RHR DXmate


Operate RHR stations with a straight key, iambic paddle, foot switch, headphones and microphone. The DXmate is a perfect fit for operators who want to add real equipment  to the WebDX/K3/0/10/100/ experience.






  1. RemoteHamRadio membership (sign up)
  2. DXmate device
  3. RHR Desktop app (install now)
  4. Install latest FTDI USB Drivers


Setup DXmate with RHR Desktop App.


Audio Setup

The DXmate has an integrated sound card that is separate from your computer’s internal sound card, for use with a headset, headphones, or microphone.

The 8-pin connector on the DXmate is compatible with microphones with the Elecraft or Kenwood pin configuration.

Screen Shot 2015-12-08 at 11.29.33 AM
Microphone jack, viewed from front of DXmate

  • Pin 1 – Microphone audio, low-Z (~600Ω)
  • Pin 2 – PTT
  • Pins 7 and 8 – Ground

Alternatively, you can connect a mono 3.5mm microphone into the MIC jack.

The PH 3.5mm jack is a stereo output for headphones.

Using a microphone with WebDX

  1. Connect to a station using WebDX.
  2. At the very right-hand side of the Chrome address bar, there will be a camera icon. Click the camera icon, then select the USB audio CODEC device as your microphone.Screen Shot 2015-12-08 at 11.34.48 AM
  3. Refresh the page for the change to take effect.
  4. The next time you power on a radio, your DXmate microphone will be used.

Using headphones with WebDX on a Mac

  1. Click the Apple menu at the top-left of your screen, then click System Preferences…
  2. Click the Sound icon, then the Output tab.
  3. Select the USB audio CODEC device for sound output.
  4. You may need to restart Chrome for this change to take effect.

Using headphones with WebDX on a Windows PC

  1. In the system tray of the taskbar, next to the clock, right-click the speaker icon and select Playback devices.
  2. Select the Speakers – USB audio CODEC option, then click Set default.
  3. You may need to restart Chrome for this change to take effect.

Digital Modes

Think of the DXmate as a “Radio”. The radio has a Mic input, a speaker out and a PTT. When you want to use digital modes with the DXmate you have to treat it the same way as you would a traditional radio. You will feed audio from your sound device to the mic input and you will take the audio form the headphones/speaker and feed that into your computer’s input for decoding. For PTT you have a couple of options.

1. If your external sound card device like a TimeWave Navigator or possibly a Signalink with built in VOX PTT will close the PTT line for TX.

2. Another option is configuring the software for CAT PTT. The digital software will send the K3 the serial command to place the transmitter into PTT.

We have made a number of JT65 contacts using the DXmate and a TimeWave Navigator sound card unit. The cable set for the TimeWave was the cable kit for the Elecraft K3/0-MINI.


Alternately, you can operate digital modes DIRECTLY with WebDX ONLY.

For the Mac check this article out.

For the PC check this article out.