[Elecraft] KRX3

[Jim Brown]

Hi Tom,

I don't have a KRX3 yet (it's backordered), but I've been using a 
K3 for a while. If you've gone into setup for each filter, told 
the software what bandwidth filter is in each filter position, and 
turned each filter on, as you slowly turn bandwidth control you 
should hear an audibly greater change in the character of the band 
noise when the roofer kicks in or out. 

The roofer switches in at whatever frequency you tell the 
software. You can tell it, for example, that the 400 Hz filter is 
a 500 Hz filter, and it will kick in at 500 Hz. 

BTW -- several of us with the capability to measure the filters 
have found that the 8-pole filters DO have enough slop in their 
center frequency that you MAY need to shift their centering at 
bit. My 400 Hz filter is about 45 Hz off, so it was a tossup 
between 40 and 50 Hz. 

73,

Jim K9YC

On Wed, 6 Aug 2008 00:14:24 -0400, Tom W8JI wrote:

>How do I know the roofing filters in the KRX3 are being 
>selected? Are they automatically selected when the roofing 
>filter in the main receiver is picked?