[Elecraft] Dual Receivers 2 different antennas Diversity receive

[Vic Rosenthal]

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 <barrylazar2 at gmail.com> 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: donovanf at starpower.net
> To: elecraft at mailman.qth.net
> 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: donovanf at starpower.net
>> To: elecraft at mailman.qth.net
>> 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" <k2vjk at k2vjk.com>
>> To: elecraft at mailman.qth.net
>> 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/
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> 
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