[Elecraft] Filters for K3

[Duncan Carter]

Ooops, typos are us.

Some of the responders have 
commented that the -6dB width of the 250 Hz filter is not that much 
smaller than the 400 Hz filter width, which is true.  T



Duncan Carter wrote:
> Just to add further confusion to the cw opinions, I currently have the 
> 250 Hz 8 pole, which I like as it allows me to work very close to strong 
> locals including those with key clicks,  and I plan the purchase the 8 
> pole 500 Hz Inrad filter on New Years Day.   Some of the responders have 
> commented that the -6dB width of the 250 Hz filter is not that much 
> smaller than the 400 Hz filter width, which is true.  The problem is 
> that the response on either side of the peak of the 250 Hz filter isn't 
> symmetrical, at least mine isn't, I assume the result of working with 
> real, physical, hardware..  One side matches well with the 250 Hz dsp 
> filter width but the other side is wider and sets most of the overall -6 
> dB with if the dsp filter is set to a wider bandwidth.
>
> Dunc, W5DC
>
>
> DM4iM wrote:
>   
>> Elecrafters, thanks for all the input.
>> I had many replies, personal mail or via the reflector.
>>
>> To sum it up:
>>
>> Matched filters are important for diversity.
>>
>> 8 votes for the 1.8khz, 4 for the 2.1 ssb filter for contesting.
>> Some use the 1.8khz ssb filter for cw, with the dsp set to narrower
>> bandwith. I think i will order one of those, it makes sense to use it
>> for cw-operation on a quiet band and in ssb contests when things get rough.
>>
>> The 200hz and 250hz cw filters got an equal number of votes, you left me
>> alone on this  ;-)
>>
>> The expense on 2 matched 5 pole or 2 8-pole filters is about the same,
>> so the criteria here is performance.
>>
>> May i call for a run-off?
>>
>> Thanks to all es HNY
>>
>> Martin
>>
>>   
>>     
>
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