K3 + SDRPlay's RSP1 as panadaptor

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K3 + SDRPlay's RSP1 as panadaptor

TL_Netvision
Hello all,

I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
software to start with.
Can someone point me in the right direction for the whole procedure?

TIA
Isaac, 4Z1TL


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Re: K3 + SDRPlay's RSP1 as panadaptor

David Box-2
I would recommend that you use Win4K3Suite, really does a nice job of
integrating the RSP and K3.

No relationship with Win4K3Suite, just a satisfied user.

de Dave K5MWR


On 11/8/2018 8:22 AM, TL_Netvision wrote:

> Hello all,
>
> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
> software to start with.
> Can someone point me in the right direction for the whole procedure?
>
> TIA
> Isaac, 4Z1TL
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>
>

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Re: K3 + SDRPlay's RSP1 as panadaptor

John Simmons
In reply to this post by TL_Netvision
Isaac,

I did exactly that, using the HDSDR software. I used the RX ANT output
(must activate it from the front panel of the K3) to feed the antenna of
the RSP1. You use a BNC tee to feed the antenna back into the K3.
Purists use an RF splitter instead of a tee. I have a YouTube video that
shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE

If you need further help, let me know.

73,
-John NI0K
TL_Netvision wrote on 11/8/2018 8:22 AM:

> Hello all,
>
> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
> software to start with.
> Can someone point me in the right direction for the whole procedure?
>
> TIA
> Isaac, 4Z1TL
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

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Re: K3 + SDRPlay's RSP1 as panadaptor

Bob McGraw - K4TAX
I used HDSDR software and a BNC T  and a couple of short coax jumpers
from the RX ANT output back into the RX input.   Activate the feature
from the front panel of the K3S.    The input impedance of the RSP-1 
SDR is well above 50 ohms and thus I didn't observe any loading or loss
of the received signal.

As to software, HDSDR was my favorite and easy to setup and use. I added
OmniRig to allow for full interface to the K3S.  This provides two way
communications between the radio and computer. Thus any change on the
radio is effected the same on the computer and any change on the
computer is resolved on the radio.  Of course there is capability in the
HDSDR software to have your choice of the radio following the computer
or the computer following the radio or neither, thus both being
independent.

An excellent and economical approach which I used several years and with
different radios as well.   That is......until I purchased a P3 to go
with my K3S.

73

Bob, K4TAX


On 11/8/2018 9:19 AM, John Simmons wrote:

> Isaac,
>
> I did exactly that, using the HDSDR software. I used the RX ANT output
> (must activate it from the front panel of the K3) to feed the antenna
> of the RSP1. You use a BNC tee to feed the antenna back into the K3.
> Purists use an RF splitter instead of a tee. I have a YouTube video
> that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>
> If you need further help, let me know.
>
> 73,
> -John NI0K
> TL_Netvision wrote on 11/8/2018 8:22 AM:
>> Hello all,
>>
>> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
>> software to start with.
>> Can someone point me in the right direction for the whole procedure?
>>
>> TIA
>> Isaac, 4Z1TL
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> 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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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>


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Re: K3 + SDRPlay's RSP1 as panadaptor

WW3S
In reply to this post by John Simmons
Can you use one of the less expensive sdr dongles in a similar way?

Sent from my iPad

> On Nov 8, 2018, at 10:19 AM, John Simmons <[hidden email]> wrote:
>
> Isaac,
>
> I did exactly that, using the HDSDR software. I used the RX ANT output (must activate it from the front panel of the K3) to feed the antenna of the RSP1. You use a BNC tee to feed the antenna back into the K3. Purists use an RF splitter instead of a tee. I have a YouTube video that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>
> If you need further help, let me know.
>
> 73,
> -John NI0K
> TL_Netvision wrote on 11/8/2018 8:22 AM:
>> Hello all,
>>
>> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
>> software to start with.
>> Can someone point me in the right direction for the whole procedure?
>>
>> TIA
>> Isaac, 4Z1TL
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
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> 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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Re: K3 + SDRPlay's RSP1 as panadaptor

John Simmons
I suppose, but I've not tried it. The cheapo dongles don't cover HF, though.

-J

WW3S wrote on 11/8/2018 9:57 AM:

> Can you use one of the less expensive sdr dongles in a similar way?
>
> Sent from my iPad
>
>> On Nov 8, 2018, at 10:19 AM, John Simmons <[hidden email]> wrote:
>>
>> Isaac,
>>
>> I did exactly that, using the HDSDR software. I used the RX ANT output (must activate it from the front panel of the K3) to feed the antenna of the RSP1. You use a BNC tee to feed the antenna back into the K3. Purists use an RF splitter instead of a tee. I have a YouTube video that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>>
>> If you need further help, let me know.
>>
>> 73,
>> -John NI0K
>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>> Hello all,
>>>
>>> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
>>> software to start with.
>>> Can someone point me in the right direction for the whole procedure?
>>>
>>> TIA
>>> Isaac, 4Z1TL
>>>
>>>
>>> ---
>>> This email has been checked for viruses by Avast antivirus software.
>>> https://www.avast.com/antivirus
>>>
>>> ______________________________________________________________
>>> 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
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]

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Re: K3 + SDRPlay's RSP1 as panadaptor

Bob McGraw - K4TAX
In reply to this post by WW3S
If it will tune to the IF frequency of about 8.2 MHz.  From experience,
without an up conversion added, they won't tune that low.

73

Bob, K4TAX


On 11/8/2018 9:57 AM, WW3S wrote:

> Can you use one of the less expensive sdr dongles in a similar way?
>
> Sent from my iPad
>
>> On Nov 8, 2018, at 10:19 AM, John Simmons <[hidden email]> wrote:
>>
>> Isaac,
>>
>> I did exactly that, using the HDSDR software. I used the RX ANT output (must activate it from the front panel of the K3) to feed the antenna of the RSP1. You use a BNC tee to feed the antenna back into the K3. Purists use an RF splitter instead of a tee. I have a YouTube video that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>>
>> If you need further help, let me know.
>>
>> 73,
>> -John NI0K
>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>> Hello all,
>>>
>>> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
>>> software to start with.
>>> Can someone point me in the right direction for the whole procedure?
>>>
>>> TIA
>>> Isaac, 4Z1TL
>>>
>>>
>>> ---
>>> This email has been checked for viruses by Avast antivirus software.
>>> https://www.avast.com/antivirus
>>>
>>> ______________________________________________________________
>>> 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
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
> ______________________________________________________________
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>
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Re: K3 + SDRPlay's RSP1 as panadaptor

Ken K6MR
The RTL-SDR has a direct sampling mode that will do HF.  $30 is about as cheap as it gets.  Not as good as a real P3 but it does work.



Ken K6MR



________________________________
From: [hidden email] <[hidden email]> on behalf of Bob McGraw K4TAX <[hidden email]>
Sent: Thursday, November 8, 2018 8:14:30 AM
To: [hidden email]
Subject: Re: [Elecraft] K3 + SDRPlay's RSP1 as panadaptor

If it will tune to the IF frequency of about 8.2 MHz.  From experience,
without an up conversion added, they won't tune that low.

73

Bob, K4TAX


On 11/8/2018 9:57 AM, WW3S wrote:

> Can you use one of the less expensive sdr dongles in a similar way?
>
> Sent from my iPad
>
>> On Nov 8, 2018, at 10:19 AM, John Simmons <[hidden email]> wrote:
>>
>> Isaac,
>>
>> I did exactly that, using the HDSDR software. I used the RX ANT output (must activate it from the front panel of the K3) to feed the antenna of the RSP1. You use a BNC tee to feed the antenna back into the K3. Purists use an RF splitter instead of a tee. I have a YouTube video that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>>
>> If you need further help, let me know.
>>
>> 73,
>> -John NI0K
>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>> Hello all,
>>>
>>> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
>>> software to start with.
>>> Can someone point me in the right direction for the whole procedure?
>>>
>>> TIA
>>> Isaac, 4Z1TL
>>>
>>>
>>> ---
>>> This email has been checked for viruses by Avast antivirus software.
>>> https://www.avast.com/antivirus
>>>
>>> ______________________________________________________________
>>> 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
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
> ______________________________________________________________
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>
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Re: K3 + SDRPlay's RSP1 as panadaptor

Doug Alspaugh
In reply to this post by Bob McGraw - K4TAX
Thanks for the idea. Works great and got me away from the problems using
the IF out.

73 Doug N3QW


On 11/8/2018 10:53 AM, Bob McGraw K4TAX wrote:

> I used HDSDR software and a BNC T  and a couple of short coax jumpers
> from the RX ANT output back into the RX input.   Activate the feature
> from the front panel of the K3S.    The input impedance of the RSP-1 
> SDR is well above 50 ohms and thus I didn't observe any loading or
> loss of the received signal.
>
> As to software, HDSDR was my favorite and easy to setup and use. I
> added OmniRig to allow for full interface to the K3S.  This provides
> two way communications between the radio and computer. Thus any change
> on the radio is effected the same on the computer and any change on
> the computer is resolved on the radio.  Of course there is capability
> in the HDSDR software to have your choice of the radio following the
> computer or the computer following the radio or neither, thus both
> being independent.
>
> An excellent and economical approach which I used several years and
> with different radios as well.   That is......until I purchased a P3
> to go with my K3S.
>
> 73
>
> Bob, K4TAX
>
>
> On 11/8/2018 9:19 AM, John Simmons wrote:
>> Isaac,
>>
>> I did exactly that, using the HDSDR software. I used the RX ANT
>> output (must activate it from the front panel of the K3) to feed the
>> antenna of the RSP1. You use a BNC tee to feed the antenna back into
>> the K3. Purists use an RF splitter instead of a tee. I have a YouTube
>> video that shows the results:
>> https://www.youtube.com/watch?v=KusmkeLdfwE
>>
>> If you need further help, let me know.
>>
>> 73,
>> -John NI0K
>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>> Hello all,
>>>
>>> I am considering using an RSP1 SDR with my K3. I will probably use
>>> HDSDR
>>> software to start with.
>>> Can someone point me in the right direction for the whole procedure?
>>>
>>> TIA
>>> Isaac, 4Z1TL
>>>
>>>
>>> ---
>>> This email has been checked for viruses by Avast antivirus software.
>>> https://www.avast.com/antivirus
>>>
>>> ______________________________________________________________
>>> 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
>>> Message delivered to [hidden email]
>>
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>>
>
>
> ______________________________________________________________
> Elecraft mailing list
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> Post: mailto:[hidden email]
>
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Re: K3 + SDRPlay's RSP1 as panadaptor

Bob McGraw - K4TAX
Yes and it gives you a much wider RF spectrum.  It is protected when you
transmit thus no switching or muting is needed.  I've used it both ways 
and found with the IF output signal to the SDR that the sidebands were
inverted.  Thus a LSB signal appears as above the carrier while a USB
signal appears below the carrier. Also it makes for a nice 2nd receiver
with good detected audio for most all modes.

There are many other software applications for the SDR receivers.   Most
are FREE which is the better part while some get really sophisticated in
their implementation and features.      As to how they interface with
various logging applications, I don't have a clue.

Glad to be of assistance.

73

Bob, K4TAX


On 11/8/2018 2:44 PM, Doug wrote:

> Thanks for the idea. Works great and got me away from the problems
> using the IF out.
>
> 73 Doug N3QW
>
>
> On 11/8/2018 10:53 AM, Bob McGraw K4TAX wrote:
>> I used HDSDR software and a BNC T  and a couple of short coax jumpers
>> from the RX ANT output back into the RX input.   Activate the feature
>> from the front panel of the K3S.    The input impedance of the RSP-1 
>> SDR is well above 50 ohms and thus I didn't observe any loading or
>> loss of the received signal.
>>
>> As to software, HDSDR was my favorite and easy to setup and use. I
>> added OmniRig to allow for full interface to the K3S.  This provides
>> two way communications between the radio and computer. Thus any
>> change on the radio is effected the same on the computer and any
>> change on the computer is resolved on the radio.  Of course there is
>> capability in the HDSDR software to have your choice of the radio
>> following the computer or the computer following the radio or
>> neither, thus both being independent.
>>
>> An excellent and economical approach which I used several years and
>> with different radios as well.   That is......until I purchased a P3
>> to go with my K3S.
>>
>> 73
>>
>> Bob, K4TAX
>>
>>
>> On 11/8/2018 9:19 AM, John Simmons wrote:
>>> Isaac,
>>>
>>> I did exactly that, using the HDSDR software. I used the RX ANT
>>> output (must activate it from the front panel of the K3) to feed the
>>> antenna of the RSP1. You use a BNC tee to feed the antenna back into
>>> the K3. Purists use an RF splitter instead of a tee. I have a
>>> YouTube video that shows the results:
>>> https://www.youtube.com/watch?v=KusmkeLdfwE
>>>
>>> If you need further help, let me know.
>>>
>>> 73,
>>> -John NI0K
>>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>>> Hello all,
>>>>
>>>> I am considering using an RSP1 SDR with my K3. I will probably use
>>>> HDSDR
>>>> software to start with.
>>>> Can someone point me in the right direction for the whole procedure?
>>>>
>>>> TIA
>>>> Isaac, 4Z1TL
>>>>
>>>>
>>>> ---
>>>> This email has been checked for viruses by Avast antivirus software.
>>>> https://www.avast.com/antivirus
>>>>
>>>> ______________________________________________________________
>>>> 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
>>>> Message delivered to [hidden email]
>>>
>>> ______________________________________________________________
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Re: K3 + SDRPlay's RSP1 as panadaptor

Joe Subich, W4TV-4

> I've used it both ways and found with the IF output signal to the SDR
> that the sidebands were inverted.
Simple solution ... in HDSDR Options -> RF front-end frequency options
& Calibration, *check* "Mirror RF Spectrum in general", "Mirror RF
Spectrum for Tune >+ 30,000 KHz", "Operate CW in lower sideband (LSB)"
and "Swap CW and CWR for Omni-Rig"


73,

    ... Joe, W4TV


On 2018-11-08 5:15 PM, Bob McGraw K4TAX wrote:

> Yes and it gives you a much wider RF spectrum.  It is protected when you
> transmit thus no switching or muting is needed.  I've used it both ways
> and found with the IF output signal to the SDR that the sidebands were
> inverted.  Thus a LSB signal appears as above the carrier while a USB
> signal appears below the carrier. Also it makes for a nice 2nd receiver
> with good detected audio for most all modes.
>
> There are many other software applications for the SDR receivers.   Most
> are FREE which is the better part while some get really sophisticated in
> their implementation and features.      As to how they interface with
> various logging applications, I don't have a clue.
>
> Glad to be of assistance.
>
> 73
>
> Bob, K4TAX
>
>
> On 11/8/2018 2:44 PM, Doug wrote:
>> Thanks for the idea. Works great and got me away from the problems
>> using the IF out.
>>
>> 73 Doug N3QW
>>
>>
>> On 11/8/2018 10:53 AM, Bob McGraw K4TAX wrote:
>>> I used HDSDR software and a BNC T  and a couple of short coax jumpers
>>> from the RX ANT output back into the RX input.   Activate the feature
>>> from the front panel of the K3S.    The input impedance of the RSP-1
>>> SDR is well above 50 ohms and thus I didn't observe any loading or
>>> loss of the received signal.
>>>
>>> As to software, HDSDR was my favorite and easy to setup and use. I
>>> added OmniRig to allow for full interface to the K3S.  This provides
>>> two way communications between the radio and computer. Thus any
>>> change on the radio is effected the same on the computer and any
>>> change on the computer is resolved on the radio.  Of course there is
>>> capability in the HDSDR software to have your choice of the radio
>>> following the computer or the computer following the radio or
>>> neither, thus both being independent.
>>>
>>> An excellent and economical approach which I used several years and
>>> with different radios as well.   That is......until I purchased a P3
>>> to go with my K3S.
>>>
>>> 73
>>>
>>> Bob, K4TAX
>>>
>>>
>>> On 11/8/2018 9:19 AM, John Simmons wrote:
>>>> Isaac,
>>>>
>>>> I did exactly that, using the HDSDR software. I used the RX ANT
>>>> output (must activate it from the front panel of the K3) to feed the
>>>> antenna of the RSP1. You use a BNC tee to feed the antenna back into
>>>> the K3. Purists use an RF splitter instead of a tee. I have a
>>>> YouTube video that shows the results:
>>>> https://www.youtube.com/watch?v=KusmkeLdfwE
>>>>
>>>> If you need further help, let me know.
>>>>
>>>> 73,
>>>> -John NI0K
>>>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>>>> Hello all,
>>>>>
>>>>> I am considering using an RSP1 SDR with my K3. I will probably use
>>>>> HDSDR
>>>>> software to start with.
>>>>> Can someone point me in the right direction for the whole procedure?
>>>>>
>>>>> TIA
>>>>> Isaac, 4Z1TL
>>>>>
>>>>>
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Re: K3 + SDRPlay's RSP1 as panadaptor

Drew AF2Z
In reply to this post by John Simmons
I just got a RSP1A and am missing something here: if I connect my
receive antenna to the K3 RX In, then connect the K3 RX Out to the SDR,
what is the use of the tee?

73,
Drew
AF2Z




On 11/08/18 10:19, John Simmons wrote:

> Isaac,
>
> I did exactly that, using the HDSDR software. I used the RX ANT output
> (must activate it from the front panel of the K3) to feed the antenna of
> the RSP1. You use a BNC tee to feed the antenna back into the K3.
> Purists use an RF splitter instead of a tee. I have a YouTube video that
> shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>
> If you need further help, let me know.
>
> 73,
> -John NI0K
> TL_Netvision wrote on 11/8/2018 8:22 AM:
>> Hello all,
>>
>> I am considering using an RSP1 SDR with my K3. I will probably use HDSDR
>> software to start with.
>> Can someone point me in the right direction for the whole procedure?
>>
>> TIA
>> Isaac, 4Z1TL
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
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Re: K3 + SDRPlay's RSP1 as panadaptor

Richard Eversole
Allow other tools to look at RX out ?

-----Original Message-----
From: [hidden email] <[hidden email]> On
Behalf Of Drew AF2Z
Sent: Tuesday, November 13, 2018 2:42 PM
To: [hidden email]
Subject: Re: [Elecraft] K3 + SDRPlay's RSP1 as panadaptor

I just got a RSP1A and am missing something here: if I connect my receive
antenna to the K3 RX In, then connect the K3 RX Out to the SDR, what is the
use of the tee?

73,
Drew
AF2Z




On 11/08/18 10:19, John Simmons wrote:

> Isaac,
>
> I did exactly that, using the HDSDR software. I used the RX ANT output
> (must activate it from the front panel of the K3) to feed the antenna
> of the RSP1. You use a BNC tee to feed the antenna back into the K3.
> Purists use an RF splitter instead of a tee. I have a YouTube video
> that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>
> If you need further help, let me know.
>
> 73,
> -John NI0K
> TL_Netvision wrote on 11/8/2018 8:22 AM:
>> Hello all,
>>
>> I am considering using an RSP1 SDR with my K3. I will probably use
>> HDSDR software to start with.
>> Can someone point me in the right direction for the whole procedure?
>>
>> TIA
>> Isaac, 4Z1TL
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>> ______________________________________________________________
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Re: K3 + SDRPlay's RSP1 as panadaptor

Drew AF2Z
I figured it out...

I am using a separate receive only antenna: just connect it to RX IN,
then connect the SDR to RX OUT; no tee needed.

The tee version is for routing the K3 ANT1 and ANT2 (tx/rx antennas) to
the SDR.

73,
Drew
AF2Z



On 11/13/18 17:52, [hidden email] wrote:

> Allow other tools to look at RX out ?
>
> -----Original Message-----
> From: [hidden email] <[hidden email]> On
> Behalf Of Drew AF2Z
> Sent: Tuesday, November 13, 2018 2:42 PM
> To: [hidden email]
> Subject: Re: [Elecraft] K3 + SDRPlay's RSP1 as panadaptor
>
> I just got a RSP1A and am missing something here: if I connect my receive
> antenna to the K3 RX In, then connect the K3 RX Out to the SDR, what is the
> use of the tee?
>
> 73,
> Drew
> AF2Z
>
>
>
>
> On 11/08/18 10:19, John Simmons wrote:
>> Isaac,
>>
>> I did exactly that, using the HDSDR software. I used the RX ANT output
>> (must activate it from the front panel of the K3) to feed the antenna
>> of the RSP1. You use a BNC tee to feed the antenna back into the K3.
>> Purists use an RF splitter instead of a tee. I have a YouTube video
>> that shows the results: https://www.youtube.com/watch?v=KusmkeLdfwE
>>
>> If you need further help, let me know.
>>
>> 73,
>> -John NI0K
>> TL_Netvision wrote on 11/8/2018 8:22 AM:
>>> Hello all,
>>>
>>> I am considering using an RSP1 SDR with my K3. I will probably use
>>> HDSDR software to start with.
>>> Can someone point me in the right direction for the whole procedure?
>>>
>>> TIA
>>> Isaac, 4Z1TL
>>>
>>>
>>> ---
>>> This email has been checked for viruses by Avast antivirus software.
>>> https://www.avast.com/antivirus
>>>
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Re: K3 + SDRPlay's RSP1 as panadaptor

Don Wilhelm
In reply to this post by Drew AF2Z
Drew,

Your subject line indicates that you are using SDRPlay as a panadapter,
and in that case, you would want to connect it to the K3 IF OUT and tune
it to the K3 1st IF of 8.215 MHz.  The display will show you what is in
the K3 IF.

If instead you are using it as a sub-receiver, you would connect it to
the K3 RX IN and OUT, or use a separate RX antenna on SDRplay.

Two entirely different uses of SDRplay.

73,
Don W3FPR

On 11/13/2018 5:41 PM, Drew AF2Z wrote:
> I just got a RSP1A and am missing something here: if I connect my
> receive antenna to the K3 RX In, then connect the K3 RX Out to the SDR,
> what is the use of the tee?
>
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Re: K3 + SDRPlay's RSP1 as panadaptor

Richard Ferch-2
In reply to this post by TL_Netvision
Actually, Don, that is not the case. Depending on your software, you can
use the SDRplay as a panadapter using either IF or RF (RX Ant In/Out). I
use my SDRplay both ways. The software has to be told which connection you
are using in order to label frequencies correctly in the display, but they
both work and produce similar displays.

Likewise, you can use the SDRplay as a second (or third) receiver using
either feed method. Again, the SDR software has to know which connection
you are using in order to know what frequency to demodulate the audio from,
but there is software that will work either way.

One caveat with using an SDR using a separate RX antenna: you may need some
way to isolate the SDR from the antenna while you are transmitting, such as
an external TX/RX switch, or some kind of receiver protection circuit;
otherwise, the voltages induced on the receive antenna by your nearby
transmitted signal may be high enough to damage the SDR. That is not an
issue using either the RX Ant In/Out loop or the IF output from the K3; the
RX Ant loop is behind the K3's TX/RX switch (the isolation is not perfect,
but it is good enough to protect the SDR), and the IF Out level during
transmit is also too low to be a problem.

73,
Rich VE3KI


W3FPR wrote:

Your subject line indicates that you are using SDRPlay as a panadapter,
and in that case, you would want to connect it to the K3 IF OUT and tune
it to the K3 1st IF of 8.215 MHz.  The display will show you what is in
the K3 IF.

If instead you are using it as a sub-receiver, you would connect it to
the K3 RX IN and OUT, or use a separate RX antenna on SDRplay.
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Re: K3 + SDRPlay's RSP1 as panadaptor

Don Wilhelm
Please keep in mind that the RX IN/Out solution is after the K3/K3S Low
pass Filters.  So for instance if you want to monitor 15 meters while
listening to 40 meters, the signals will be greatly attenuated.

There will be no attenuation if you are listening to a band below the
frequency the K3 is tuned to.

There are compromises to every solution - rule of life as well as radios.

73,
Don W3FPR

On 11/13/2018 11:39 PM, Richard Ferch wrote:

> Actually, Don, that is not the case. Depending on your software, you can
> use the SDRplay as a panadapter using either IF or RF (RX Ant In/Out). I
> use my SDRplay both ways. The software has to be told which connection you
> are using in order to label frequencies correctly in the display, but they
> both work and produce similar displays.
>
> Likewise, you can use the SDRplay as a second (or third) receiver using
> either feed method. Again, the SDR software has to know which connection
> you are using in order to know what frequency to demodulate the audio from,
> but there is software that will work either way.
>
> One caveat with using an SDR using a separate RX antenna: you may need some
> way to isolate the SDR from the antenna while you are transmitting, such as
> an external TX/RX switch, or some kind of receiver protection circuit;
> otherwise, the voltages induced on the receive antenna by your nearby
> transmitted signal may be high enough to damage the SDR. That is not an
> issue using either the RX Ant In/Out loop or the IF output from the K3; the
> RX Ant loop is behind the K3's TX/RX switch (the isolation is not perfect,
> but it is good enough to protect the SDR), and the IF Out level during
> transmit is also too low to be a problem.
>
> 73,
> Rich VE3KI
>
>
> W3FPR wrote:
>
> Your subject line indicates that you are using SDRPlay as a panadapter,
> and in that case, you would want to connect it to the K3 IF OUT and tune
> it to the K3 1st IF of 8.215 MHz.  The display will show you what is in
> the K3 IF.
>
> If instead you are using it as a sub-receiver, you would connect it to
> the K3 RX IN and OUT, or use a separate RX antenna on SDRplay.
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