Filter question

[Don Rasmussen]

>> I'm a little confused as to what the KBPF3 is
really providing.

Bill - the stock K3 band pass filters will greatly
attenuate signals that are more than 1 megacycle from
a ham band. The KBPF3 will resolve that problem.

Still, the only roofing filter that comes with the
stock K3 is the 2.7 khz filter so that's what you
would be hearing through in the stock setup.

So you would need the AM 5.0 filter for better
fidelity.

Ultimately, the 15 khz FM filter would be the best
choice for roofing AM and FM (on receive).


[Elecraft] Filter question
Bill Kimura bill.kimura at gmail.com
Mon Feb 18 16:44:34 EST 2008


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[drewko]

On Mon, 18 Feb 2008 15:18:45 -0800 (PST), you wrote:

>
>Ultimately, the 15 khz FM filter would be the best
>choice for roofing AM and FM (on receive).
>
>

I have ordered the FM filter for use in AM BC reception. But now I am
reconsidering since someone has said that AM BC sounds so good with
one sideband through the 6 khz filter. I wonder if the performance
benefits of the narrower filter will outweigh the better fidelity of
the wide filter. Oh, well, still have a couple of months to decide...

73,
Drew
AF2Z

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[Dave Martin-2]

There'll be times that we'll want to listen to AM on only one sideband
or the other to get rid of interference on the other side, but no
matter how good it may sound that way, I still want the synchronous
detector and DSP wide enough to benefit from the 12 KHz filter when
conditions allow.  I enjoyed that on my 746Pro too much to be happy
with narrow AM broadcast.  I'd sure hate to go back to an Icom just to
have better AM receive.  So I'm waiting to see what the good guys can
do.

Dave  W5DHM

>
> I have ordered the FM filter for use in AM BC reception. But now I am
> reconsidering since someone has said that AM BC sounds so good with
> one sideband through the 6 khz filter. I wonder if the performance
> benefits of the narrower filter will outweigh the better fidelity of
> the wide filter. Oh, well, still have a couple of months to decide...
>
> 73,
> Drew
> AF2Z
>

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