250 HZ XFIL QUESTION
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The below applies to cw mode only at this time.
I have a basic K3 2.7hz 100 watt unit. Tonite I added an 8 pole 250 hz filter. After installation and software setup it appears that the filter does not work when I select filter 2. The radio was purchased assembled and the 2.7 hz filter is in slot one and i placed the 250hz filter in slot 5. However - if I select Dual Passband - the filter appears to work. The display shows both filter skirts and the bandwidth of the received signal is obviously isolated by the narrow setting. My questions are these: Do I have to use dual passband to use the 2nd filter? Does dual passband use some combination of main filter (2.7) and 250hz DSP filtering instead of passing the signal thru the first crystal filter and then the 250 hz crystal filter? If I have the K3 software setup correctly - if I select the 2nd filter - does this bypass the 2.7 hz filter and use the 2nd filter; and if so, why would it appear that my 250 hz filter is not passing a signal in this mode while it appears that it's passing it in Dual Passband mode. I'm aware that i've probably phrased my questions incomprehensibly, but I'm just wondering if i'm getting any use out of my 2nd 250hz crystal, or if it's not working because of some software setup error i've made or whether it's defective. Thanks - Mark (N5EAT) _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Since the filter is in slot 5, you'll need to configure the filter in
slot 5 in the config menu. Review page 43 in the manual. "Crystal Filter Setup" 73 de Joseph Durnal NE3R On Mon, Jun 23, 2008 at 8:42 PM, Mark <[hidden email]> wrote: > The below applies to cw mode only at this time. > > I have a basic K3 2.7hz 100 watt unit. Tonite I added an 8 pole 250 hz filter. After > installation and software setup it appears that the filter does not work when I select > filter 2. The radio was purchased assembled and the 2.7 hz filter is in slot one and > i placed the 250hz filter in slot 5. > > However - if I select Dual Passband - the filter appears to work. The display shows both > filter skirts and the bandwidth of the received signal is obviously isolated by the narrow setting. > > My questions are these: Do I have to use dual passband to use the 2nd filter? Does dual passband use some combination of main filter (2.7) and 250hz DSP filtering instead of passing the signal thru the first crystal filter and then the 250 hz crystal filter? If I have the > K3 software setup correctly - if I select the 2nd filter - does this bypass the 2.7 hz filter and use the 2nd filter; and if so, why would it appear that my 250 hz filter is not passing a signal in this mode while it appears that it's passing it in Dual Passband mode. > > I'm aware that i've probably phrased my questions incomprehensibly, but I'm just wondering > if i'm getting any use out of my 2nd 250hz crystal, or if it's not working because of some software setup error i've made or whether it's defective. > > Thanks - Mark (N5EAT) > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by N5EAT
Mark
Why did you put that 250hz filter in slot 5 then select filter 2? Steve Ellington [hidden email] ----- Original Message ----- From: "Mark" <[hidden email]> To: <[hidden email]> Sent: Monday, June 23, 2008 8:42 PM Subject: [Elecraft] 250 HZ XFIL QUESTION The below applies to cw mode only at this time. I have a basic K3 2.7hz 100 watt unit. Tonite I added an 8 pole 250 hz filter. After installation and software setup it appears that the filter does not work when I select filter 2. The radio was purchased assembled and the 2.7 hz filter is in slot one and i placed the 250hz filter in slot 5. However - if I select Dual Passband - the filter appears to work. The display shows both filter skirts and the bandwidth of the received signal is obviously isolated by the narrow setting. My questions are these: Do I have to use dual passband to use the 2nd filter? Does dual passband use some combination of main filter (2.7) and 250hz DSP filtering instead of passing the signal thru the first crystal filter and then the 250 hz crystal filter? If I have the K3 software setup correctly - if I select the 2nd filter - does this bypass the 2.7 hz filter and use the 2nd filter; and if so, why would it appear that my 250 hz filter is not passing a signal in this mode while it appears that it's passing it in Dual Passband mode. I'm aware that i've probably phrased my questions incomprehensibly, but I'm just wondering if i'm getting any use out of my 2nd 250hz crystal, or if it's not working because of some software setup error i've made or whether it's defective. Thanks - Mark (N5EAT) _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.4.1/1515 - Release Date: 6/23/2008 7:16 PM _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by N5EAT
Thanks for the emails I received concerning the egregious error in thinking I made. Basically - since I was installing my second filter I configured filter slot 2 instead of the correct slot. Sometimes one reads what one is expecting instead of what's on the page......
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