Installation

Simple Installation Instructions: You should look at the following pictures before starting the installation. Clicking the picture will give you a larger view:
 

Tone Jumper Table

 Tone   1 2 3 4 5 6

  67.0  * . . . . .
  69.3  * . . * . .
  71.9  . * . . . .
  74.4  . . * . . .
  77.0  * * . . . .
  79.7  . . . * . .
  82.5  . * * . . .
  85.4  . . * * . .
  88.5  * * * . . .
  91.5  . . . . * .
  94.8  . * . * . .
 100.0  . . . . . .
 103.5  . * * * . .
 107.2  * * * * . .
 110.9  . * . . * .
 114.8  * * . . * .
 118.8  . * * . * .
 123.0  * * * . * .
 127.3  . * . * * .
 131.8  * * . * * .
 136.5  . * * * * .
 141.3  * * * * * .
 146.2  . * . . . *
 151.4  * * . . . *
 156.7  . * * . . *
 162.2  * * * . . *
 167.9  . * . * . *
 173.8  * * . * . *
 179.9  . * * * . *
 186.2  * * * * . *
 192.8  . * . . * *
 203.5  * * . . * *
 206.5  * . * . * *
 210.7  . * * . * *
 218.1  * * * . * *
 225.7  . * . * * *
 233.6  * * . * * *
 241.8  . * * * * *
 250.3  * * * * * *

 Tone   1 2 3 4 5 6

* Indicates that a solder jumper is installed, . indicates no jumper is present.

 
  1. It is easier to set the 3 tone frequencies before installing the TU-79PX in your transceiver. If you examine the TU-79PX board you will notice that there are 3 columns of 6 jumper pads. The left most column is for tone frequency 1 and the column is marked F1 at the top. Similarly, the middle group, F2, is tone group 2 and the right, F3, is tone 3. The solder jumpers are added by bridging the pads with a small ball of solder. The solder jumper may be removed by applying heat to the jumper pads and sucking the solder off with the supplied solder braid. You can determine which jumpers need to be installed by reviewing the Tone Table shown above. a * in the table indicates that the solder jumper is installed, a . indicates no jumper is present in the specified location. As shipped F1 = 85.4, F2 = 88.5 and F3 = 100.0 Hz. Notice, 100.0 Hz is selected when no solder jumpers are installed on any of the 6 solder jumper pads for a specific tone group.
  2. Remove the top and bottom covers from your radio.
  3. Install the 2 supplied standoffs in the existing holes directly behind the memory channel switch.
  4. Route the 7 wire cable bundle, connected to the TU-79PX, through the slot at the front of the radio so it exits to the bottom side of the transceiver. Plug this cable into jack J5 of the processor board located on the bottom of the radio. The red lead is located on the left side and is connected to the terminal marked 8T
  5.  
  6. Align the new TU-79PX with the previously installed standoffs and secure it with the 2 supplied mounting screws.
  7. Replace the covers.
  8. A tone is selected by pressing the Tone button, followed by the digit 1-3, or 0 if no tone is required, and finally the tone button is pressed again to revert back to the frequency display. One of the three tone frequencies can be associated with a memory channel by pressing the M key while in the Tone display with the select switch in the key position. Please refer to the TR-7930/7950 operators manual for further operational details.
  9. Play, lots, with your Tone Encoded TR-7950/7930.