[Elecraft] SDR on K3 IF to look for RFI

[Bob McGraw K4TAX]

The approach I've used is to use a couple of BNC to BNC jumpers and a 
BNC "T" connector.  Connect the RX OUT to one side of the "T".  Connect 
the RX IN to the other side of the "T" connector. Connect the  RSP2 to 
the other port on the "T" connector.  Then press the RX ANT on the 
radio.  This allows the radio to be active and the RSP2 at the same 
time.  All is protected when/if you transmit.

This gives a very wide bandwidth based on the front end of the K3 and is 
much wider than the K3 IF.

73

Bob, K4TAX

On 4/1/2019 9:22 AM, Jim Miller wrote:
> Now that 160 season is almost over and my antenna farm is doing good I'm
> going to start chasing RFI at my new QTH.
>
> I plan to use my RSP2Pro with HDSDR to do some time lapse recording to see
> when things come and go as a first step.
>
> To do this I plan to use my existing antennas and I'd like to avoid
> connecting and disconnecting my rig as much as possible.
>
> So I'd like to use the IF port of the K3s. That's currently passed to the
> P3 and I thought I could use its IF output to drive the SDR.
>
> That would allow me to leave it connected all the time even while using the
> K3 for normal use.
>
> How wide is the bandwidth of that port? Is it limited to the 200Khz the P3
> presents?
>
> Thanks
>
> Jim ab3cv
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