[Elecraft] K3 Filter question

[Keith Heimbold]

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