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Diversity RX and Speaker settings

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Rich-4

Diversity RX and Speaker settings

When using Diversity RX is it better to set the SPKRs to 1 or 2?

I typically leave my speakers set to "2" (main and sub). I was thinking
that maybe in diversity that "1" may be a better choice.

Any comments?

Rich

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Guy, K2AV

Re: Diversity RX and Speaker settings

No-No-No...

Diversity means one receiver in one ear and the other RX in the other ear.

I use two stereo speakers most of the time with diversity and it is
really quite good. I DON'T have to use headphones for diversity. The
two speakers are enough to spread the sound of the noise across what
seems like 140 degrees with my ears. That, with CW or SSB sounding
discreet in a single place before me (CW more so of course) is
wonderful for improving SSB that I simply could not copy monaural.

Remember it is your BRAIN'S processing of the sounds that does the
magic. Mixing the two audios into one signal prior to brain kills it.

73, Guy.

On Tue, Mar 29, 2011 at 9:45 PM, K3RWN <[hidden email]> wrote:

> When using Diversity RX is it better to set the SPKRs to 1 or 2?
>
>
>
> I typically leave my speakers set to "2" (main and sub). I was thinking
> that maybe in diversity that "1" may be a better choice.
>
>
>
> Any comments?
>
>
>
> Rich
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Rex Lint

Re: Diversity RX and Speaker settings

> Remember it is your BRAIN'S processing of the sounds that does the
>magic. Mixing the two audios into one signal prior to brain kills it.

Not altogether: With fading on one antenna and not on the other, then vice
versa, diversity makes listening to the result copyable where it's NOT if
you just listen to one or the other. They don't have to be in different
ears. A lot of folks only have hearing in 1 ear, and diversity is still
valuable!

-Rex-

K1HI
Rex Lint
Merrimack, NH
WWW.QRZ.COM/db/k1hi

-Rex-

Rex Lint, Consultant
26 Brek Drive
Merrimack, NH 03054
PH: 603-860-7651

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Guy Olinger K2AV
Sent: Tuesday, March 29, 2011 9:57 PM
To: K3RWN
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Diversity RX and Speaker settings

No-No-No...

Diversity means one receiver in one ear and the other RX in the other ear.

I use two stereo speakers most of the time with diversity and it is
really quite good. I DON'T have to use headphones for diversity. The
two speakers are enough to spread the sound of the noise across what
seems like 140 degrees with my ears. That, with CW or SSB sounding
discreet in a single place before me (CW more so of course) is
wonderful for improving SSB that I simply could not copy monaural.

Remember it is your BRAIN'S processing of the sounds that does the
magic. Mixing the two audios into one signal prior to brain kills it.

73, Guy.

On Tue, Mar 29, 2011 at 9:45 PM, K3RWN <[hidden email]> wrote:

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Jim Brown-10

Re: Diversity RX and Speaker settings

On 3/30/2011 9:40 AM, Rex Lint wrote:
>> Remember it is your BRAIN'S processing of the sounds that does the
>> >magic. Mixing the two audios into one signal prior to brain kills it.
> Not altogether: With fading on one antenna and not on the other, then vice
> versa, diversity makes listening to the result copyable where it's NOT if
> you just listen to one or the other. They don't have to be in different
> ears. A lot of folks only have hearing in 1 ear, and diversity is still
> valuable!

Actually, you're both right. There are time and phase differences
between the outputs of the two receivers that are a result of different
arrivals at the two antennas, and or the spacing of the two antennas, so
mixing them ELECTRICALLY into a single audio channel can strongly
degrade the received signal. This degradation does not occur, or is much
less severe, if the two signals are mixed acoustically (that is, by
feeding each to a different speaker). It is also minimized by mixing the
two signals at un-equal gain -- that is, by using more audio gain on one
RX than the other. This is one way that the "pan" configuration of the
front panel audio gain control could be helpful.

Bottom line -- you should always listen in both ears if both ears work,
but if you've got only one good ear, be very careful how you combine the
two receivers.

73, Jim K9YC
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Guy, K2AV

Re: Diversity RX and Speaker settings

In reply to this post by Rex Lint

I get that there is still a benefit on fading, but the spreading of
noise and fixing of discrete signals that goes on with no channel
mixing except in the brain has no parallel for working signals in the
noise. With true diversity in separated fading, the signal "walks"
from one side to the other WITHOUT losing the noise-busting advantage
of true diversity.

73, Guy.

On Wed, Mar 30, 2011 at 12:40 PM, Rex Lint <[hidden email]> wrote:

>> Remember it is your BRAIN'S processing of the sounds that does the
>>magic. Mixing the two audios into one signal prior to brain kills it.
>
> Not altogether: With fading on one antenna and not on the other, then vice
> versa, diversity makes listening to the result copyable where it's NOT if
> you just listen to one or the other. They don't have to be in different
> ears. A lot of folks only have hearing in 1 ear, and diversity is still
> valuable!
>
> -Rex-
>
> K1HI
> Rex Lint
> Merrimack, NH
> WWW.QRZ.COM/db/k1hi
>
>
> -Rex-
>
> Rex Lint, Consultant
> 26 Brek Drive
> Merrimack, NH 03054
> PH: 603-860-7651
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Guy Olinger K2AV
> Sent: Tuesday, March 29, 2011 9:57 PM
> To: K3RWN
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] Diversity RX and Speaker settings
>
> No-No-No...
>
> Diversity means one receiver in one ear and the other RX in the other ear.
>
> I use two stereo speakers most of the time with diversity and it is
> really quite good. I DON'T have to use headphones for diversity. The
> two speakers are enough to spread the sound of the noise across what
> seems like 140 degrees with my ears. That, with CW or SSB sounding
> discreet in a single place before me (CW more so of course) is
> wonderful for improving SSB that I simply could not copy monaural.
>
> Remember it is your BRAIN'S processing of the sounds that does the
> magic. Mixing the two audios into one signal prior to brain kills it.
>
> 73, Guy.
>
> On Tue, Mar 29, 2011 at 9:45 PM, K3RWN <[hidden email]> wrote:
>> When using Diversity RX is it better to set the SPKRs to 1 or 2?
>>
>>
>>
>> I typically leave my speakers set to "2" (main and sub). I was thinking
>> that maybe in diversity that "1" may be a better choice.
>>
>>
>>
>> Any comments?
>>
>>
>>
>> Rich
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

N5GE

Re: Diversity RX and Speaker settings

In reply to this post by Rich-4

I use both ears and I want to thank Elecraft for the excellent diversity
obtained in the K3 design. I hadn't used it much on 30m with my 1wl beverage,
because the beverage is too short. I don't have room here in the back yard for
a "REAL" beverage.

Last week end I installed one of the Pixel Technology 500Khz to 30Mhz loops on a
rotor at ten feet in the back yard. It works great on all bands and even helps
with fading when working the bands I can work on my Yagi-Uda antenna.

Sorry about the "plug" for the manufacturer, but many times that's how we find
about things. I had never heard of Elecraft until one day I was telling a
friend I was about to order a Ten-Tek Orion II and he told me about the K2 and
the new K3, which was not yet available.

Tom
N5GE

On Tue, 29 Mar 2011 21:45:50 -0400, "K3RWN" <[hidden email]> wrote:

>When using Diversity RX is it better to set the SPKRs to 1 or 2?
>
>
>
>I typically leave my speakers set to "2" (main and sub). I was thinking
>that maybe in diversity that "1" may be a better choice.
>
>
>
>Any comments?
>
>
>
>Rich
>
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html

Amateur Radio Operator N5GE