Summary of DX 959
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- 1 - dx 959 table of contents chapter 1 page specifications 1.0 general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 receiver. . . ....
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- 2 - dx 959 specifications 1.0 general model dx 959 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-in dynami...
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- 3 - figure 2-1 front panel 2.0 introduction this section explains the basic operating procedures for the galaxy dx 959 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 control this control is used...
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- 4 - off. When the roger beep is on, the radio transmits an audio tone at the end of your transmission. This indicates the end of your transmission so that people who are having trouble hearing you will know that you are done speaking. As a courtesy to others, use the roger beep only when necessary...
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- 5 - order to increase the signal-to-noise ratio of weak signals. While you will notice a dramatic reduction in the “rushing” sound when this filter is activated, it does not have much effect on the signal-to-noise ratio of strong signals. It is mostly used for ssb reception. 14. Mode switch this c...
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- 6 - 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 red wire. The black goes to negative and the red goes to positive. ...
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- 7 - 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 10 27.075 mhz 30 27.305 mhz 11 27.085 mhz 31 27.315...
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- 8 - microphone two inches from the mouth and speak clearly in a normal voice. The radio comes complete with low impedance (500 ohm) dynamic microphone. For installation instructions of the microphone, see section “alternate microphones and installation”. 2.3 operation 2.3.1 procedure to receive 1....
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- 9 - 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 insulating jacket of the microphone cable...
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- 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...
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- 11 - dx 959 chapter 3 circuit description 3.0 introduction this section explains the technical theory of operation for the galaxy dx 959 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 transmit...
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- 12 - dx 959 block diagram.
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- 13 - dx 959 circuit diagram.
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- 14 - dx 959 chapter 4 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 ...
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- 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...
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- 16 - 4.1.3 receiver alignment item u.U.T. Setting adjust point measurement am sensitivity set radio to ch 19 am rx mode. Clarifier setting in 12 o’clock. Rf gain fully clockwise, sq fully counter clockwise. Vol control at 2 o’clock. Connect rf sg to antenna jack set frequency to 27.185 mhz, mod 30...
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- 17 - figure 4-1 transmitter test setup figure 4-2 receiver test setup.
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- 18 - figure 4-3 main pcb adjustment location chapter 5.
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- 19 - dx 959 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 ...
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- 20 - dx 959 chapter 6 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 959 vr p.C.B item reference number ranger part number description 1 ept095950z vr p.C.B. 2 ...
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- 21 - part list : dx 959 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...
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- 23 - part list : dx 959 rotary sw p.C.B item reference number ranger part number description 1 ept099n20z rotary sw p.C.B. 2 j4,j5 ex07n48223 pcb c/s 2p 3 j8 ex07n48209 pcb c/s 10p 4 j1,j2 ex07n48928 pcb c/s 12p 5 j3 ex07n48222 pcb c/s 5p 6 s201 ewrt32000s rotary sw 7 r202,r204-r217 rcy011024z 1k ...
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- 24 - part list : dx 959 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...
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- 25 - part list : dx 959 meter p.C.B item reference number ranger part number description 1 ept055v51z meter p.C.B. 2 r11 rcp166824z 6.8k ohm 1/4w 3 r9 rcp163934z 39k ohm 1/4w 4 r1 rcu143904z 39 ohm 1/4w 5 r12,c3 rcu141024z 1k ohm 1/4w 6 r3 rcu144724z 4.7k ohm 1/4w 7 r2 rcu141034z 10k ohm 1/4w 8 r8...
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- 26 - part list : dx 959 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 c501 cm0502235z ...
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- 27 - part list : dx 959 display p.C.B item reference number ranger part number description 1 ept073n30z display p.C.B. 2 display p.C.B. Ex03n40483 led display 3 r325,r327 rcy011024z 1k ohm 0.1w 4 ant ex01y40116 led lamp 5 r.B ex01y40117 led lamp 6 t/r ex01y40114 led lamp 7 led1,led2,led3, led4,led...
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- 28 - part list : dx 959 mode p.C.B item reference number ranger part number description 1 ept095930z mode p.C.B. 2 swr,off,pa,usb, low ewsl31027k slide sw remark: solder side (white).
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- 29 - dx 959 main pcb. Remark: solder side (white) part list dx 959 main pcb.
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- 30 - 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 rcp165604z 56 Ω 1/16w r11, 10...
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- 31 - 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 efcfw455ht ceramic filter fl2 efcfe107mx ceramic filter fl3 efx8106952 crytal filter x1 eycab10240 crystal filter x3 eycaa15360 crystal ...
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- 32 - j20-meter ex07n48997 wire conn/h j4(meter)-j16(40z) ex07n48901 wire conn/h j1(meter)-j4(40z) ex07n49002 wire conn/h j11-j8(20z)-12(40z)- j10 ex07n49029 wire conn/h j18 ex07n49024 wire conn/h j3 ex07n49073 wire conn/h j9 ex07n49023 wire conn/h j3(meter)-j9(20z) ex07n49005 wire conn/h lamp-j1(2...
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At0959040a.