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GHz Technology Inc. 3000 Oakmead Village Drive, Santa Clara, CA 95051-0808 Tel. 408 / 986-8031 Fax 408 / 986-8120
VAM 40
40 Watts, 27 Volts, Class AB
Defcom 100 - 150 MHz
GENERAL DESCRIPTION
The VAM 40 is a COMMON EMITTER, specifically designed for collector
modulated operation in the VHF AM applications in the 100-150 MHz range.
CASE OUTLINE
55HT, Style 2
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation @ 25 C 50 Watts
o
Maximum Voltage and Current
BVces Collector to Emiter Voltage 60 Volts
BVebo Emitter to Base Voltage 4.0 Volts
Ic Collector Current 5.0 A
Maximu m Temperatures
Storage Temperature - 65 to +150 C
o
Operating Junction Temperature +200 C
o
ELECTRICAL CHARACTERISTICS @ 25 C
O
SYMBOL CHARACTERISTICS TEST CONDITIONS MIN TYP MAX UNITS
Pout
Pin
Pg
Pout
Pin
Pg
ηc
VSWR
Power Output
Power Input
Power Gain
Power Output
Power Input
Power Gain
Efficiency
Load Mismatch Tolerance
F = 150 MHz
Vcc =27V, 1 KHz, 50%
F = 150 MHz
Vcc = 13.5 Volts
F = 150 MHz, Po=10 W
Vcc = 13.5 Volts
40
10
10
3.2
11
8.0
65
4.0
2.0
30:1
Watts
Watts
dB
Watts
Watts
dB
%
BVebo
BVces
BVceo
Ices
Cob
hFE
θjc
Emitter to Base Breakdown
Collector to Emitter Breakdo wn
Collector to Emitter Breakdo wn
Collector Leakage Current
Output Capacitance
DC - Current Gain
Thermal Resistance
Ie = 5 mA
Ic = 20 mA
Ie = 50 mA
Vce = 5 Volts
Vcb = 28 V, F = 1 MHz
Vce =5 V, Ic = 500 MA
4.0
60
32
10
30
25
100
3.5
Volts
Volts
Volts
mA
pF
C/W
o
Issue August 1996
VAM40
August 1996
VAM40
150 MHz TEST AMPLIFIER
C1
C2
L1
L2
C5
L4
C6 C7
L3
C3
C4
Vcc = +28 Volts
C1, C2 .......... 4-40 pf Elmenco type 403
C3, C4 .......... 2-25 pf Elmenco type 402
C5 .............. .001 mf
C6 .............. .1mf
C7 ................ 10 mf
L1 ................ 1/2 turn #16, 3/8" I.D.
L2 ................ 1/Ouf RFC
L3 ................ 3 turns #16, 3/8" I.D.
L4 ................ 6 turns #16, 3/8" I.D.
August 1996
