Specifications - Kenwood TR-7625 Service Manual

3SK74
TR-7625
SPECIFICATIONS
Application
VHF RF Amplifier {Mixer}
Construction
N-Channel * MOS FET (Dual Gate)
Drain + Source Voltage
Vosx 20V
Gate 1» Source Voltage
Veis +10V
Gate 2 + Source Voltage
Veos +10V
Drain Current
25 mA
Allowable Loss
200 mw
Channel Temperature
125°C
Storage Temperature
Maximum Specifications
—5.6 ~ +125°C
Item
Condition
Drain » Source Voltage
Vois= — 3V, Vo2s= 3V, lo= 500nA
Orain Current
Vos= 6V, Vois= 0, Vo2zs=3V
Cut-Off Voltage (Gate 1)
Vos= 6V, Va2s=0. to= 500nA
Cut-Off Voltage (Gate 2)
Vos= 6V. Ve1s=0, lo= 500nA
Gate Leak Current (Gate 1)
Vos=0, Vois=+10V, Vais=0
Gate Leak Current (Gate 2)
Vos=0. Vois=0, Vezs= + 10V
Smail Signal Transfer Admittance
Vos=6V. Vo2s= 3V, 1o=10mA, f= 1 0 kHz
Smali Signat Input Capacity
Vos= 6V. Vc2s = 3V, jlo= 10mA, f= 1.0 MHz
Small Signai Output Capacity
Vos=6V. Vozs= 3V, lo=10mA, f= 1.0 MHz
Small Signal Feedback Capacity
Vos= BV. Vaas=3V, lo= 10mA. f= 1.0 MHz
Output Power Gain
Voo= 10V, lo= 10mA, f= 200 MHz
Noise Figure
Item Symbol
Voo= 10V, lo= 10mA, f= 200 MHz
Maximum Rating of M57712H
(TA = 25°C. unless otherwise noted)
Condition
Operating
Voltage
oc
Current
Operating
Temperature
—30~ +110
Storage
—40~ +110 °C
Electrical Characteristic of M57712H
(TA = 25°C unless otherwise noted)
Condition
Output
Power
f= 144~ 148 MHz, Vec= 12V
Pin=0.15W, Z6=Zt= 500
Total
Efficiency
2nd
Harmonic
Radiation
Greater than
3rd Harmonic
Radiation
f=144~ 148 MHz, Vcc= 12V
Pin=0.15W, Zg=Zt= 500
f=144~ 148 MHz, Vec=12V
Pin=0.15W, Z6=Zi= 502
f= 144~ 148 MHz, Vcc= 12V
Pin=0.15W, Za=ZL= 500
f= 144~ 148 MHz, Vcc=12V
' | Pin=0.15W, Z6=Z.= 502
f= 144~ 148 MHz, Vec= 12V
Pin=0.15W, Zo =ZL= 502
Impedance
Note
GATE 2
DRAIN
SOURCE
Fig. 7 3SK74 Outline
APpwn>
Input Terminal (RFI)
Power Supply of Drive Stage (DRB)
Power Supply of Output Stage (F1B)
Output Terminal (RFQ)
GND
Fig. 8 M57712H Outline