No! The KX3 has I&Q analog data coming out of the side of the radio already. All that is needed is to feed an external sound card that data, and then, tell Win4K3 what the spectrum source is, pretty straight forward. I find the KX3 setup easier and less complex than the K3. With the K3, you need either a SDRPlay or a LP Pan to baseband the IF and develop the I&Q analog data needed. Wayne essentially designed that in the KX3.

73,
Barry
K3NDM

------ Original Message ------
From: "Dave Scarfe" <dave.sca...@gmail.com>
To: barrylaz...@gmail.com
Cc: elecraft@mailman.qth.net
Sent: 10/30/2018 9:51:42 AM
Subject: Re: [Elecraft] K3 Win4k3Suite Question

Does not require an SDR, like an SDRPlay?

73,
de VE5UO

On Tue, Oct 30, 2018 at 7:33 AM Barry <barrylaz...@gmail.com> wrote:

Terry,
     All you should need is a connection to the computers com port.
Win4K3 know which radio and just works. The connection should be the
data connection, but you will need a compatible connection on the
computer or an adapter if you only have USB connections on the computer side. Just make sure you can tell Win4K3 what com port you are using for
the radio just as you did for the KX3.

BTW: I started out with the KX3 and moved up as you are doing. There were no compatibility issues. Good luck and have fun. If you really run
into a problem, Tom usually pops up and helps; he monitors this
reflector.

73,
Barry
K3NDM

------ Original Message ------
From: "Terry" <n...@comcast.net>
To: elecraft@mailman.qth.net
Sent: 10/30/2018 1:07:06 AM
Subject: [Elecraft] K3 Win4k3Suite Question

>I am looking to purchase a preowned K3.  I currently own a KX3 that I
>have
>interfaced to Win4K3Suite.
>
>The K3 that I am considering buying has the two 9 pin Din plugs in the
>back,
>one ACC and one DATA.
>
>I am not financially able to purchase a P3 currently and want to use
>the
>spectrum scope on the Win4K3Suite to do that for me.
>
>What do I need to have to be able to interface the K3 to Win4K3Suite in
>order to get the spectrum scope to work.
>
>Thanks and 73's,
>
>Terry, N7TB
>
>
>
>--
>Sent from: http://elecraft.365791.n2.nabble.com/
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