Elecraft K2/K3


Both the Elecraft K2 and K3 can be remote controlled from a PC with for example HamRadioDeLuxe or other softwares.

The most convinient way of controlling a K3 is with the K3-Twin concept


Elecraft K3 CAT preparations (mode=4)

When you want to control a Elecraft K3 with the RRC-1258MkII via their remote control protocol, you connect a standard RS-232 cable between the PC and the COM 2 connector on the back of the Control-RRC. From the Radio-RRC:s COM2 connector to the radios KIO3 Modules  RS-232 connector you use standard straight cable here also They are “off the shelf” cables.

The microphone can be connected direct to the Control-RRC AUX/MIC jack, if you have a mic with RJ-45 connector. If you have a microphone with a the circular connector which fit to the K3 front you can buy a adapter cable from the webshop or make it by your self.

Between the Radio-RRC AUX/MIC and the circular mic jack on the radio you need to make a adapter cable by your self or buy one from our Webshop. If  you make the cable by your self make it as as short as possible to prevent it from picking up HF.


The speaker is connected direct to the SP-jack on the front of the Control-RRC with a 3.5 mm stereo plugg.

The speaker signal from the Radios ext. speaker jack to the Radio-RRC SP jack is connected via a standard “off the shelf cable” with 3.5 mm stereo plugs in both ends.

To remote start the K3 you need to connect a cable from the RRC I/O connector to the K3-ACC connector ( check the Elecraft chapters in te users manual)

Attention! Always check the users manual for updated drawings before starting to make cables


Before connecting the cables to radio and control panel you need to do some strappings inside the RRC:s. For instructions of how to open the RRC:s see “Open the box / straps” page. Down below is the strappings that need to be done described.

If your microphone  needs a bias voltage put JMP1 in place.


If you  want to be able to Connect resp. Disconnect the SIP-connection via a Kenwood Microphone UP button you can add the grey strap in the control RRC. But don’t press the button when you are in QSO.


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