SD2931-10_03 ST Microelectronics, Inc., SD2931-10_03 Datasheet - Page 8

• Manufacturer Part Number: SD2931-10_03
• Description: RF Power Transistors Hf/vhf/uhf N-channel Mosfets
• Manufacturer: ST Microelectronics, Inc.

Test circuit
6
8/16
Figure 14. 175 MHz test circuit schematic (production test circuit)
Note: All dimensions in inches
Test circuit
Table 8.
Component
C3, C8, C9
FB2, FB3
C1, C11
R1, R3
PCB
FB1
FB4
R2
R4
R5
C2
C4
T1
T2
L1
Component part list
1/4 wave choke, 50 ohm semi-rigid coax .141 OD 12” Long
1:4 transformer, 25 ohm semi-rigid coax .141 OD 6” long
0.62” woven fiberglass, 1 oz. copper, 2 sides, εr = 2.55
4:1 transformer, 25 ohm flexible coax .090 OD 6” long
Toroid X 2, 0.5” OD .312” ID 850µ 2 turns
Shield bead, 1” OD 0.5” ID 850µ 3 turns
20 Kohm 10 turn potentiometer
470 ohm 1 W chip resistor
360 ohm 1/2 W resistor
560 ohm 1 W resistor
470 pF ATC chip cap
Arco 423, 16-100 pF
43 pF ATC chip cap
Arco 404, 12-65 pF
Description
VK200
REF. 1021579C
SD2931-10