Sailor RE2100, Technical Manual

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5 CIRCUIT DESCRIPTION AND SCHEMATIC DIAGRAMS RE2100
5.8 POWER UNIT (MODULE 8) PART NO. 625638
REGULATORS
The power module receives three vo9V, +18V, and -18V from the power supply placed in the
transmitter T2130. Seven regulators are converting these voltages to the different working voltages used
in the RE2100.
U01 and U02 d15V and -15V only to the exciter module. If the transmitter has not been used for
two minutes the microprocessor shuts down the regulators U01 and U02. This takes place via the shift
register U07-4 in the exciter module and the transistors Q01 and Q02. This is done to save power
consumption in the stand-by position. Regulator U06 is factory adjusted to deliver 5.25V output voltage.
RF AMPLIFIER AND FILTER
The transistors Q03, Q04, and Q05 form an RF amplifier to boost the exciter output to a level required
by the transmitter. The output level can be adjusted by means of R30. To reduce harmonics produced
in the exciter module a low pass filter is placed between Q03 and Q04. The RF output is a ready to send
signal.
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