Furuno RC-1800F Operator's Manual page 398

(7) Audio Output
(8) Standard Features
4. ANTENNA COUPLER
(1) Tuning System
(2) Frequency Range
(3) Input Impedance
(4) Antenna
(5) Tuning Power
(6) VSWR
(7) Tuning Time
(8) Dummy Load
(9) Power Source
5. POWER AMP UNIT (PA-2500)
(1) Input Power
(2) Output Power
(3) Input/Output Impedances
(4) Power Source
Internal speaker: 1 W/ 8 ohms
Line output: 0 dBm/ 600 ohms
Scan, Sweep, Noise Blanker, Voice-activated Squelch
CPU controlled fully automatic tuning system
1.6 MHz to 27.5 MHz
50 ohms (viewed from transceiver)
7 m to 30 m wire or whip antenna + wire
10 W
less than 1.5
within 2 to 15 seconds
within 0.5 seconds on pre-tuned bands
10 ohms + 250 pF mounted in the coupler
15 VDC: supplied from transceiver unit
60W
250W
50ohms
24 VDC, 30 A
SP - 3 E5632S01D