Mike,
Unless you are doing SSB contesting, you will likely notice little
difference between the 2.7kHz and the 2.8kHz filters. The skirts on the
2.8kHz filter are a bit steeper than for the 2.7kHz.
If you have the subRX and want to do diversity receive, it would benefit
you to use the 2.8kHz filter in both the mainRX and the subRX.
Unless you have really critical ears, you will not notice a difference.
Yes, you can use the 13kHz filter for AM.
73,
Don W3FPR
On 1/30/2017 8:21 PM, 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.
Thanks
Mike W8FLT
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