[Elecraft] Elecraft technology >> K2+

[Don Allen]

Jim Brown wrote:

>On Mon, 29 Dec 2003 11:59:49 -0500, Floyd Sense wrote:
>
>  
>
>>My question is: does the KDSP2 auto-notch function degrade voice readability
>>or does it function more like the MFJ?
>>    
>>

I've owned some of the better DSP audio filters including the Timewave 
599zx, JPS NIR-10, and dual-DSP JPS NIR-12.  All have fast acting and 
deep auto-notch functions.  However, the best auto-notch functions I've 
ever used are analog, and available in the Datong (Dr. David Tong in the 
U.K.) FL1 and FL3.  Both the FL1 and FL3 can be used in the auto-notch 
mode or manual notch, and the notch depths (to my ear) are as deep or 
deeper than any of the aforementioned DSP units.  More importantly, 
neither the FL1 or FL3 seem to distort the voice while using the notch 
function to the level a DSP-based notch does.  And, the auto-notch  is 
very fast in operation.  Both of these filters also include the normal 
bandpass op amp-based filters.  These units were available from around 
1977 through 1984 I believe.  Just a thought, as not everything has to 
be DSP-based to work well . . .

Don W9CW