Andy, Thanks for sharing, and please keep us informed as things progress.
Regarding the narrow filtering for digital modes on the TS-2000, I think you are referring to the technique described by N0AN. While it isn't that difficult to use if you employ it frequently, it really is a bit daunting if you haven't used it for awhile. I think your phrase "radio equivalent of standing on your head" is appropriate. For TS-2000 owners who aren't prepared to get a SDR-IQ quite yet (Universal Radio is selling them for US $499.95), the N0AN procedure allows you to narrow your RX bandwidth down to as narrow as 50 Hz, but you have to be patient the first few times you try it. You can find documentation on this in the Files section of the KenwoodTS-2000 Yahoo Group: http://groups.yahoo.com/group/KenwoodTS-2000/files/PSK_Filtering_TS2000.pdf But clearly SDR is the future. That's an interesting preview of the Ham Radio Deluxe software that apparently will combine SDR and digital modes. Jim - K6JM (formerly K0ZXU) ----- Original Message ----- From: Andy obrien To: digitalradio Sent: Sunday, January 24, 2010 9:30 PM Subject: [digitalradio] Super narrow filter: PSK31 with HB9DRV SDR-RADIO Finally! When I bought my TS-2000 a couple of years ago, I was aware of one criticism for the digital operator.... super narrow filtering in SSB was not as easy to achieve as in other rigs.It can be done via a radio equivalent of standing on your head , using CW to receive and USB to transmit. The steps to achieve that are not easy to automate, so I have found it difficult to cope with those monster nearby PSK signals that swamp the waterfall, and could be eased out if I had better filtering in USB. So, tonight, I decided to see how that would be addressed with my new SDR-IQ receiver and Simon Brown's preview release of SDR-Radio . I was very happy to be easily able to dial in narrow filters, til my heart's content. All at the stroke of a mouse slider, couldn't be simpler. Simon's software is still very early in development , so not yet seamlessly integrated with his DM780. Take a look at this screen shot if you are interested, http://www.obriensweb.com/36hz.jpg I highlighted items of interest in a red ellipse. I used Mixw to decode the PSK31 because SDR-Radio does not do it itself. Yes, I know... Mixw displays 20M, but I was actually on 80M. I have yet to try this when there is a monster signal nearby that needs to be nulled out , but I think the results will be good. Andy K3UK
