[Elecraft] Variable bandwidth crystal filter

[Don Wilhelm]

Chuck,

True, true *BUT* the roofing filter can suppress signals before they get 
to the hardware AGC.  If one is happy with only the DSP filtering alone, 
then do not purchase any roofing filters at all, just go with the stock 
2.7 kHz roofing filter.  Different strokes for different folks, some 
need the additional filtering, others do not - and others will purchase 
a full set of filters just to have them available - the choice depends 
on your operating habits and expectations as well as your ham radio 
budget.  The casual operators will have great success with only the 2.7 
kHz filter, but a contester will want a full complement of roofing 
filters to fight those 'tough times'.

73,
Don W3FPR

Chuck Guenther wrote:
> I simply meant that if folks were looking for a more or less 
> continuously variable selectivity in the K3, then the 10 Hz increment 
> DSP filters would provide that, for all practical purposes.
> 73,
> Chuck  NI0C
>
>
> Ed K1EP wrote:
>   
>> At 8/5/2009 07:51 PM, Chuck Guenther wrote:
>>
>>     
>>>  With the upoming 10 Hz resolution DSP upgrade (Firmware 3.23 being
>>> talked about), I certainly wouldn't see much need for a variable BW
>>> roofing filter.
>>>       
>> Can you explain that relationship?
>>
>>
>>     
>>> 73,
>>> Chuck  NI0C
>>> K2, K3
>>>       
>>     
>
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