Jim,
I think most K3 owners understand that. Those who call CQ during
crowded band conditions also understand that their ears will take less
of a beating when using a 1 kHz DSP bandwidth in conjunction with a 1
kHz roofing filter instead of the next wider roofing filter, which, in a
K3 is often a 2.7 or 2.8 kHz filter. That's the wonderful thing about a
K3, the owner can equip it according to his or her personal preference.
My ears have taking enough beatings over the years from stations outside
of the filter bandwidth pumping the AGC while using lesser receivers to
know that I prefer a tight roofing filter bandwidth so that the stations
outside of my DSP bandwidth have minimal effect on what I am hearing.
I have used my "Field Day" K3 to call CQ during crowd banded conditions
before and after I added the 1 kHz filter and have found the improvement
well worth the price of the filter. Your mileage may vary.
73,
Bill - NA5DX
On 7/25/2017 10:08 PM, Jim Brown wrote:
On 7/25/2017 7:11 PM, Bill Breeden wrote:
I found that I was missing stations that were calling on the skirts
of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band
to answer CQs I still prefer listen through the 400 Hz filter.
It's important to remember that IF bandwidth is determined by DSP, and
continuously adjustable. The plug-in filters are ROOFING filters --
their primary function is to protect the DSP from overload by very
strong stations outside the bandwidth of the DSP IF. They have the
secondary function of adding the filtering provided by the DSP, and
when the DSP and the roofing filter are at the same bandwidth, the
filter skirts become steeper (sharper).
Bottom line -- we don't need to buy a 1 kHz filter to get 1 kHz IF
bandwidth, because the DSP already provides that. This is not your
grandfather's radio! :)
73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to breede...@cableone.net
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
