Edward R. Cole wrote: > > I'm not sure that adapting the sw for noise > cancellation will take that much extra > processing. Reversing phase is a simple digital > inversion. >
It's also very simple to do at RF with one of the external phase boxes. I've used all 3 of these and rate them in the following order: 1. DXE NCC-1 (the best but expensive) 2. MFJ-1025 (very good with W8JI's mods below) 3. Timewave ANC-4 References: http://www.dxengineering.com/Parts.asp?ID=1227&PLID=215&SecID=114&DeptID=12&PartNo=DXE-NCC-1 http://www.mfjenterprises.com/Product.php?productid=MFJ-1025 http://www.w8ji.com/mfj-1025_1026.htm http://www.timewave.com/support/ANC-4/anc4.html I personally wouldn't give up diversity for noise canceling, but I don't live on a city lot. I'd use an external phase box with noise sense antenna aimed at the noise source combined with an RX antenna via a phasing box into RX ANT and a second RX antenna into AUX RF for diversity. Using DSP to do what a $180 box does reasonably well seems like overkill. This reminds me of the Flex Radio guru who proposed a 4 RX/TX solution to what an external 4SQ phase box does for $350...plus you need only one feedline to the controller instead of 4 to the shack, one 1.5 kW amp instead of 4 each $375 amps, and much less complexity. "A technical solution looking for an application" comes to mind. 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/Diversity-Receive-as-Noise-Canceling-tp5782138p5788410.html Sent from the [K3] mailing list archive at Nabble.com. ______________________________________________________________ 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
