Re: 250 Hz and 400 Hz Filter Measurements

Posted by Jim Brown-10 on Jul 16, 2010; 7:28pm
URL: http://elecraft.85.s1.nabble.com/250-Hz-and-400-Hz-Filter-Measurements-tp5300671p5303443.html

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


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html