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Power amplifier board

NO.

Item

SPECS

PACKAGE

BRAND

MPN

Designator

1

Aluminum

solid cap

100uF

Würth

875105359010

C1B, C2B, C7B, C8B, C90B, C110B,

C113B

2

capacitor

100nF

0603

Murata

GRM188R71H104KA93

C3B, C4B, C5B, C6B, C40B, C45B,

C46B, C56B, C59B, C60B, C61B, C62B,

C66B, C67B, C68B, C69B, C70B, C73B,

C74B, C75B, C76B, C77B, C81B, C82B,

C83B, C84B, C87B, C97B, C98B,

C100B, C102B, C105B, C106B, C107B,

C109B, C111B, C114B, C115B, C120B,

C130B, C133B

3

capacitor

100pF

0805

Murata

GRM21A5C2D101JW01

C9B, C10B, C18B, C21B, C24B, C47B,

C49B, C55B

4

capacitor

1nF

0805

Murata

GRM21AR72D102KW01

C11B, C19B, C63B, C64B, C79B, C80B

5

capacitor

330pF

0805

Murata

GRM21A5C2D331JW01

C12B, C28B, C31B, C36B

6

capacitor

680pF

0805

Murata

GRM21A7U2D681JW31

C13B, C15B, C27B

7

capacitor

470pF

0805

Murata

GRM21A7U2D471JW31

C16B, C17B

8

capacitor

1.5nF

0805

Murata

GRM21AR72D152KW01

C20B

9

capacitor

1.2nF

0805

Murata

GRM21A7U2D122JW31

C22B, C23B

10

capacitor

47pF

0805

Murata

GRM21A5C2D470JW01

C25B, C32B

11

capacitor

75pF

0805

Murata

GQM2195C2E750GB12

C26B, C52B

12

capacitor

30pF

0805

Murata

GQM2195C2E300GB12

C29B

13

capacitor

150pF

0805

Murata

GRM21A5C2D151JW01

C30B

14

capacitor

27pF

0805

Murata

GRM21A5C2D270JW01

C33B, C50B, C139B

15

capacitor

100nF

0805

Murata

GRM21BR72A104MAC4

C34B

16

capacitor

68pF

0805

Murata

GRM21A5C2D680JW01

C35B, C54B

17

capacitor

120pF

0805

Murata

GRM21A5C2D121JW01

C38B, C53B

18

capacitor

220pF

0805

Murata

GRM21A5C2D221JW01

C39B, C48B

19

capacitor

12pF

0805

Murata

GRM21A5C2D120JW01

C41B, C42B

20

capacitor

47nF

0603

Murata

GRM188R71H473KA61

C43B, C44B

21

capacitor

8.2pF

0805

Murata

GQM2195C2E8R2BB12

C51B, C136B

22

Aluminum

solid cap

10uF

Würth

875105359001

C57B, C58B, C95B, C145B

23

capacitor

1nF

0603

Murata

GRM1885C2A102JA01

C85B, C88B, C91B, C92B, C94B

24

capacitor

100pF

0603

Murata

GRM1885C2A101JA01

C86B, C89B, C112B

25

capacitor

470nF

0603

Murata

GRM188R71C474KA88

C93B, C116B, C121B

26

capacitor

33pF

0805

Murata

GRM21A5C2D330JW01

C96B, C124B

27

capacitor

10uF

0805

Murata

GRM21BR61E106MA73

C117B, C118B

28

capacitor

20pF

0805

Murata

GQM2195C2E200GB12

C127B, C128B

29

capacitor

10nF

0603

Murata

GRM188R71H103KA01

C129B

Part 5

Parts List

Содержание X108G

Страница 1: ...he external power before opening case Do not forcibly remove any parts to avoid any damage Please use insulated screwdriver to adjust the circuit to avoid short circuit Do not turn on the radio for a...

Страница 2: ...0 45 180 mm Not including knob holder etc TX TX Power 15W 13 8V Modulation SSB Balanced modulation AM Low level modulation Spurious suppression 40dBc Carrier suppression 45dBc Selectivity SSB 2 2kHz 6...

Страница 3: ...Small signal front panel Part 2 Inside Circuit U17 Microprocessor RW4 Mic amplifier gain adjustment Intermediate frequency amplifier unit U10 Transmit Mixer U5 Receive Mixer...

Страница 4: ...Small signal back panel Local oscillator module BPF module...

Страница 5: ...U17B VC Voice Compressor Steady voltage power Final RF power amplifier Power standing wave detector...

Страница 6: ...he first IF amplify This amplified IF signal outputs to intermediate frequency crystal filter IFCF by T5 Q6 is NB control switch which controls the conducting of the Q21 3 1 4 IFCF sets The radio is b...

Страница 7: ...ts of U15B and U17B U15B SSM2167 has voice amplification and voice compression function and the compression ratio is switched by U15B 3 2 2 Modulator circuit The microphone amplified signal enters the...

Страница 8: ...t of antenna port and reflected power U5B buffs and amplify the tested output signal then sent to the microcontroller for processing and display the power and SW value 3 2 10 Automatic power control c...

Страница 9: ...nd voltage generator consists of microprocessor and U25 and U26 3 4 Power unit There are 2 groups main power supply for X108G 9V and 5V which are generated by U1B LM2940T 9 0 and U2B LM7805 on the pow...

Страница 10: ...r Measuring range 0 001 10A External speaker 8 2W All equipment has been measured and tested within the period of validity 4 2 Small signal board debugging 4 2 1 The small signal board has used the ne...

Страница 11: ...Setting specs RF signal source Frequency 14 251MHz initial output amplitude 10uV Audio analyzer SINAD test 1 Set the receiving frequency of X108G to be 14 25000MHz USB mode 2 Open PRE close ATT and AG...

Страница 12: ...close ATT and AGC and SQL 3 Measure the voltage of NB unit test point with digital multimeter 4 Adjust NB amplify IF transformerT16 to make the test point voltage to be minimum around 1 55V 5 Turn off...

Страница 13: ...tude by the each signal intensity as displayed on a screen and then press the SET button to enter the next level of signal settings 6 After setting all the signal levels press the SAVE button to save...

Страница 14: ...nplug the TX signal line from small signal board to the power amplifier board 4 Measure the amplitude of the test point TP10 with oscilloscope 5 Press PTT of hand microphone adjust PotentiometerRW4 to...

Страница 15: ...Required machines and its settings Machine Setting specs Audio frequency generator Frequency 1kHz Amplitude 100mV Vpp Spectrum analyzer Central frequency 14 25MHz BW 10MHz 50W RF load 1 Set the recei...

Страница 16: ...z BW 5MHz 50W RF load 1 Set the receiving frequency of X108G to be 14 25000MHz CW mode power 20W 2 Connect the RF load to the antenna interface of the X108G 3 Press the CW key to start the transmit me...

Страница 17: ...a dedicated test microphone to X108 disconnect the microphone input then press PTT to start the transmitting and record the current ammeter value as a baseline reading 6 Solder four debug solder join...

Страница 18: ...pF 0805 Murata GQM2195C2E750GB12 C26B C52B 12 capacitor 30pF 0805 Murata GQM2195C2E300GB12 C29B 13 capacitor 150pF 0805 Murata GRM21A5C2D151JW01 C30B 14 capacitor 27pF 0805 Murata GRM21A5C2D270JW01 C3...

Страница 19: ...1 Magnetic inductance T37 2 Through Hole HOMEMA DE L5B L6B 42 Magnetic inductance T37 2 Through Hole HOMEMA DE L7B L8B 43 Magnetic inductance T37 2 Through Hole HOMEMA DE L9B L10B 44 Magnetic inductan...

Страница 20: ...geo RC0603FR 075R1 R22B R26B 75 Resistance 1 8k 0603 Yageo RC0603FR 071K8 R24B R25B 76 Resistance 680R 0603 Yageo RC0603FR 07680R R27B R34B 77 Resistance 150R 0603 Yageo RC0603FR 07150R R28B 78 Resist...

Страница 21: ...n board parts NO Item SPECS PACKAGE BRAND MPN Designator 1 Capacitance 47uF 3225 Murata GRM32ER7YA476KE15L C1 2 Capacitance 100nF 0603 Murata GRM188R71H104KA93 C2 C3 C4 C5 C7 C8 C9 3 Capacitance 1nF 0...

Страница 22: ...RM1552C2A100GA01 C39 C44 8 Winding inductance 100uH 0805 TDK GLF2012T101K L1 L2 9 High Q Winding inductance 270nH 1210 TDK NLV32T 271J PF L3 L4 10 BTB Connector Spacing 0 8mm SMT domestic P1 11 RF Con...

Страница 23: ...72 C182 C188 C192 C201 C212 C215 3 Capacitance 2 2pF 0603 Murata GRM1885C2A2R2BA01 C3 C110 4 Capacitance 68pF 0603 Murata GRM1885C2A680JA01 C5 C10 C23 C36 C42 C69 C121 C164 5 Capacitance 1nF 0603 Mura...

Страница 24: ...Capacitance 2 2uF 0805 Murata GRM21BR71E225ME11 C179 C180 28 Capacitance 330pF 0603 Murata GRM1885C2A331JA01 C196 29 Capacitance 10pF 0603 Murata GRM1885C2A100JA01 C204 30 Capacitance 220pF 0603 Murat...

Страница 25: ...mm 2P domestic P7 54 BTB Connector spacing0 8mm SMT domestic P10 55 Connector MINI DIN6 Through Hole domestic P11 56 Digital triode DTC114EKA SC 59 ROHM DTC114EKA Q1 Q2 Q8 Q9 Q11 Q12 Q23 Q24 Q26 57 FE...

Страница 26: ...k 0603 Yageo RC0603FR 0747K R18 R138 R151 R152 78 Resistance 2 7k 0603 Yageo RC0603FR 072K7 R21 R29 R35 R46 R68 R81 R89 R90 R99 R131 79 Resistance 1M 0603 Yageo RC0603FR 071M R22 80 Resistance 220k 06...

Страница 27: ...sformer 1802 5x5 SMT T5 T16 112 IF transformer 1404 5x5 SMT T7 113 Single Pin Header 2 54mmspacing SIP2 domestic TP3 TP8 114 IC BU4S66G2 SOT 23 5 ROHM BU4S66G2 U1 115 IC LM321MF SOT 23 5 TI LM321MF U2...

Страница 28: ...ule 80m 160m module Xiegu XGM1 139 Xiegu module 40m 60m module Xiegu XGM2 140 Xiegu module 20m 30m module Xiegu XGM3 141 Xiegu module 15m 17m module Xiegu XGM4 142 Xiegu module 10m 12m module Xiegu XG...

Страница 29: ...Part 6 PCB Small signal board TOP...

Страница 30: ...Small signal board BOTT...

Страница 31: ...AMP Power board TOP...

Страница 32: ...AMP Power board BOTT...

Страница 33: ...Part 7 Radio block diagram...

Страница 34: ...T SW Keyer J5 PJ 3 5 ST SW R121 100R R122 100R LB4 600R LB6 600R C141 1nF C145 1nF L51 1uH R197 100R R196 100R C64 100nF R73 NC L23 1uH L24 1uH C148 100nF C149 100nF C150 100nF C151 100nF C152 100nF C...

Страница 35: ...F C38B 120pF Fo 14 5MHz L9B T37 2 11T L10B T37 2 11T C48B 220pF C49B 100pF 3 5 1 3 4 5 6 1 2 K11B HRB1 S DC5V 5 5 C41B 12pF C42B 12pF C47B 100pF Fo 21 5MHz L13B T37 2 8T L14B T37 2 9T C54B 68pF C55B 1...

Страница 36: ...WWW CQXIEGU COM XIEGU COMMUNICATIONS...

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