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2nd RX

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k0wa@swbell.net

2nd RX

I am curious....

What is the benefit of a 2nd RX in the K3? I have tried to look for information
and opinion in the internet but what I have found is "Dual Diversity Receive."

Could someone enlighten me as to why one would have a 2nd RX in the K3 other
than DDR?

Lee - K0WA
"Still asking questions at the age of 60"

--------------------------------------------------------

In our day and age it seems that Common Sense is in short supply. If you don't
have any Common Sense - get some Common Sense and use it. If you can't find any
Common Sense, ask for help from somebody who has some Common Sense. Is Common
Sense divine?

Common Sense is the image of the Creator expressing revealed truth in my mind.
- John W. (Kansas)
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Phil Hystad-3

Re: 2nd RX

And, count me as another person asking that question (at the age of 63).

73, phil, K7PEH

On Mar 4, 2011, at 9:14 AM, Lee Buller wrote:

> I am curious....
>
> What is the benefit of a 2nd RX in the K3? I have tried to look for information
> and opinion in the internet but what I have found is "Dual Diversity Receive."
>
> Could someone enlighten me as to why one would have a 2nd RX in the K3 other
> than DDR?
>
> Lee - K0WA
> "Still asking questions at the age of 60"
>
> --------------------------------------------------------
>
> In our day and age it seems that Common Sense is in short supply. If you don't
> have any Common Sense - get some Common Sense and use it. If you can't find any
> Common Sense, ask for help from somebody who has some Common Sense. Is Common
> Sense divine?
>
> Common Sense is the image of the Creator expressing revealed truth in my mind.
> - John W. (Kansas)
> ______________________________________________________________
> 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

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Mike WA8BXN

Re: 2nd RX

In reply to this post by k0wa@swbell.net

If you are operating split frequencies for transmit and receive, the a
second RX lets you listen to both frequencies at the same time.

73 - Mike WA8BXN

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Jim Brown-10

Re: 2nd RX

In reply to this post by k0wa@swbell.net

On 3/4/2011 9:14 AM, Lee Buller wrote:
> Could someone enlighten me as to why one would have a 2nd RX in the K3 other than DDR?

If you work 40, 80, or 160M, diversity reception with a dedicated RX
antenna can be a VERY good thing, helping you hear things you otherwise
might not have heard.

If you are a DX chaser, you can listen on your TX frequency when working
split. That can help a LOT when trying to find a place where your signal
might stand out from the competition. The P3 is also quite helpful in
the same way.

If you are a contester, you can use the second RX to search for
multipliers while you're CQing (not while transmitting though).

If you work VHF (or even 10M) and are looking for band openings, you can
monitor two frequencies (on the same band) at the same time, one in each
ear (or external loudspeaker), for example, one in the CW portion, the
other on SSB. Again, the P3 is also quite helpful in the same application.

I've used my 2nd RX in all but the last application.

73, Jim K9YC
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Guy, K2AV

Re: 2nd RX

In reply to this post by Mike WA8BXN

In a contest, one can work something called SO2V, where off a run frequency,
you scan the band away from your run frequency, or move it to a new spot and
pick it off while maintaining your run frequency. Not easy to do (the
distraction and mental breakdown quotient is very high for this kind of
stuff), but extremely handy if you can get your brain to do it.

You can put the other RX on another antenna and listen to other bands at the
same time, including AM broadcast or HF broadcast. I do that a lot during
the summer listening to Yankees baseball games. I will often just leave the
second RX on the other frequency. Why use this quality of RX for that
purpose? I can listen to them using SSB on a RX antenna and use fast AGC on
a pretty bad signal that would be intolerable listening AM. I set the
frequency to 880.000 kHz and the audio is perfect, no trace of Donald Duck.
It even renders music acceptably though not quite perfectly. When noisy I
narrow the bandwidth for best balance of "intelligible sound" and
signal-to-noise.

I use DDR for 160 and 80. The improvement in RX is immense and allows me to
pull out very poor signals. The spread of noise in the headphones allows me
to effectively ignore the noise.

Setting the TX in the clear with working someone split is invaluable. I
often run up the bandwidth on the second RX (listening to the split
frequency) to 2.7 kHz just to hear the range and detect the DX's pattern on
RX.

There was something else but cannot recall at the moment...

73, Guy

On Fri, Mar 4, 2011 at 12:19 PM, Mike WA8BXN <[hidden email]> wrote:

> If you are operating split frequencies for transmit and receive, the a
> second RX lets you listen to both frequencies at the same time.
>
> 73 - Mike WA8BXN
>
>
> ______________________________________________________________
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>

Greg - AB7R

Re: 2nd RX

In reply to this post by Phil Hystad-3

Aside from diversity receive it provides the utility to be able to receive
on two different bands at the same time.

On Fri, Mar 4, 2011 at 9:18 AM, Phil Hystad <[hidden email]> wrote:

> And, count me as another person asking that question (at the age of 63).
>
> 73, phil, K7PEH
>
>
> On Mar 4, 2011, at 9:14 AM, Lee Buller wrote:
>
> > I am curious....
> >
> > What is the benefit of a 2nd RX in the K3? I have tried to look for
> information
> > and opinion in the internet but what I have found is "Dual Diversity
> Receive."
> >
> > Could someone enlighten me as to why one would have a 2nd RX in the K3
> other
> > than DDR?
> >
> > Lee - K0WA
> > "Still asking questions at the age of 60"
> >
> > --------------------------------------------------------
> >
> > In our day and age it seems that Common Sense is in short supply. If you
> don't
> > have any Common Sense - get some Common Sense and use it. If you can't
> find any
> > Common Sense, ask for help from somebody who has some Common Sense. Is
> Common
> > Sense divine?
> >
> > Common Sense is the image of the Creator expressing revealed truth in my
> mind.
> > - John W. (Kansas)
> > ______________________________________________________________
> > 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
>
> ______________________________________________________________
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>
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>

wayne burdick

Re: 2nd RX

Administrator

In reply to this post by k0wa@swbell.net

Hi Lee,

There are three reasons you might want the sub-RX: (1) diversity; (2)
listening to both your RX and TX frequencies when operating split; (3)
monitoring one band while you operate on the other.

The K3's sub RX has identical performance to the main RX, so it excels
at all of these applications.

73,
Wayne
N6KR

Lee Buller wrote:

> I am curious....
>
> What is the benefit of a 2nd RX in the K3? ...

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Rick Prather-2

Re: 2nd RX

In reply to this post by k0wa@swbell.net

I will sometimes leave one receiver monitoring the PSK or RTTY (using wide band RTTY) bands while I go off looking for DX on other modes or bands.

Rick
K6LE

On 3/4/2011, at 9:14 , Lee Buller wrote:

wayne burdick

Re: 2nd RX

Administrator

In reply to this post by wayne burdick

Actually there's a fourth reason. If you use QRQ CW mode (ultra-fast
break-in), you can't normally use split or RIT. But if you have the
sub receiver installed, you can transmit on VFO A and receive on VFO
B, which will achieve the same goal in many situations.

73,
Wayne
N6KR

On Mar 4, 2011, at 10:10 AM, Wayne Burdick wrote:

> Hi Lee,
>
> There are three reasons you might want the sub-RX: (1) diversity; (2)
> listening to both your RX and TX frequencies when operating split; (3)
> monitoring one band while you operate on the other.
>
> The K3's sub RX has identical performance to the main RX, so it excels
> at all of these applications.
>
> 73,
> Wayne
> N6KR
>
> Lee Buller wrote:
>
>> I am curious....
>>
>> What is the benefit of a 2nd RX in the K3? ...
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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Ken G Kopp

Re: 2nd RX

In reply to this post by Greg - AB7R

I use the 2nd receiver to monitor 50.125 for 6M
band openings. The receiver has a dedicated
antenna input connected to a 6M GP and doesn't
use any of the internal RX antenna switching options.

73! Ken Kopp - K0PP
[hidden email]
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g0afh

Re: 2nd RX

In reply to this post by wayne burdick

And another...

With a suitable dual rx 2m transverter and two arrays I can listen to
two directions at once. Very useful in contests.

73
Ian
G0AFH.

On 04/03/2011 18:16, Wayne Burdick wrote:

> Actually there's a fourth reason. If you use QRQ CW mode (ultra-fast
> break-in), you can't normally use split or RIT. But if you have the
> sub receiver installed, you can transmit on VFO A and receive on VFO
> B, which will achieve the same goal in many situations.
>
> 73,
> Wayne
> N6KR
>
>
> On Mar 4, 2011, at 10:10 AM, Wayne Burdick wrote:
>
>> Hi Lee,
>>
>> There are three reasons you might want the sub-RX: (1) diversity; (2)
>> listening to both your RX and TX frequencies when operating split; (3)
>> monitoring one band while you operate on the other.
>>
>> The K3's sub RX has identical performance to the main RX, so it excels
>> at all of these applications.
>>
>> 73,
>> Wayne
>> N6KR
>>
>> Lee Buller wrote:
>>
>>> I am curious....
>>>
>>> What is the benefit of a 2nd RX in the K3? ...
>> ______________________________________________________________
>> 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
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> Help: http://mailman.qth.net/mmfaq.htm
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>
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Igor Sokolov-2

Re: 2nd RX

And the same on HF. Working pile up is a lot easier in the contest when you
have two antennas beaming different directions and 2 RX on the same
frequency. In our case EU signals on the western antenna are in the left ear
and JA/Pacific signals are in the right ear. Since both receivers have
independent AGC strong EU signals do not offset AGS on the eastern antenna
and allow one to hear weak signals from Pacific DX stations in the pile up.

73, Igor UA9CDC

> And another...
>
> With a suitable dual rx 2m transverter and two arrays I can listen to
> two directions at once. Very useful in contests.
>
> 73
> Ian
> G0AFH.
>
> On 04/03/2011 18:16, Wayne Burdick wrote:
>> Actually there's a fourth reason. If you use QRQ CW mode (ultra-fast
>> break-in), you can't normally use split or RIT. But if you have the
>> sub receiver installed, you can transmit on VFO A and receive on VFO
>> B, which will achieve the same goal in many situations.
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>> On Mar 4, 2011, at 10:10 AM, Wayne Burdick wrote:
>>
>>> Hi Lee,
>>>
>>> There are three reasons you might want the sub-RX: (1) diversity; (2)
>>> listening to both your RX and TX frequencies when operating split; (3)
>>> monitoring one band while you operate on the other.
>>>
>>> The K3's sub RX has identical performance to the main RX, so it excels
>>> at all of these applications.
>>>
>>> 73,
>>> Wayne
>>> N6KR
>>>
>>> Lee Buller wrote:
>>>
>>>> I am curious....
>>>>
>>>> What is the benefit of a 2nd RX in the K3? ...
>>> ______________________________________________________________
>>> 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
> ______________________________________________________________
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AC7AC

Re: 2nd RX

In reply to this post by k0wa@swbell.net

CONTENTS DELETED

The author has deleted this message.

Re: 2nd RX

In reply to this post by Phil Hystad-3

Some other reasons are to listen to the pile while listening to the DX station
when the DX is working split and to search the band with one receiver while
monitoring a net or waiting for a QRX to return. Also to search and pounce
while running in a contest. Willis 'Cookie' Cooke

K5EWJ

________________________________
From: Phil Hystad <[hidden email]>
To: Lee Buller <[hidden email]>
Cc: Elecraft Reflector <[hidden email]>
Sent: Fri, March 4, 2011 11:18:40 AM
Subject: Re: [Elecraft] 2nd RX

And, count me as another person asking that question (at the age of 63).

73, phil, K7PEH

On Mar 4, 2011, at 9:14 AM, Lee Buller wrote:

> I am curious....
>
> What is the benefit of a 2nd RX in the K3? I have tried to look for
>information
>
> and opinion in the internet but what I have found is "Dual Diversity Receive."
>
> Could someone enlighten me as to why one would have a 2nd RX in the K3 other
> than DDR?
>
> Lee - K0WA
> "Still asking questions at the age of 60"
>
> --------------------------------------------------------
>
> In our day and age it seems that Common Sense is in short supply. If you don't
>
> have any Common Sense - get some Common Sense and use it. If you can't find
>any
>
> Common Sense, ask for help from somebody who has some Common Sense. Is Common

> Sense divine?
>
> Common Sense is the image of the Creator expressing revealed truth in my mind.

> - John W. (Kansas)
> ______________________________________________________________
> 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

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Edward R Cole

Re: 2nd RX

In reply to this post by k0wa@swbell.net

a Fifth reason is only a WISH, at this time:

Duplex receive on another band (e.g. receive 435-MHz downlink of a
satellite while transmitting 145-MHz on the uplink).

I am wondering if it might be possible to do by extracting the sub-Rx
IF to a HF receiver (or P3 or other SDR with IQ to a computer running
sw that can perform the demod). I suspect the 15-KHz SDR inside the
K3 shares ckts between Tx and Rx preventing full-duplex. But if the
sub-Rx 1st conversion could function using the Rx antenna while the
main radio is in Tx using Ant1 (or 2), this could be done (I think).

Two transverters would be used: one to receive and the other to transmit.

73, Ed - KL7UW

------------------------------

Message: 12
Date: Fri, 4 Mar 2011 10:16:22 -0800
From: Wayne Burdick <[hidden email]>
Subject: Re: [Elecraft] 2nd RX
To: Lee Buller <[hidden email]>
Cc: Elecraft Reflector <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

Actually there's a fourth reason. If you use QRQ CW mode (ultra-fast
break-in), you can't normally use split or RIT. But if you have the
sub receiver installed, you can transmit on VFO A and receive on VFO
B, which will achieve the same goal in many situations.

73,
Wayne
N6KR

On Mar 4, 2011, at 10:10 AM, Wayne Burdick wrote:

> Hi Lee,
>
> There are three reasons you might want the sub-RX: (1) diversity; (2)
> listening to both your RX and TX frequencies when operating split; (3)
> monitoring one band while you operate on the other.
>
> The K3's sub RX has identical performance to the main RX, so it excels
> at all of these applications.
>
> 73,
> Wayne
> N6KR

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep [hidden email]
======================================
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Edward R Cole

Re: 2nd RX

In reply to this post by k0wa@swbell.net

Other applications using the 2nd Rx with dual-Rx transverters:
1) Connecting one to a Vertical pol antenna and the other to a
Horizontal pol antenna (project I am working on)
2) Connect one to a high-gain yagi and the other to a
omni-directional antenna on VHF or UHF (very handy if you are Net
Control); In fact this could be used on HF for Nets.

Keeping thinking! I'm sure other uses can be dreamed up.

One of the BIG reasons I chose the K3 was that the sub-Rx is
identical to the main-Rx (making true diversity reception possible).

73, Ed - KL7UW

------------------------------

Message: 19
Date: Fri, 04 Mar 2011 18:55:48 +0000
From: G0AFH <[hidden email]>
Subject: Re: [Elecraft] 2nd RX
To: Elecraft Reflector <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

And another...

With a suitable dual rx 2m transverter and two arrays I can listen to
two directions at once. Very useful in contests.

73
Ian
G0AFH.

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep [hidden email]
======================================
______________________________________________________________
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