Re: [Elecraft] K3 Filter question. Again?
Phil, Go to this link on the Elecraft website: http://www.elecraft.com/K3/Roofing_Filters.htm And this link: http://www.elecraft.com/K3/K3_filter_plots.htm Dave, N4QS - Original Message - From: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net Sent: Wednesday, August 08, 2012 8:12 PM Subject: [Elecraft] K3 Filter question. Again? Why an 8 pole filter OR Why a 5 pole filter? Yeah I know the 5 poles are cheaper... but other than that. Phil Santa Fe __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Filter question Again?
Those 8-pole filters have steeper skirts. Either the 5- or 8-pole work quite well. I use 5-pole for the narrower filters (250, 500), and the 8-pole for 1.8, 2.8, 13 KHz bandwidths. 73, matt W6NIA K3 #24 On Wed, 08 Aug 2012 19:12:58 -0600, you wrote: Why an 8 pole filter OR Why a 5 pole filter? Yeah I know the 5 poles are cheaper... but other than that. Phil Santa Fe __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Filter question Again?
My thought on the 5 pole was that it would give you some protection but because the skirts were not as steep you could hear someone calling you off frequency better. They would be down but not out. The 5's have slightly less insertion loss and are cheaper. On the other hand they need an offset adjustment and therefore don't lend themselves to diversity reception as well. I think the answer is: it depends on your style of operating and what you want to spend. The reason there is more than one choice is that one size does not fit all. Or, as my Nana used to say, that's why they don't make it all vanilla. Sent from my iPad On Aug 8, 2012, at 10:04 PM, Matt Zilmer mzil...@verizon.net wrote: Those 8-pole filters have steeper skirts. Either the 5- or 8-pole work quite well. I use 5-pole for the narrower filters (250, 500), and the 8-pole for 1.8, 2.8, 13 KHz bandwidths. 73, matt W6NIA K3 #24 On Wed, 08 Aug 2012 19:12:58 -0600, you wrote: Why an 8 pole filter OR Why a 5 pole filter? Yeah I know the 5 poles are cheaper... but other than that. Phil Santa Fe __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Filter question Again?
Good point. It would depend upon whether or not you'd want to hear someone so far from zero beat. 73, matt On Wed, 08 Aug 2012 23:38:06 -0400, you wrote: My thought on the 5 pole was that it would give you some protection but because the skirts were not as steep you could hear someone calling you off frequency better. They would be down but not out. The 5's have slightly less insertion loss and are cheaper. On the other hand they need an offset adjustment and therefore don't lend themselves to diversity reception as well. I think the answer is: it depends on your style of operating and what you want to spend. The reason there is more than one choice is that one size does not fit all. Or, as my Nana used to say, that's why they don't make it all vanilla. Sent from my iPad On Aug 8, 2012, at 10:04 PM, Matt Zilmer mzil...@verizon.net wrote: Those 8-pole filters have steeper skirts. Either the 5- or 8-pole work quite well. I use 5-pole for the narrower filters (250, 500), and the 8-pole for 1.8, 2.8, 13 KHz bandwidths. 73, matt W6NIA K3 #24 On Wed, 08 Aug 2012 19:12:58 -0600, you wrote: Why an 8 pole filter OR Why a 5 pole filter? Yeah I know the 5 poles are cheaper... but other than that. Phil Santa Fe __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
