User's Manual

POWER OPER.
METER
P
r
VD ALC
OFF STBY
BAND
AUTO
MAN’L
ON AIR
FAN
ID
P
ROT
P
f/kW
HF SOLID STATE LINEAR AMPLIFIER HL-
2500FX
MAN’L
1
.8
3.5
7
10
1
4
1
8/21
24/28
5
0
Pr/VD/ID/A
L
C
OUTPUT
HI
LO
ANT
A
B
ID
１１ Protection Circuit
If slight failure occur such as “over current”, for example, while working under OUT=Hi mode
(High output mode), the amp is not necessarily shut down, but enters into reduced power
operation mode
1.8MHz AUT-CIV ANT-A
ONAR Temp35C OUT_LoLIM
Protection LCD Sign Description Remarks
Sight Over Current
OUT: LoLim
Drain current (Id)
exceeded 55A for 60sec
When exceeding 70A, PROT shuts
down immediately
Slight Over Heat Heat sink temp. exceeded
75
℃
When exceeding 95
℃
,FAULT PROT
shuts down
Over Dissipation Total FET drain
dissipation exceeded
2,000W
If 2,000W exceeded, even reduced
power mode, PROT shuts down
Over Tj FET junction temp (Tj)
exceeded 190
℃
If Tj keeps 90
℃
, even with reduced
power mode, PROT shuts down
Sign Status
Following message displayed
Main DC P. Supply (Vdd)
）
Low Voltage Applied
AC Magnet Relay ON
RF path ON (Amplifying)
Output Setting) Lo
（
Low Vd
）
FAN, control circuit ON
Reset
Release PTT (to RX) once, and key (to
TX) again.
List of Protection
11-D Protection / Reduced Power
Operation