[Elecraft] 250 Hz and 400 Hz Filter Measurements

[Jim Brown]

On Fri, 16 Jul 2010 14:38:24 -0400, Guy Olinger K2AV wrote:

>Each to his own, just don't start a ban the 250 campaign.  

Both you and Ed raise good points. No intent there -- I agree that 
the so-called 250 Hz filter is slightly more useful than the 400 
Hz. My real objective is to get Inrad to clean up their act!  BUT 
-- take a look at the data in this link. Lots of food for thought. 
There's something different about the K3 Sub-RX, and the Roofing 
filters seem to fall apart below about -25dB. Makes a guy wonder 
what's going on! 

http://audiosystemsgroup.com/K3FilterStudy-250HzRoof.pdf 

73, Jim K9YC