Since the filter is in slot 5, you'll need to configure the filter in
slot 5 in the config menu.

Review page 43 in the manual.  "Crystal Filter Setup"

73 de Joseph Durnal NE3R


On Mon, Jun 23, 2008 at 8:42 PM, Mark <[EMAIL PROTECTED]> wrote:
> The below applies to cw mode only at this time.
>
> I have a basic K3 2.7hz 100 watt unit.  Tonite I added an 8 pole 250 hz 
> filter.  After
> installation and software setup it appears that the filter does not work when 
> I select
> filter 2.  The radio was purchased assembled and the 2.7 hz filter is in slot 
> one and
> i placed the 250hz filter in slot 5.
>
> However - if I select Dual Passband - the filter appears to work. The display 
> shows both
> filter skirts and the bandwidth of the received signal is obviously isolated 
> by the narrow setting.
>
> My questions are these:  Do I have to use dual passband to use the 2nd 
> filter?  Does dual passband use some combination of main filter (2.7) and 
> 250hz DSP filtering instead of passing the signal thru the first crystal 
> filter and then the 250 hz crystal filter?  If I have the
> K3 software setup correctly - if I select the 2nd filter - does this bypass 
> the 2.7 hz filter and use the 2nd filter; and if so,  why would it appear 
> that my 250 hz filter is not passing a signal in this mode while it appears 
> that it's passing it in Dual Passband mode.
>
> I'm aware that i've probably phrased my questions incomprehensibly, but I'm 
> just wondering
> if i'm getting any use out of my 2nd 250hz crystal, or if it's not working 
> because of some software setup error i've made or whether it's defective.
>
> Thanks - Mark (N5EAT)
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