DX Engineering DXE-3RIGKEYLINE Instructions manual

DX Engineering

Key Line Combiner

DXE-3RIGKEYLINE

DXE-3RIGKEYLINE-INS Revision 0a

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Introduction

The DX Engineering Key Line Combiner – DXE-3RIGKEYLINE can take the ground-on-transmit
amplifier keying lines from up to three transceivers or other devices and connect them to one
amplifier or accessory. It handles the PTT keying from three radios to one amplifier.

This device is handy when using Amateur Radio devices that need to “share” a T/R keying line and
don’t have a keying line pass-through. Each keying input or output is guarded with a separate 45V 2A
Schottky diode, providing ground-on-transmit isolation between each accessory keying line. The unit
keeps the load or voltage of any one piece of equipment from affecting the others. The voltage and
current handling depends upon the rating of the transceiver(s) transistor or relay amplifier keying
circuit. Check your transceiver’s manual for the total voltage and current that it will safely
handle. This devices handle keying lines only. Other connections and appropriate amplifier and
accessory operation must be considered. All four connectors are female RCA phono.

Features

 Works with most transceivers using ground-on-transmit keying
 Allow multiple transceivers or other gear to send the transmit key line to one amplifier
 Center Positive Keying
 Schottky diode protection between outputs
 Common RCA Phono connections
 Unit is passive - does not require power to operate

Manual Updates and Information

Every effort is made to supply the latest manual revision with each product. Occasionally a manual
will be updated between the time your DX Engineering product is shipped and when you receive it.
Please check the DX Engineering web site (www.dxengineering.com) for the latest revision manual.