Instruction Manual
EJ-41U Terminal Node Controller Unit
Thank you for purchasing this fine Alinco product. This unit enables data communication when
it is properly installed in designated Alinco transceivers. Please read this manual, print the
contents if necessary, and keep this disk for future reference.
Since this device is capable of being used in commercial applications, some of the pages in this
manual are intentionally left blank to accommodate those uses in other regions.
Although we attempt to explain the features of this unit in a simple and comprehensive manner,
unless you have some knowledge about packet communications and APRS, you may have
difficulty understanding the contents of this manual. We apologize, but Alinco cannot provide
basic information of how packet and/or APRS works in general. Please consult your favorite
Ham radio
stores for books on the subject and/or web-sites that support your area of interest
regarding those communication modes. You can explore the exciting world of data
communication by yourself, and we believe that this is a most interesting part of the king of
hobbies, Amateur Radio.
APRS
®
is a registered trademark of Bob Bruninga, WB4APR
Notice
• This unit should be used with ALINCO transceiver DR-135T/E.
• The memory of all settings of the unit are retained by the built-in lithium battery. If they go back to the
default, the battery might be consumed. In that case consult the dealer.
Accessories
The accessories listed below are included. Check that all of them are found before using.
• EJ-41U • 3.5ø stereo plug (for GPS input terminal) • Velcro for installation
• Instruction Manual • Instruction Manual DISK version
Installation
1) Remove the bottom case of DR-135.
2) Attach Velcro on the VCO case.
3) Unplug W1 of DSUB-9 connector from CN107 and plug it into
CN1 connector of EJ-41U.
4) Plug W2 of EJ-41U to the transceiver connector CN107.
5) Attach Velcro on EJ-41U so that it matches to the other Velcro on the
VCO case. (Be careful that the lithium battery doesn’t mount
on the electric part.)
6) Install the bottom case after putting W1 neatly not to be caught in. (*1)
