With a push of a button you can listen:

  • Your own radio in both ears (MONO).
  • Your own audio on the right channel and monitored radio on the left channel.


This product is discontinued and can only be purchased by submitting a custom order.

Audio Box is used for sharing and recording audio from two radios.

Designed for CQ WW SSB contest 2014 by Sinisa YT1NT.

First samples are produced in SKY SAT Communication for contest purpose and modified for production.

This box is connected on radio’s low-level audio output.

It has own differential audio amplifier for driving headphones, and soft audio switching to switch own radio source and monitored radio source.

Additional information

Weight 2.5 kg
Dimensions 27 × 17 × 7 cm
Isolation on unused port at 30MHz:

56db to 70 dB (On/Off status)

Input Power:



PL or N type

Power voltage:

+ 12V DC

Power consumption:


Power Indication:

LED indication