Data modes with the KX3

Following on from the Yaesu FT-817 data mode set up guide, this page will take you through the steps required to set up and configure the Elecraft KX3 for data mode communication. The configuration of the Elecraft KX3 is a little different, well use the Microphone and headphone sockets to connect to Signalink sound card.

Making this work is relatively simple, it takes a couple of minutes to set up in the field once you've connected this all up a couple of times. 

Why use the Tigertronics Signalink sound card? Well, for me it just works and it's easy to set up. I have used both internal and external standard PC sound cards for data modes, but these can be tricky to get working and can suffer from ground loops and fading along with other issues. I'd recommend the Signalink to keep things simple.

Before connecting up, do ensure that your SignaLink is is configured correctly, this will involve taking the unit apart. It should have come with clear instructions on how to do this, alternatively go to the Tigertronics website for help.

There are four socket head screws on the front of the unit to remove, this allows you access to the configuration socket. Configuration is no problem and should not be too difficult to do. New units are supplied with precut link wires which work just fine. Alternatively there are pre-configured adapters available which will slot right in and eliminates the need for link wires.

Connect your Signalink, PC and radio as follows:

• Received audio is connected to the Signalink via the headphone socket on the KX3.
• The Transmit audio and PTT is connected to the KX3 via the Microphone socket on the KX3.
• PTT is activated when audio data is sent via the Signalink (like VOX).
• Frequency control is via your KX3 CAT control lead 

Switch on the KX3  and check your settings as shown below:

Menu settings:

1. Mode set to: USB
2. Set power to: 5 Watts (to begin with)
3. Switch off all filters
4. Gain to 100%
5. Audio to 50%
6. Mic gain to 50%

Signalink:

1. Set all dials to 50%
2. Switch on

1. Adjust the RX knob on the Signalink so the waterfall displays good clear data streams. The Elecraft KX3 volume knob should have no effect.
2. When transmitting, adjust the TX knob on the Signalink so that the last ALC bar is just starting to flash (you may need to slightly move the Mic gain dial on the KX3 to show this). 
3. You may have to adjust the transmit levels regularly depending on frequency and power settings, so do keep an eye on this.
4. That's it. You should be ready to make a CQ call.