[Elecraft] K3 Filter Choices

[Matt Zilmer]

Hi Mark,

You'll need, at minimum, a 2.7 or 2.8 KHz filter for use in transmit.
Either one is fine, and they both work quite well.  This is the
"basic" roofing filter used on receive as well.

If you operate primarily SSB, the 2.7/2.8 roofing filter is usually
enough.  If you're into contesting, I'd suggest 1.8 or 2.1 KHz as
well.

For CW and data modes, a smaller width filter might be helpful.  I
have found that the 1KHz and 250 Hz filters are a good complementary
pair for CW and data modes like PSK31.  If you only operate CW, any
filter at or under 500 Hz is fine.

AM and FM modes require wider filters (6 KHz and 15 KHz, respectively)
and this is detailed out on the Elecraft K3's web page.  

A nice basic configuration would be 2.8 KHz for SSB and 500 Hz for CW.
You can always add to this since there are five roofing filter
positions.

73,
matt W6NIA
K3 #24, P3 #14

On Sun, 03 Oct 2010 18:27:50 -0500 (CDT), you wrote:

>
>Hi Guys, in my quest to purchase a new K3 I am worndering about 8 pole filter choices.  I see that there is a 1.8 KHZ 8 pole ssb filter and a 250 HZ 8 pole cw filter that is avaiable.  If one purchases one of these filters wouldn't that basically solve the problem of not needing all the other filters at different KHZ?  This probably is a stupid question, but would really like to learn.  Mark KB3Z
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