Summary of DX 949
Page 2
- 1 - dx 949 table of contents chapter 1 page specifications 1.0 general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 receiver. . . ....
Page 3
- 2 - dx 949 chapter 1 specifications 1.0 general model dx 949 frequency range 26.965 - 27.405mhz. Emission modes am/usb/lsb frequency control phase lock loop (pll) synthesizer. Frequency tolerance ± 0.005 %. Frequency stability ± 0.001 %. Operating temperature range -30 °c to +50°c. Microphone plug...
Page 4
- 3 - dx 949 chapter 2 operation figure 2-1 front panel 2.0 introduction this section explains the basic operating procedures for the galaxy dx 949 mobile transceiver. 2.1 control and connections 2.1.1 front panel refer to the above figure 2-1 for the location of the following controls. 1. Squelch c...
Page 5
- 4 - adjusts the microphone gain in the transmit and pa modes. This controls the gain to the extent that full talk power is available several inches away from the microphone. In the public address (pa) mode, the control functions as the volume control. Pushing this knob turns the roger beep on and ...
Page 6
- 5 - in the pa position, your voice will come out of the speaker that you need to plug in to the pa. Sp. Jack on the rear panel. The radio does not operate when you are in the pa mode. The cb mode is normal operation of the radio. In the gnf mode, you are in cb operation but the galaxy noise filter...
Page 7
- 6 - figure 2-2 represent the location of the following connections : figure 2-2 rear panel 1. Antenna this jack accepts 50 ohms coaxial cable with a pl- 259 type plug. 2. Power this connector accepts 13.8v dc power cable with built-in fuse. The power cord provided with the radio has a black and re...
Page 8
- 7 - channel channel frequency channel channel frequency 1 26.965 mhz 21 27.215 mhz 2 26.975 mhz 22 27.225 mhz 3 26.985 mhz 23 27.255 mhz 4 27.005 mhz 24 27.235 mhz 5 27.015 mhz 25 27.245 mhz 6 27.025 mhz 26 27.265 mhz 7 27.035 mhz 27 27.275 mhz 8 27.055 mhz 28 27.285 mhz 9 27.065 mhz 29 27.295 mhz...
Page 9
- 8 - the receiver and transmitter are controlled by the push-to-talk switch on the microphone. Press the switch and the transmitter is activated, release switch to receive. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal voice. The radio comes complete...
Page 10
- 9 - pin number mic cable lead 1 audio shield 2 audio lead 3 transmit control 4 receive control figure 2-3 your transceiver microphone schematic if the microphone to be used is provided with pre-cut leads, they must be revised as follows : (i) cut leads so that they extend 7/16” beyond the plastic ...
Page 11
- 10 - to wire microphone cable to the plug provided, proceed as follows : (i) remove the retaining screw. (ii) unscrew the housing from the pin receptacle body. (iii) loosen the two cable clamp retainer screws. (iv) feed the microphone cable through the housing, knurled ring and washer as shown fig...
Page 12
- 11 - dx 949 circuit description 3.0 introduction this section explains the technical theory of operation for the galaxy dx 949 mobile transceiver. 3.1 pll circuit the phase lock loop (pll) circuit is responsible for developing the receiver’s first local oscillator signal and the transmitter’s exci...
Page 13
- 12 - dx 949 circuit diagram.
Page 14
- 13 - chapter 4.
Page 15
- 14 - dx 949 alignment 4.0 required test equipment c dc power supply (13.8vdc, 10a) d rf wattmeter (25~60 mhz, 25w) e multimeter f automatic modulation meter g audio signal generator h frequency counter (100 mhz) i rf signal generator (100 mhz) j automatic distortion meter k oscilloscope (50 mhz) l...
Page 16
- 15 - 4.1.2 transmitter alignment item u.U.T. Setting adjust point measurement bias current set radio to ch 19 usb tx mode. Mod off. Connect current meter to tp7(+) and tp9(-) connect current meter to tp7(+) and tp8(-) vr12 vr10 50 ma 100 ma ssb tx power set radio to ch 19, usb tx mode. Connect “sh...
Page 17
- 16 - item u.U.T. Setting adjust point measurement am sensitivity set radio to ch 19 am rx mode. Clarifier setting at 12 o’clock. Rf gain fully clockwise, sq fully counter clockwise. Vol control at 2 o’clock. Connect rf sg to antenna jack output frequency 27.185 mhz, mod 30%. Set radio to ch 40 am ...
Page 18
- 17 - figure 4-2 receiver test setup.
Page 19
- 18 - figure 4-3 main pcb adjustment locations chapter 5.
Page 20
- 19 - dx 949 maintenance 5.0 precautions the inherent quality of the solid-state components used in this transceiver will provide many years of continuous use. Taking the following precautions will prevent damage to the transceiver. (i) never key the transmitter unless an antenna or suitable dummy ...
Page 21
- 20 - dx 949 diagrams & parts list 6.0 general information on most electrical and mechanical parts is included in the parts list. The reference designators are in alphanumeric order. Part list: dx 949 vr p.C.B item reference number ranger part number description 1 ept095950z vr p.C.B. 2 j1,j2 ex07n...
Page 22
- 21 - part list : dx 949 ant p.C.B item reference number ranger part number description 1 ept360042z ant p.C.B. 2 r9 rcy010004z 0 ohm 0.1w 3 r1 rcy014714z 470 ohm 0.1w 4 r3,r4 rcy011014z 100 ohm 0.1w 5 r2 rcy013314z 330 ohm 0.1w 6 r5,r11 rcy011024z 1k ohm 0.1w 7 r10 rcy012224z 2.2k ohm 0.1w 8 r12 r...
Page 23
- 22 -.
Page 24
- 23 - part list : dx 949 rotary sw p.C.B item reference number ranger part number description 1 ept094920z rotary sw p.C.B. 2 r202,r204-r217 rcy011024z 1k ohm 0.1w 3 q201 ty2sc2712g tr 2sc2712 4 rotary sw ewrt32000s rotary sw 5 j7,j9,j10 ex07n48223 pcb c/s 2p 6 j1 ex07n48234 pcb c/s 2p 7 j3,j5 ex07...
Page 25
- 24 - part list : dx 949 mic p.C.B item reference number ranger part number description 1 ept690050z mic p.C.B. 2 c501,c502,c503,c504 cc0501027l 0.001 µf 50v 3 c505,c506 cc0501037l 0.01 µf 50v 4 q501 tdta0124es t/r dta124es 5 l501 ecchk16001 choke coil 5.6 µh 6 l502 ecbad18526 bead coil 7 mic pcb e...
Page 26
- 25 - part list : dx 949 meter p.C.B item reference number ranger part number description 1 ept055v51z meter p.C.B. 2 r11 rcp166824z 6.8k ohm 1/16w 3 r9 rcp163934z 39k ohm 1/16w 4 r1 rcu143904z 39 ohm 1/4w 5 c3 rcu141024z 1k ohm 1/4w 6 r3 rcu144724z 4.7k ohm 1/4w 7 r2 rcu141034z 10k ohm 1/4w 8 r8 r...
Page 27
- 26 - part list : dx 949 band p.C.B item reference number ranger part number description 1 ept095940z band p.C.B. 2 vol/sq rv50303522 vr 50kb/50ka w/sw 3 rf gain rv10203528 vr 1kb 4 dim on/off rv50203542 5kb/push sw 5 mic/r.B on rv10203541 1ka/push sw 6 rf power rv50203525 vr 5kb 7 band p.C.B. Enrg...
Page 28
- 27 - part list : dx 949 display p.C.B item reference number ranger part number description 1 ept094930z display p.C.B. 2 display p.C.B. Ex03n40483 led display 3 r325,r326 rcy011024z 1k ohm 0.1w 4 c501 ck1103ab6u 0.01 µf 50v 5 ant ex01y40116 led lamp 6 r.B ex01y40117 led lamp 7 t/r ex01y40114 led l...
Page 29
- 28 - dx 949 main pcb. Remark: solder side (white).
Page 30
- 29 - part list dx 949 main pcb reference number ranger part no. Description ept069610z main p.C.B tp7,8,9 ept120060z p.C.B dc b+ tp6 rcp160004z 0 Ω 1/16w r246 rcp161004z 10 Ω 1/16w r267 rcp161504z 15 Ω 1/16w r241 rcp162204z 22 Ω 1/16w r113,133,213,253,282 rcp164704z 47 Ω 1/16w r130,215,220,294 rcp...
Page 31
- 30 - c13,21,22,44,82,115, 132,158,275,276,239 ce0251067z 10uf 25wv c80,181 ce0252267z 22uf 25wv c33,37,144,175 ce0254767z 47uf 25wv c156,238,293,107 ce0161077z 100uf 16wv c152,179 ce0163377z 330uf 16wv c91 ce0104777z 470uf 10wv c243,248 ce0251087z 1000uf 25wv c35 cem254767z 47uf 25wv fl1 efcfw455h...
Page 32
- 31 - ic8 enta07222a ta7222ap q54 t2sb00754y 2sb754y q49 t2sc02166c 2sc2133c q47 t2sc01969c 2sc1969c q37 t2sa01869z 2sa1869.
Page 33
- 32 -.
Page 34
- 33 - at0949040a.
Page 35
- 34 -.