User's Manual

DANIELS
ELECTRONICS LTD.
TM
25W AM Power Amplifier Instruction Manual IM71-AMP3A130-25 1-1
1 GENERAL
1.1 Introduction
The AMP-3A130-25 provides the final stage of RF amplification and filtering for the AM amplifier
AMP-3A130-25, 118 - 138 MHz family. The amplifier covers 118 - 138 MHz with continuously
adjustable 10.0 to 25.0 W of output power.
The amplifier is packaged in the compact Eurostandard (5"h x 2.8"w x 7.5"d) housing, and is
robustly designed for mountain top or transportable applications. The amplifier modules use high
reliability components and each is accompanied with a complete operational test report on delivery.
1.2 Performance Specifications
Frequency: 118 to 138 MHz
Output Power: 10-25 Watts Continuous (set by VT-3A exciter)
Output Impedance: 50 Ω
Spurious & Harmonics: ≤ -80 dBc
Distortion ≤ 5% at 30% modulation
≤ 10% at 90% modulation @ 25ºC
Operating Voltage: +24 to 32 Vdc (28.0 Vdc Nominal)
Transmit Current: ≤ 3.0 A @ 25W
Standby Current: Mode 1 & 2: ≤ 2 mA (PTT or RF signal switched)
Mode 3: ≤ 200 mA (Continuous)
Load Mismatch Protection: 20:1 VSWR at all phase angles
Thermal Protection: Thermal interlock disables at 80
o
C (175
o
F)
Duty Cycle: 100%
Operating Temperature: -30
o
C to +60
o
C (-40
o
C to +60
o
C Optional)
Operating Humidity: Up to 95% R.H. @ 25
o
C
Front Panel Indicators: RF Power
High VSWR
Overload
Over Temperature
Exciter VT-3A130, 2.5W output for 25W
Industry Canada Approval: TBA
FCC Approval: TBA