User Manual

84
5W VHF-III RMS AMPLIFIER MODULE MTF0118AR0
DESCRIPTION
The MTF0118A is the final stage of the 5W VHF RMS of the transmitter, based on MOS technology. It includes
the final stage itself (SCH0436A), its cooling heatsink, and an interface board (SCH0388B) which allows to control
the forward power, the reflect power, the Gain and the temperature. The final amplifier is provided with a GATE
control to inhibit the power output, a circuit to monitor the output and the needed circuits to read the output forward
and reflected power. The power reading is an RMS measurement.
TECHNICAL CHARACTERISTICS
Output Power 5W RMS
Frequency Range 170 - 230MHz
Gain 43dB ±0.5
Power Supply 28V ±2%
Total Quiescent Current (cold) 2.6A
Output Impedance 50Ω
Input Impedance 50Ω
Input Return Loss >15dB
MTF0118A COMPONENT LIST
Part Name Code Description Qty
00432 50Ω 60W TERMINAL RESISTOR 1
00664 LM35DT THERMAL SENSOR 1
01400 BYPASSING CAPACITOR 2
01403 BYPASSING CAPACITOR 5
02209B PANEL MOUNTING N SOCKET 1
02512 SMA SOCKET 1
02515 SMB SCREW cod. R114313000 1
03469 BLF1043.112 TRANSISTOR 2
04031A MRF363ALR5 LDMOS TRANSISTOR 1
04340 LM 317T VOLTAGE REGULATOR 1
07683 1.0mm SILVER WIRE 0.20
08502 RG 316 50Ω CABLE 0.10
C0171 AWG22 TEFLON CABLE 0.25
DET1026 DET1026R0 MECHANICAL DETAIL 2
DET1320R1P DET1320R1P MECHANICAL DETAIL 1
DET1330R2P DET1330R2P HEAT SINK MODULE 1
SCA0115 SCA0115R0 COVER 1
SCA0128R1B SCA0128R1B RF AMPLIFIER MODULE BOX 1
SCH0388BR1 POWER SUPPLY INTERFACE BOARD 1
SCH0436AR0 5W RMS VHF AMPLIFIER MODULE 1
V0771 3x5 MALE/FEMALE SPACER 4
TRANSISTOR NAME BIAS CURRENT
TR1 Pre-Driver BLF1043 0.4A
TR2 Driver BLF1043 0.6A
TR3 Output Stage MRF373 1.5A