[Elecraft] DSP and IF Filters

[Merv Schweigert]

Cannot say what Rons definition of the noise is,  but mine is the higher 
pitched sound
of the radio without QRN and a noise level of S1 to S2 on the meter,  
but I find its
easy to find a comfortable listening "pitch" by just using the shift  
and a couple clicks
down the passband and the high pitch is gone.  For instance the FC* on 
mine says
.60  and if I move the shift down to .50 or .40 the high pitch is gone. 
Have never found a setting on NR that has worked for me,  others have 
better luck.
73 Merv KH7C
> A precise definition of what you mean by "atmospheric noise"?  And were you 
> talking about effectively "rolling off" higher frequencies or were you 
> talking about cancellation?
>
> One definition of "atmospheric noise includes both close and distant 
> lightning static or QRN, including from another continent.
>
> In all my years I have never seen a verified reduction of signal-to-noise 
> from QRN that didn't amount to reducing bandwidth, which still works no 
> better now than it did in 1955.
>
> Careful work with levels and SNR always exposes the truth from "sounds 
> better".  Sounding more "pleasant" does not mean you will communicate better 
> in a contest. You'll just feel better doing the same thing.
>
> Not that I haven't been listening and hoping all that time.  PLEASE, PLEASE 
> don't prove me wrong!
>
> 73, Guy.
>
> ----- Original Message ----- 
> From: "Ron Edmon" <ronedmon at gotsky.com>
> To: <elecraft at mailman.qth.net>
> Sent: Friday, June 19, 2009 10:40 PM
> Subject: [Elecraft] DSP and IF Filters
>
>
>   
>> I have been going through the manual on the K3 trying different combination
>> of DSP and IF as well as NR filters trying to reduce atmospheric noise.  I
>> find the noise level to high pitched which fatigues me after an hour or so
>> of listening.  I've listened to the "Hear It" external DSP filter employed
>> on a friends ten-tec rig and the reduction of atmospheric noise is
>> significant (1 "S" unit or better).  Shouldn't the K3 DSP filter be 
>> capable
>> of reducing the atmospheric noise to acceptable levels?
>>
>> Ron, N6SC
>>
>>
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>
>
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