[Elecraft] k3 matching filters

Don Wilhelm w3fpr at embarqmail.com
Sun Dec 21 09:40:26 EST 2008


Stewart,

You are correct that the importance of the offset is inversely 
proportional to the filter width.  A 50 Hz shift not make much 
difference with the 2.7 or 2.8 kHz width, but it certainly will make a 
big difference at a 200 Hz width.

73,
Don W3FPR

GW0ETF wrote:
> I didn't bother about paying/asking for matched default filters for my KRX3.
> The one in the main board has a -0.93kHz offset and the one in the KRX3 is
> -0.83kHz.
>
> Shifting them both to -0.88kHz seems to make no difference to performance -
> would you expect a 50Hz shift in a nominal -6dB b/w of ~2.7kHz to be that
> noticable anyway?
>
> However the wondering 'beat' between right and left channels disappears
> completely when you doctor the offsets - just need a nice big Beverage
> now.....
>
> 73,
>
> Stewart Rolfe, GW0ETF 
>   
>


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