Elecraft KX2 and WSJT-X Easy Setup

Sometimes all we need is a little QRP transceiver, a weak signal mode and a good antenna. In comes the Elecraft KX-2, WSJT-X and a random wire. It can be used successfully in the field or at home (Ham Shack Portable). Although CW is preferred by many, you’ll find more opportunity to make short contacts (QSLs) using FT8. However, Morse code is more exciting because there’s conversation and more human interaction. The Elecraft KX2 is well suited for CW ops. I think it’s the best backpacking/SOTA HF transceiver around.

elecraft kx2 wsjt-x

Sabrent USB Sound Card

Elecraft KX2 WSJT-X

With the Elecraft KX2 transceiver I am using a Elecraft KXUSB serial cable, Sabrent USB Sound Card, two 3.5mm stereo male-male audio cables, an HP stream laptop running WSJT-X version 2.0.

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Sabrent USB Connections to KX2: Sabrent Mic In to Elecraft KX2 Phones. Sabrent Speaker Out to KX2 Mic In.

The antenna I am using inside the Ham Shack is a 80′ random wire with a 9:1 UNUN.

K0PIR Suggested KX2 Settings ( See Video Below):

Receiver and Transmitter
  • MODE: DATA A (WSJT-X will assist, but verify it is Data A mode and correct FIL width)
  • NB: OFF
  • NR: OFF
  • PRE: OFF
  • RF Gain: 0
  • FIL BW: 4 kHz
  • FIL Center: 1.5 kHz
  • AF: 2-10
  • AGC MD: OFF (See: How to Save Your Ears When AGC is OFF)
  • AGC LIM: 20
  • MIC GAIN: 0-50 (4 bars of ALC on transmit
  • PWR: 5 to 7 watts
  • MICBIAS: OFF ( may not be necessary to turn OFF)

My WSJT-X settings:

  • Rig: KX2
  • PTT: CAT
  • Mode: Data/Pkt
  • Split: Fake It

Elecraft KX2 Connections to HP Stream Laptop

Elecraft KX2 Settings for Digital Modes Data A Video

Thank you

More to come on WinKeyer 3 and RTTY FSK. Post your thoughts below in the comment section.

If you have any questions, comments or solutions, please comment below. I prefer the comment section here or in YouTube over e-mail because your comments and questions will help others as well.

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73,

Rich, K0PIR

Sources:

The Elecraft KX2 by Fred Cady – KE7X

Elecraft KX2 Owners Manual

How to Save Your Ears When AGC is OFF

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K0PIR

I'm an Amateur Radio enthusiast. I love the hobby and experimenting with radios, antennas and software. On my YouTube channel I upload videos on the Icom 7300 and Icom 7610 along with Ham radio software programs. I hope to inspire people to try new things in Amateur Radio.

4 Responses

  1. Tim Huffaker says:

    Did you add the IQ output to your Kx2? If so did you see any difference after the change? Have you used it on since the install.

  2. JUN DAI says:

    When I connect KX2 to my computer in digi mode, psk31 ,Olivia, WJST all work normal, the only thing I want is get the radio speaker noise back, I don’t know how to do it, I have Yeasu 818nd, in digital mode still can hear the speaker noise.any ideal?

    thanks!

    VE6DAI

  3. K0PIR says:

    Hi JUN,

    It’s nice to hear from you and thank you for posting here.

    Sense the speaker output from the radio is going into to your computer, you will have to enable the audio in the computer. Go into the USB Audio CODEC microphone setting,Listen Tab, and check off “Listen to this device.”

    I believe that should do it. Thank you again and best 73! Stay safe.

    Rich, K0PIR

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