[Elecraft] Using external SDR and a K3 as antenna splitter

[Don Wilhelm]

Dave,

There in a block diagram in the back of the K3 manual.
The RX ANT OUT is what you are looking for - but remember that it has 
the Low Pass Filter in the path, so the response at frequencies higher 
than the band the K3 is tuned to will be attenuated.

If you need a direct antenna connection, you will have to use a splitter 
on the antenna and some means of protecting the SDR during K3 transmit.
Alternately, use a separate RX antenna on the SDR (you may still need 
protection for the SDR unless the TX antenna is located far enough from 
the RX antenna.

73,
Don W3FPR

On 11/18/2019 11:06 AM, Dave Cole wrote:
> A few years ago someone posted a method of using a splitter, and the 
> External Antenna jacks to feed an external SDR with the direct antenna, 
> not a IF, but a wideband signal from the primary antenna...
> 
> I think it was something along the lines of add a splitter, between the 
> RX Antenna in/out, and then picking off the antenna feed to the SDR from 
> an output of the splitter...   Does this make sense?
> 
> Is there a high level block diagram showing the antenna pathing for a 
> K3, with the ATU installed, and how the front panel switch labeled RX 
> ANT controls the signal path?
>