I notice a big increase in intelligibility of cw signals in conditions of QSB and even QRN with diversity on 40 through 10 meters (well, at least I have dim memories of 15/12/10 m). My antennas are only about 10m apart, but one is a horizontal dipole and the other is a vertically polarized small loop (a “pixel loop”, now made by DX Engineering). The dipole is also about 5m higher than the loop.
Victor 4X6GP > On 29 Jan 2020, at 2:09, Barry <[email protected]> wrote: > > Frank, > Not all of us have your backyard, like me. Using two different > polarization will get you there also, And, cross polarization will enhance > decoupling between the antennas. > > 73, > Barry > K3NDM > > ------ Original Message ------ > From: [email protected] > To: [email protected] > Sent: 1/28/2020 2:41:40 PM > Subject: Re: [Elecraft] Dual Receivers 2 different antennas Diversity receive > >> I should have clarified 540 feet of separation on 160 meters, >> much less on higher bands (e.g. 280 feet on 80, 140 feet on 40) >> >> >> 73 >> Frank >> W3LPL >> >> ----- Original Message ----- >> >> From: [email protected] >> To: [email protected] >> Sent: Tuesday, January 28, 2020 7:38:07 PM >> Subject: Re: [Elecraft] Dual Receivers 2 different antennas Diversity receive >> >> 60 feet of antenna separation does not provide diversity capability. >> Diversity depends on independent fading of received signals, >> accomplished by at least one wavelength of spacing between two >> identically polarized antennas or by two antennas with opposite >> polarization. More than one wavelength of spacing will provide >> even better diversity performance. >> >> >> One wavelength of spacing requires 540 feet of spacing, >> almost ten times more what you're proposing to use. >> >> >> 73 >> Frank >> W3LPL >> >> >> >> >> >> ----- Original Message ----- >> >> From: "VernonJ" <[email protected]> >> To: [email protected] >> Sent: Tuesday, January 28, 2020 7:27:31 PM >> Subject: [Elecraft] Dual Receivers 2 different antennas Diversity receive >> >> My K3S has Main and Sub receivers. I would like to use Diversity receive with >> the Main using the transmit antenna, and my Sub using a small receive loop. >> Is there sufficient isolation on the Receive Only antenna connection to >> protect the Sub? Antennas are 60 feet apart, and I intend to run 500 watts >> at some point. If I need additional isolation and protection, how would I do >> this? Thanks. >> >> >> >> -- >> Sent from: http://elecraft.365791.n2.nabble.com/ >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
