That is a lot of filters ... 1) The DSP is quite effective and there is not much difference (if any) in the performance of the 2.8 KHz 8-pole filter vs. the 2.7 KHz 5-pole filters. Even if one pays the extra $30 for a matched pair of 2.7 KHz filters, the added cost of the 2.8 KHz pair is $180.00
2) Unless you are in very heavy QRM/pile-up situations the roofing filter does not provide a lot of "value added" since the final bandwidth is determined by the DSP. The 1 KHz filters add little benefit vs. the 1.8 KHz or 1.5 KHz filters. 3) The 13 KHz filter can be used for AM receive - there is no benefit in having both the 13 and 6 KHz filters in the sub RX. It is a shame that Elecraft still do not permit use of the 13 KHz for AM and ESSB transmit (even if it were offset 3 KHz in transmit for additional image rejection). A less expensive line-up that seems to provide maximum (IMO) flexibility/performance is: Main: 13 - 2.7 - 1.8 (1.5) - 400 - 200 Sub: 13 - 2.7 - 400 73, ... Joe, W4TV > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ed G > Sent: Monday, April 13, 2009 7:24 PM > To: [email protected] > Subject: [Elecraft] Filter Selection Approach > > > Hello, > I am getting ready to order a K3 with subreceiver soon, > and have been thinking about which filters to order. From > most of what I read, folks seem to order duplicates for the > subreceiver of what they have ordered for the main receiver, > or perhaps just go with just a couple narrower ones for the > subreceiver. Since I work mostly CW, and am not too > interested in diversity reception (don't have the antennas > either), I was thinking of the following: > > Main Rx: 2.8 - 1.8 - 1 - 400 - 200 > Sub Rx: 13 - 6 - 2.8 - 2.1 - 1 or 400 > > I know that's a lot of filters, but other than going broke, > are there any drawbacks to this? Has anyone else tried to > essentially give themselves all the filter options by > populating both receivers with different filters? > > --Ed-- > ______________________________________________________________ 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
