[Elecraft] Is there a reason the receive is so Skinny

[Joe Subich, W4TV]

Don,

 > You can set the Low end down to 0.00 if you want, and the High end to
 > 4.2 kHz.  Each end of the DSP filter width is independent when using
 > Hi-Cut and Lo-Cut.

That is not entirely true.  The maximum difference between LO and HI
is limited to 4.0 KHz.  If one can stand the "roar" with LO = 0.00,
HI will not go above 4.00.  If one sets HI = 4.2 for maximum hiss, LO
will not go below 0.20.

73,

    ... Joe, W4TV


On 4/27/2014 9:44 AM, Don Wilhelm wrote:
> Larry,
>
> Use Hi-Cut and Lo-Cut rather than Width and Shift and you will have much
> better luck.
> You can set the Low end down to 0.00 if you want, and the High end to
> 4.2 kHz.  Each end of the DSP filter width is independent when using
> Hi-Cut and Lo-Cut.  The low end response of the audio stages will be a
> limiting factor as well as the low pass filter in the audio path to keep
> high frequency white noise at bay.
>
> I do not operate ESSB, so I have not measured the response with the DSP
> filter set that wide, but try it and see if that helps.
>
> 73,
> Don W3FPR
>
> On 4/27/2014 7:48 AM, Larry Wassmann wrote:
>> Joe maybe you can tell me where I am going wrong then. I use the 6K
>> ESSB filter and have the K3 set up for 4K transmission. When I, and
>> other look at my signal I am in fact transmitting out to 4K when
>> measured on a spectrum analyzers. But when I look at signals myself on
>> my receiver band pass display on the SA, all I can see is signals out
>> to about 3.5 or a little better. I have the center frequency set at
>> *155. I was told that is what it is supposed to be set at. If I move
>> the center frequency up to 200Hz yes I can receive up to 4K but the
>> bottom end amplitude is way down and when I try to play that audio
>> back via the DVR everyone says they have lost their bottom end. What
>> am I doing wrong? Are there other filters I should be using. I or none
>> of the other guys I know how to set up the K3 to faithfully capture
>> receive audio and play it back with frequencies below 200Hz, so if you
>> know how to maintain the same amplitude of signal on the receive low
>> end that matches the trans
> mi
>>   tted low end, we would really appreciate it. Thanks.
>>
>>
>
>
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