POWER SUPPLY PP-3990/FRC-93
a.c. power source, suitable antenna, microphone, and
key), and operated as a portable station. A small
The PP-3990/FRC-93 (Collins PM-2) is a lightweight
speaker is included in this power supply. Adequate
a.c. power supply. It is part of a complete high-
space is provided in the Collins CC-2 for small
frequency, single sideband station in a suitcase-sized
carrying case. The complete station consists of the
7-2. Tabulated Data
Collins KWM-2/2A, the PP-3990/ FRC-93 and Case,
110 or 220 volts, 50 to 400 Hz,
Electrical Equipment CY-6197/ GRC-159 (Collins CC-
4 or 2 amperes.
2) (fig. 7-1). The power supply converts 110- or 220-
volt a.c. power to suitable voltage and current values
6,0 to 6.3 volts a.c. at 11 amperes.
for operation of the Collins KWM-2/2A. It clamps to
Low voltage B+
275 volts at 175 ma. 260 volts at 210 ma.
the rear of the Collins KWM-2/2A so that both
High voltage B+
700 volts at 230 ma (key down
transceiver and power supply may be packed in the
-50 to -90 volts, no current
lightweight carrying case for portability.
assembled combination may be lifted together from the
Collins CC-2, set on a desk or table (connected to an
Figure 7-1. PP-3990/FRC-93 packed in (Collins CC-2) carrying case