Gordon I faced the same decision as you just a couple of weeks ago but note I'm not a big CW op by any means so my filter choices reflect that. In my main I have a 6Khz for AM, 2.8, 2.1,.400. 250Hz I do Digital also all are 8 pole filters. First be sure that you don't want any more filters in the main receiver as it's much more work to remove the sub-receiver to add filter to the main later.
I decided for the sub to use 2 filters and they would cover everything with the DSP filtering they were the 2.8 and the 400 8 pole filters. So far it has worked out extremely well and I would not change anything nor add any other. filters for my operating needs. I do have 1 regret that when I ordered this K3 I had 1 already. I ordered it fully loaded all options except one the sub receiver that I should have done first off instead of waiting. 73, Fred/N0AZZ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of mm0gpz Sent: Tuesday, December 18, 2012 5:28 AM To: [email protected] Subject: [Elecraft] Sub RX Filters choice Hi. My K3 has a standard 2.7 Khz ssb filter, a narrow 2.1 Khz ssb filter and a 400 hz cw filter. I am planning to purchase the sub RX KRX3 and would like some filter advice please. I am much more interested in CW. Do I have to match up all these filters on the Sub RX for diversity? I know the 2.7 Khz is standard but for diversity I seem to remember reading the same filters should be in place? I also seem to recall that the filters are not cascaded so in essence, only one filter is in line at a time. So if I purchase only the 400 hz filter for the sub RX, it diversity reception will work fine as long as the 400 hz filter is selected for CW or SSB will be fine between > 2100 and 2700? What would happen if I engaged the 2.1 SSB filter in main RX and I don't have same filter in Sub RX. Thanks for your time. Gordon MM0GPZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
