[Elecraft] K3 Filter question

[Matt Zilmer]

Hi Keith,

I understand, and I'm running the 250 Hz filters in main and sub
receivers at 350 Hz, myself.  If you make this type of adjustment, you
might want to check the amount of gain for the filter with the changed
switch point.  It shouldn't be off by much, but worth checking anyway.

73,
matt W6NIA

On Wed, 26 Feb 2014 06:45:53 -0800, you wrote:

>Matt,
>
>Thanks, I was hoping that was the case. The 1.8 kHz filter is good for SSB but not exactly what I want at 350 kHz in CW. I think I will set it for 600 kHz and see what happens.
>
>I really appreciate your quick response.
>
>Keith
>AK6ZZ
>
>Sent from my iPhone please excuse typos
>
>> On Feb 26, 2014, at 6:38 AM, "Matt Zilmer" <mzilmer at roadrunner.com> wrote:
>> 
>> Hi Keith,
>> 
>> In the K3 utility program, you can change the filter bandwidths to
>> whatever you need.  Many ops use this function to set filter switch
>> points that are different than the listed bandwidth.  Look under the
>> Configure tab, then push the Configure Crystal Filters radio button.
>> 
>> Note that setting a non-standard filter bandwidth only changes the
>> point at which changing the Width (or Hi/Lo) control causes a switch
>> to the next filter in your "stack".  Actual filter performance stays
>> as it is.  Just a normal disclaimer... :)
>> 
>> 73,
>> matt W6NIA
>> 
>>> On Wed, 26 Feb 2014 06:28:59 -0800, you wrote:
>>> 
>>> I have recently been examining how my K3 filters operate and was curious if I could somehow expand the range I can use my lowest filter which is 250 kHz. It generally cuts out at 300 kHz and then my 1.8 kHz filter takes over. I would like to use the 250 kHz filter up to 400 kHz as I have read the filter is actually specified for 370 kHz. How do i change the cut out point for this filter? Is this something I can change in the utility program under filter calibration? I appreciate any advice on this.
>>> 
>>> Thanks,
>>> 
>>> Keith
>>> AK6ZZ
>>> 
>>> Sent from my iPhone please excuse typos
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>> Matt Zilmer, W6NIA
>> --
>> "Give me six hours to chop down a tree and I will
>> spend the first four sharpening the axe." -A. Lincoln
Matt Zilmer, W6NIA
--
"Give me six hours to chop down a tree and I will
spend the first four sharpening the axe." -A. Lincoln