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Wiring the TM-1 Mic Adapter
154 Hillview Drive Grants Pass, Oregon 97527 (541) 474-6700 Fax: (541) 474-6703
Introduction: The TM-1 Mic Adapter Kit was created to simplify attaching the TigerTrak to a mobile radio for tracking
applications. The adapter provides a convenient way to connect to the various mic lines without the need to cut or splice any
existing wiring. The Mic Adapter is simply inserted in-line between the radio and the microphone. Inside the adapter there are a
series of jumper terminals that allow you to bridge the appropriate mic lines over to the TM-1 connector. Although this process is
simple in theory, it is extremely easy to make an error that could have disastrous consequences! These instructions include a
worksheet to guide you through the process. It is important that you read this document thoroughly before beginning and then
follow the instructions exactly to insure success. These instructions will take you through the following steps:
1. Assemble the Mic Adapter printed circuit board.
2. Verify the radio’s microphone connector pin-out using a multimeter.
3. Make a table showing the correct pin-out of the microphone connector.
4. Complete the jumper wire diagram showing how to install the jumpers.
5. Install the appropriate jumpers on the Mic Adapter circuit board.
WARNING: Incorrect wiring could destroy both the TM-1 and your radio equipment! If after reviewing this document, you are
not absolutely certain that you are technically qualified to proceed, we recommend that you obtain the assistance of an experienced
technician. Tigertronics assumes no responsibility for the use or misuse of this adapter. This document is intended only to provide
basic guidelines to a qualified technician. It is the sole responsibility of the user to insure proper wiring.
Assembling The PCB: Assembly and soldering of the Mic Adapter circuit board is very straightforward. It is a simple matter of
inserting the parts into the board as shown in the pictures below and carefully soldering all the pins. The only caution we might
make is to be sure that each component is held tight against the board before you solder. It might be a good idea to solder just one
or two pins and then double check the positioning of the part before soldering the remainder. It is extremely difficult to reposition a
part after it is completely soldered, so take your time and double check your work! Be sure to index the round connector correctly.
Check the connector pin numbers and index notch against the pin numbers and index printed on the board.
Interface Cable: The next step in assembling the Mic Adapter Kit is the wiring of the Interface Cable. This is the cable that
connects your radio to the Mic Adapter board. The reason that we want to wire this first is that it provides a useful tool for figuring
out the microphone wiring in the steps that follow. We have provided a short length of eight conductor cable in the kit. The cable
already has the RJ-45 connector installed on one end, so you will only need to install the 8-pin round connector on the other. It is
best to make this cable as short as possible, so trim it’s length appropriately for the distance that you plan to locate the Mic Adapter
from your radio. In wiring the connector, Pin #8 (center pin) is always the most difficult to solder, so we would recommend that
you wire the connector pins in sequence starting with Pin #8 (reverse order). Be very careful not to fray any wires as they can
cause pins to short when the cable is flexed. It would be best to use “heat shrink” or insulating tubing on the pins, if it is available.
Wire the connector according to the wire colors as shown in the diagram below.
Grants Pass, Oregon