[Elecraft] Yet another filter question

[Vic Rosenthal]

You aren't missing anything. The 6 dB bandwidth of the "400" Hz filter is closer to 450 Hz and the "250" is closer to 350. The "200" is close to 250. I took the advice of the K3's designer and chose the 200 to go with my 400. I've been happy with the combination.

Vic 4X6GP/K2VCO 

> On May 15, 2015, at 7:33 PM, Morgan Bailey, II <mcb2179 at gmail.com> wrote:
> 
> Hi all
> 
> I apologize if this topic has been covered here before.
> 
> I've had my K3 for about a year now, and I'm considering adding another
> roofing filter.  I currently have the 400 hz 8 pole filter and it has
> served me very well, but there were several instances during the 2014 WPX
> cw contest as well as 2014 SS where I needed something tighter.  I've seen
> the filter plots for the 5 pole and 8 pole filters, and while my initial
> gut feeling was to go with the 8 pole 250 hz filter, I'm now questioning
> whether or not that would be wise.  According to the plots, there isn't
> much difference between the two filters, and based on this data alone it
> would seem that the better choice would be to go with the 200hz 5-pole.
> 
> I'm sure I'm missing something here.
> 
> Thoughts?
> 
> Thanks
> 
> 73, Morgan, NS0R.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to k2vco.vic at gmail.com