DX Engineering DXE-KEYLINE-3 Instructions manual

DX Engineering

Key Line Splitter

DXE-KEYLINE-3

DXE-KEYLINE-3-INS Revision 0c

© DX Engineering 2021

1200 Southeast Ave - Tallmadge, OH 44278 USA

Phone: [phone] ∙ Tech Support and International: [phone]

Fax: [phone] ∙ E-mail: [e-mail]

Introduction

DX Engineering Transceiver Key Line Splitter DXE-KEYLINE-3 – a handy gadget designed to be
connected to the 'Ground-On-Transmit' amplifier keying line of a transceiver. This single-input,
triple-output passive DC only unit provides multiple PTT keying lines, two for other accessories in
addition to one for the amplifier. All four connectors are female RCA phono.

Many special Amateur Radio devices, from receive accessories, to simple phasing units and even
automatic antenna switches need to use the same T/R keying line as your amplifier. But they don't
have a keying line pass-through for the amplifier.

The DXE-KEYLINE-3 is specifically designed for your radio's amp keying output, allowing more
than just an amplifier to switch when your transceiver goes to transmit. Each center-positive keying
output of this device is protected with a separate 45V 2A Schottky diode, providing isolation
between each accessory keying line. Therefore, this splitter will keep the load or voltage of any one
device from affecting the others.

The DXE-KEYLINE-3 input depends upon the voltage and current rating of your transceiver's
transistor or relay amplifier keying circuit, so refer to your transceiver manual for the total that it
will safely handle. Most accessory keying lines send 13.8 Vdc at only a few milliamps, so this
combination typically works without issue. The DXE- KEYLINE-3 is passive, meaning that it
requires no power to function.

Features

 Works with most transceivers
 Allow multiple items to be connected to a transceiver’s T/R or Send line
 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.

- 1 -