Thanks to all for the feedback! Really much appreciated.
Hope to test it soon 73, Jorge CX6VM/CW5W -----Mensaje original----- De: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] En nombre de Bill W4ZV Enviado el: Viernes, 11 de Diciembre de 2009 06:33 p.m. Para: elecraft@mailman.qth.net Asunto: Re: [Elecraft] K3 Diversity use with QRN David Cutter wrote: > > I have a "QRM Eliminator" by SEM (a UK firm long gone) awaiting repair and > I > wondered how best to use this in conjunction with diversity. It is a > phasing unit requiring another small (probably vertical) antenna to pick > up > local QRN, which is theoretically cancelled using its 3 controls. I > think > there are other similar products on the market. I'm thinking to combine > this with another rx antenna which would then feed the rx port of the > second > rx on the K3. It needs a little thought. > > David > G3UNA > I'm doing something similar. I have a pair of identical Beverages 887' long at 40 degrees azimuth. They're spaced ~1/8 wl apart and staggered ~1/4 wl. I'm feeding both to a MFJ-1025 Noise/Signal Phasing box. The forward lobe is relatively insensitive to phase shifting but you can steer a null to the rearand sides to reduce QRM or QRN by 20-25 dB from a specific direction. I use this as one input to my K3 in diversity and either a RX 4SQ or my transmit antenna for my other diversity antenna. W8JI has a webpage below with a number of useful mods to the 1025: http://www.w8ji.com/mfj-1025_1026.htm The 1025 works reasonably well for this but I'll soon replace it with the DXE NCC-1 which has a better front end and less internal noise. 73, Bill -- View this message in context: http://n2.nabble.com/K3-Diversity-use-with-QRN-tp4153111p4153609.html Sent from the Elecraft 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.426 / Virus Database: 270.14.98/2552 - Release Date: 12/08/09 07:34:00 ______________________________________________________________ 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
