[Elecraft] Differenced Between Filter "KFL3A-2.8_2.7sw" and "KFL3A-2.8K"?

[Jeff Maass]

I was planning to take a block of hours tomorrow to add the KRX3 to my K3/100. 

One of the things to do is to replace the 2.7-KHz filter with the 8-pole 2.8-KHz filter in
the main receiver. I have one "KFL3A-2.8K" that I ordered a while ago for this purpose. 

Now I see from the Elecraft order page that there is the note:

   "Order KFL3A-2.8_2.7sw instead if replacing
   2.7 kHz stock filter."
 
Does anyone know what the different is between "KFL3A-2.8K" and "KFL3A-2.8_2.7sw"? Should
I wait to get a "KFL3A-2.8_2.7sw" to swap out the old filter in the main receiver?


73,  Jeff  K8ND