R1
R2
R3
INPUT
V_SUPPLY
+
R8
VCE
F1
C1
Q1
Q2
R4
R5
R7
R6
TL1
C8
L1
C15
+
B1
C2
C3
L2
B2
C4
C7
L3
C9
DUT
C16
L4
C11
TL4
+
C5
C15 TL5
C12
C10
C13
C14
C6
OUTPUT
TL2
TL3
0.685″
B1, B2
C1
C2, C5
C3, C6
C4, C7
C8, C15
C9, C10
C11
C12, C13, C14
C15, C16
F1
L1, L2
L3
L4
Q1
Q2
Short Ferrite Bead, Fair Rite (2743021447)
250 µF, 50 Vdc Electrolytic Capacitor
10 µF, 50 Vdc Electrolytic Capacitor
0.1 µF, Chip Capacitor
100 pF, Chip Capacitor
43 pF, 100 Mil Chip Capacitor
10 pF, Mini–Unelco
5 pF, Mini–Unelco
0.8–8.0 pF, Johanson Gigatrim
1000 pF, Chip Capacitor
1 A Micro–Fuse
10 Turns, 20 AWG, 0.150″ ID (10 Ω 1/2 W Resistor)
4 Turns, 16 AWG, 0.101″ ID
0.5″ 18 AWG Wire
MMBT2222ALT1, NPN Transistor
BD136, PNP Transistor
R1
R2
R3
R4
R5
R6
R7
R8
TL1, TL5
TL2
TL3
TL4
V_Supply
VCE
Board
390 Ω, 1/4 W
500 Ω Potentiometer, 1/4 W
7.5K Ω, 1/4 W
2 x 4.7K Ω, 1/4 W
56 Ω, 2 W
75 Ω, 1/4 W
4.7 Ω, 1/4 W
4 Ω, 10 W
50 Ω, Microstrip Transmission Line
Microstrip Transmission Line
Microstrip Transmission Line
Microstrip Transmission Line
+26 Vdc ±0.5 Vdc Due to Resistor Tolerance
+24 Vdc @ 0.5 A
0.030″ Glass–Teflon 2 oz. Cu, εr = 2.55
Figure 1. MRF858S Class A RF Test Fixture Schematic
MOTOROLA RF DEVICE DATA
MRF858S
3