[Elecraft] adding 250Hz filer, any improvement?

[Wayne Burdick]

On the other end of the spectrum: If the going is really tough, you  
might consider our 200 Hz, 5-pole filter. It's a favorite of CW and  
data-mode operators who routinely have to dig for weak ones between  
monster signals in CW and data modes.

73,
Wayne
N6KR

On Feb 8, 2011, at 11:07 AM, Scott Ellington wrote:

> QRM levels are generally much lower outside EU or NA.  Years ago, I  
> did a CW contest from ZL with a TS-50 and a single 500 Hz filter.   
> That would have been woefully inadequate in NA, but it was fine  
> there.  So, the question I would ask is whether anyone in a non-EU  
> or NA QTH has compared the K3 400 Hz filter with narrower DSP with  
> the 250 Hz filter.  Surely, the 400 Hz fliter +DSP would be far  
> superior to that old TS-50, so I would expect it to be fine.  Note  
> that the K3 "250 Hz" filter is really about 370 Hz wide, compared to  
> 435 for the "400 Hz" one, so the difference isn't that great, anyway.
>
> Perhaps Jorge can check this out in the next contest:  Set the "I"  
> filter to 400 Hz, and the "II" filter to 250 Hz, both with the 400  
> Hz xtal filter. I'd be interested in the results.
>
> 73,
>
> Scott  K9MA
>
>
>
> On Feb 8, 2011, at 11:49 AM, Jorge Diez - CX6VM wrote:
>
>> Hello,
>>
>>
>>
>> I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K  (1.8 kHz 8- 
>> pole)
>> filters in my K3.
>>
>>
>>
>> If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better  
>> to use
>> in contests?  Or with the 400Hz is enough?  Notice I am not in USA  
>> or EU
>> with strong stations near me, I don´t have the QRM this big  
>> populations
>> have, trying to reduce the splatters.
>>
>>
>>
>> 73,
>>
>> Jorge
>>
>> CX6VM/CW5W
>>
>> k3 #4077
>
> Scott Ellington
> Madison, Wisconsin
> USA
>
>
>
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