RF Linear Amplifier PCB Assembly Manual
SkyWave DX600 Revision-B
Last Revised - 2/5/2021 9:10 AM
Page 56 of 57
Specifications
Parameter
Value
Conditions/Notes
Operating Modes
AM, FM, SSB
-
Voltage Requirements
+48V
DC
Typical
+55V
DC
Maximum
DC Current
18A
Maximum
RF Input Power
500mW
Minimum to Engage Relay
25W PEP
MAXIMUM
EXCEEDING MAXIMUM VALUE CAN
DAMAGE OUTPUT POWER
TRANSISTORS
RF Power Output
625W Maximum
-
2nd Harmonic
-48dBc
***
Typical
300W CW@28MHz
3rd Harmonic
-50dBc Typical
300W CW@28MHz
Input / Output Impedance
†††
50-Ohms Typical
-
Input SWR
‡‡‡
1.2:1 Typical
-
Power Gain
16dB Typical
@28MHz
Characterized Bandwidth
26-30MHz
0.5dB Gain Flatness
Class-AB Bias Drain Current
(Temperature Tracking)
400mA +/-25mA
-20
◦
C to +100
◦
C Heat Sink Temperature
Fuse
25A
ATO - Automotive Type
SSB Relay Dropout Delay
1.0 Second Typical
S2 Closed
Stand-By Power
250mW Typical
-
Reverse Voltage Protection
Continuous
No Damage to Amplifier or Fuse
Printed Circuit Board
Premium FR4
Solder Mask & Silkscreen
*** Decibels below carrier.
†††
An antenna system with an SWR of 1.5:1 or less is critical for optimal amplifier operation.
‡‡‡
Standing Wave Ratio.
