- 1 - dx 2547 table of contents page chapter 1 specifications 1.0 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 receiver ....
- 2 - dx 2547 specifications 1.0 general model dx 2547 frequency range 26.965 – 27.405 mhz 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 dynamic ptt, 500 Ω i...
- 3 - figure 2-1 front panel 2.0 introduction this section explains the basic operating procedures for the galaxy dx 2547 base station 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. Phone jack used to connect he...
- 4 - adjusts the microphone gain in the transmit and pa mode. 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. 6. Swr/mod/pwr switch this switch controls the ...
- 5 - when activated, allows adjustment of the receive frequency above or below the channel frequency by up to 800hz. Although this control is intended primarily to tune in ssb signals, it may be used to optimize am signals as well. 17. Clarifier led this led lights when the clarifier control is act...
- 6 - 31. Anl led this led lights red when the anl is on. 32. Usb led this led lights red when the radio is in the usb mode. 33. Am led this led lights red when the radio is in the am mode. 34. Nb led this led lights red when the nb is on. 35. Lsb led this led lights red when the radio is in the lsb...
- 7 - figure 2-2 rear panel 1. Ac power cord connect to ac power outlet for ac main supply. 2. Fuse accommodates a fuse for ac input circuit protection. Use a 125v 2a fuse for replacement. 3. Dc power this accepts a 13.8v dc power cable with built-in 7a fuse. The power cord provided with the radio h...
- 8 - channel channel frequency (mhz) channel channel frequency (mhz) 1 26.965 21 27.215 2 26.975 22 27.225 3 26.985 23 27.255 4 27.005 24 27.235 5 27.015 25 27.245 6 27.025 26 27.265 7 27.035 27 27.275 8 27.055 28 27.285 9 27.065 29 27.295 10 27.075 30 27.305 11 27.085 31 27.315 12 27.105 32 27.325...
- 9 - microphone two inches from your mouth and speak clearly in a normal voice. The radio comes complete with a low impedance (500 ohm) dynamic microphone. 2.3 operation 2.3.1 procedure to receive 1. Be sure that the power source, microphone and antenna are connected to the proper connectors before...
- 10 - comprise two of the leads. The third lead is for transmit control and the fourth is for receiving control. The microphone should provide the functions shown in the schematic below (figure 2-3). 4 wire mic cable pin number mic cable lead 1 audio shield 2 audio lead 3 transmit control 4 receive...
- 11 - 3.0 introduction this section explains the technical theory of operation for the galaxy dx 2547 base station 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 exciter signal. The pll ...
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- 14 - dx 2547 chapter 4 alignment 4.0 required test equipment c dc power supply (13.8vdc, 10a) d rf wattmeter (100 mhz, 50w) e multimeter (digital) f automatic modulation meter g audio signal generator h frequency counter (100 mhz) i rf signal generator (100 mhz) j automatic distortion meter k osci...
- 15 - item u.U.T. Setting adjust point measurement bias current set radio to ch 19 usb tx mode. Modulation off. Connect current meter to tp7(+) and tp9 (-) connect current meter to tp7 (+) and tp8 (-) vr12 vr10 50 ma 100 ma ssb apc set radio to ch 19 usb rx mode. Connect multimeter to tp7. Vr17 12....
- 16 - item u.U.T. Setting adjust point measurement am sensitivity set radio to ch 19 am rx mode. Set rf gain fully clockwise. Set sq fully counter clockwise. Set vol control at 2 o’clock. Set nb/anl switch to off position. Set tone fully clockwise. Set clarifier control to 12 o’clock. Connect rf sg...
- 17 - figure 4-1 transmitter test setup figure 4-2 receiver test setup.
- 18 - dx 2547 chapter 5 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 suit...
- 19 - dx 2547 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..
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- 21 - part list: dx 2547 rotary sw p.C.B item reference number ranger part number description 1 ept0ssb30a rotary sw pcb 2 r301 rcy014714z c/f/r 470 Ω 0.1w 3 r302,r303,r304,r305, r306,r308,r309,r310, r311,r312,r313 rcy011024z c/f/r 1k Ω 0.1w 4 r314 rcy013324z c/f/r 3.3k Ω 0.1w 5 r315 rcy011034z c/f...
- 22 - part list: dx 2547 hp 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...
- 23 - part list:.
- 24 - dx 2547 hp ant p.C.B item reference number ranger part number description 1 ept009830z ant pcb 2 r312 rcy011004z c/f/r 10 Ω 0.1w 3 r308 rcy011014z c/f/r 100 Ω 0.1w 4 r316 rcy012714z c/f/r 270 Ω 0.1w 5 r323 rcy012224z c/f/r 2.2k Ω 0.1w 6 r324 rcy014724z c/f/r 4.7k Ω 0.1w 7 r325 rcy011024z c/f/...
- 25 - part list: dx 2547 push sw p.C.B item reference number ranger part number description 1 ept254720z push sw pcb 2 pa,rb ewps33033x push sw 3 j201 ex07n49140 pcb conn/s 2pin 4 cb/g/pa ex07n49144 pcb conn/s 3pin remark: copper side (white).
- 26 - part list: dx 2547 push sw p.C.B item reference number ranger part number description 1 ept254750z push sw pcb 2 j501 ex07n48234 pcb conn/s 2pin 3 j503 ex07n48761 pcb conn/s 4pin 4 j502 ex07n48667 pcb conn/s 5pin 5 9/nol/19 ewrt32087s rotary sw 6 squelch rv50303532 vr 50kb 7 volume rv50303547...
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- 28 - part list: dx 2547 display p.C.B item reference number ranger part number description 1 ept254740z display pcb 2 c401 cem164767z e/c 47uf 16wv 3 r414,r420,r421 rcp160004z c/f/r 0 Ω 1/16w 4 r422 rcp161014z c/f/r 100 Ω 1/16w 5 r401-r408 rcp164714z c/f/r 470 Ω 1/16w 6 r409,r417,r425-r428 rcp1610...
- 29 - part list: dx 2547 talkback p.C.B item reference number ranger part number description 1 ept254760z talkback pcb 2 talkback pcb ex07n48667 pcb conn/s 5pin 3 talkback rv20303558 vr 20 la remark: copper side (white).
- 30 - part list: dx 2547 mic p.C.B item reference number ranger part number description 1 ept253750z mic pcb 2 c503,c504,c505,c506 cc0501027l c/c 0.001uf 50wv 3 c501,c502 cc0501037l c/c 0.01uf 50wv 4 q501 tdta0124es tr dta124es 5 l501 ecchk16001 choke coil 6 l502 ecbad18506 bead coil 7 1~4 ex06n411...
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- 32 - part list: dx 2547 counter p.C.B item reference number ranger part number description 1 ept900040z counter p.C.B 2 r40 rcy010004z 0 ohm 0.1w 3 r19-r39 rcy011014z 100 ohm 0.1w 4 r6 rcy013314z 330 ohm 0.1w 5 r9 rcy014714z 470 ohm 0.1w 6 r4,r5 rcy012224z 2.2k ohm 0.1w 7 r7 rcy014724z 4.7k ohm 0....
- 33 - part list: dx 2547 dim / rf / mic gain p.C.B item reference number ranger part number description 1 ept254770z dim/rf/mic gain pcb 2 j601 ex07n49095 pcb conn/s 6pin 3 j603 ex07n48947 pcb conn/s 3pin 4 j602 ex07n48234 pcb conn/s 2pin 5 rf/mic gain rv10203524 vr 1kb/1ka 6 dim-tone rv20403546 v/...
- 34 - part list: dx 2547 rf / mod p.C.B item reference number ranger part number description 1 ept254780z rf / mod p.C.B 2 j801 ex07n48234 pcb conn/s 2pin 3 j802 ex07n48620 pcb conn/s 7pin 4 swr/mod/pwr ewrt32087s rotary sw 5 rf power rv50203525 vr 5kb remark: copper side (white).
- 35 - part list: dx 2547 mode / fine p.C.B item reference number ranger part number description 1 ept254790z mode / fine pcb 2 j903 ex07nm48947 pcb conn/s 3pin 3 j901,j902 ex07n48761 pcb conn/s 4pin 4 usb/ am/ lsb ewrt32087s rotary sw 5 clarifier rv10203528 vr ikb remark: copper side (white).
- 36 - part list: dx 2547 ear p.C.B item reference number ranger part number description 1 ept253790z ear pcb 2 pa,ext sp ex06n41034 ear jack 3 j2,j3 ex07n48223 pcb conn/s 2pin 4 j1 ex07n48350 pcb conn/s 3pin 5 jp1 wx01070710 jumper wire 6 c902,c901 cc0501027l c/c 0.001uf 50wv remark: copper side (w...
- 37 - part list: dx 2547 dc p.C.B item reference number ranger part number description 1 ept253770z dc pcb 2 r707 rcu141034z c/f/r 10k Ω 1/4w 3 r704 rcp104704z c/f/r 47 Ω 1w 4 r705 rcp101014z c/f/r 100 Ω 1w 5 r706 rcp102214z c/f/r 220 Ω 1w 6 r702,r703 rcp108214z c/f/r Ω 1w 7 r701 rcp101224z c/f/r 1...
- 38 - part list: dx 2547 dc p.C.B item reference number ranger part number description 1 ept253780z dc pcb 2 dc pcb tz2n05301z tr 2n5301 remark: copper side (white).
- 39 - dx 2547 main pcb.
- 40 - part list dx 2547 main pcb reference number ranger part no. Description ept069610z main pcb 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 r130,215,220,249 rcp165604z 56 Ω 1/16w r11,101 rcp166804z 68 Ω 1/16w r5,8,30,...
- 41 - 188,189,205,305,219, 229,230,232,241,247, 254,255,265,267,269, 271,278,284,285,298 c32,42,45,46,162,163 ,221,64 cc0504727l 0.0047uf 50wv c155 cc0502237l 0.022uf 50wv c200 cc1001037l 0.01uf 100wv c199 cd3005614z 560pf 300wv c97,149 ct0161046z 0.1uf 16wv c154 ct0162246z 0.22ud 16wv c98,180,299,...
- 42 - j6,9,11,20 ex07n48350 p/c/s 3p j21,28 ex07n48490 p/c/s 4p j3,5 ex07n48222 p/c/s 5p j13 ex07n48331 p/c/s 6p j14 ex07n48224 p/c/s 7p j33 ex07n48209 p/c/s 10p j12 ex07n41227 p/c/s 3p tp2,3,5,6 ex07n48612 p/c/s 1p tp7,8,9 xzzz90006z pcb stopper j6-25470z,j9-254740z ex07n48920 w/c/h 3p j13-70z ex0...
- 43 - main pcb adjustment location.
- 44 - any updates or corrections to this service manual will be included in the tech support section of our website at www.Galaxyradios.Com. Updates & corrections.
