User's Manual

When the Repeater is used with an unregulated power supply, wide fluctuations in voltage and large AC
ripple content are common. Both must be removed for proper operation. This is effected by the internal
voltage regulator. The internal regulator does, however, generate heat which limits the maximum current
which can be passed through the regulator and to the transmitter power amplifier. This in turn limits the
maximum output power to 2 watts even if the power supply is capable of the required current. To use the
internal regulator, R378 should be installed. This is the normal configuration of the Repeater as set at the
factory and is the configuration for use with the RITRON RPS-1A power supply.
If a regulated power supply is used, the internal regulator may be bypassed to allow higher current
operation and thus greater output power to 5 watts. To effect this change, move the resistor in the R378
pad pair to R381 which is next to it. Note that a regulated supply can be used with the Repeater set for
internal regulation, but the maximum RF output power is still limited to 2 watts.