Page_0: "              MODEL T-4 Transmitter

1-Remove unit from service before making any frequency adjustments.

2-All frequency adjustments are calculated by adjusting the air capacitor using the adjustment screw at the base of the unit. This makes the parallel plates which almost make contact with one another have more or less area in proximity to each other, affecting the capacitive reactance of the air capacitor. Use Karras' formula of capacitive reactance divided by the resistance value set at the factory to determine the transmission frequency.

3-IMPORTANT- Before inserting or removing the unit, always connect the discharge rod to the two nodes, making sure the flat switch is disengaged. This will prevent stored charges which sometimes build up in the circuitry from grounding out on the connecting pins of the unit while removing it or inserting it"
Page_1: "into the socket.

4-CAUTION!!! NEVER connect the DISCHARGE ROD to the unit while it is operating!!! This will lead to a rapid thermal runaway which will quickly burn out the unit!!

5-For further queries, please contact the manufacturer or your service technician."