identical, whether I
use the 2.8 or the 1.8
One aspect that Doug leaves out, however is that of audio quality.
Signals will sound different with different filtering.
Using a 2.8 XFIL and DSP to make it 1.8 KHz, I found SSB signals to be
a bit "tinny" and hard sounding.
I installed a 1.8 KHz XFIL, and found the audio quality to be
improved
Doug, KR2Q, presented a superb explanation of why one needn't sweat too much
over the "roofing" (first I.F.) filter in the K3.
I'm enough of an O.T. to remember the famous 1950's articles in QST "What's
Wrong With Our Present Receivers?" by Byron Goodman, W1DX, who pointed out
the astonishing id
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