[Elecraft] K3 + SDRPlay's RSP1 as panadaptor

[Joe Subich, W4TV]

> 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
>>>>>
>>>>>