Hi Mike and congratulations on the new-to-you K3.
When thinking about filters for the K3 or K3S remember that they
are roofing filters. The DSP code also filters the signal, so
unless you have a problem with nearby strong signals, the DSP
filtering may do everything you need. For example, when I find
very close CW signals, I may dial the DSP width down to 50 or
100 Hz, which frequently eliminates the interference. On the
other hand, during a contest when a local station is calling CQ
400 Hz up from the station I'm trying to work, the 250 Hz filter
is very helpful.
The FM filter can be used for AM operations.
My filter configuration is:
13 KHz FM filter
2.7 KHz 5 pole filter
2.1 KHz 8 pole filter for SSB
.25 KHz 8 pole filter for CW and digital operation
I just let the radio pick the right filter as I change the DSP
bandwidth. It all works very nicely during contests and DX chasing.
73 Bill AE6JV
On 1/30/17 at 5:21 PM, [email protected] (mtruss) wrote:
I have purchased a used K3, serial number 3000 or so, it has been sent back
to Elecraft for updates etc and returned to me working great so far. I
would like to update some things especially the roofing filters first so the
question I would like to ask is Has anybody upgraded from the 2.7 five pole
filter to the 2.8 eight pole filter? I understand the 8 pole is a wider
filter with 3 more filtering crystals , does it make any difference in
received audio? also could I use the fm filter for use in the
am position. Any other suggestions would be appreciated.
-------------------------------------------------------------------------
Bill Frantz | The first thing you need when | Periwinkle
(408)356-8506 | using a perimeter defense is a | 16345
Englewood Ave
www.pwpconsult.com | perimeter. | Los Gatos,
CA 95032
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