Standard C828M Operating Instructions Manual Download Page 1 | Manualshive

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Summary of Contents for C828M

Page 1: ...OPERATING INSTRUCTIONS C828M 2m FM lOW ...

Page 2: ...ctory We are sure that a number of features and excellent reliability will pro vide you with great satisfaction 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 TABLE OF CONTENS Features of C828M 2 Cautions Prior to Use 6 Installation Procedures 8 Communication Procedures 9 Repeater Offset Oscillator 10 Busy Indicator Lamp 10 Meter 11 Stand 11 Adjustment of Microphone Sensitivity 12 Microphone Conn...

Page 3: ...pancy of small space serves for the efficient employment of the limited interior room of the car 3 Single Crystal System Common to Transmission and Reception The adoption of the Single crystal system in which one crystal is used for both transmission and reception of Signals has opened the way to an economical In stallation of additional Channels and the very expedient experiment or Operation in J...

Page 4: ...ccessory terminal on the rear panel the squelch time constant can be changed to the best suitable value for respective uses as mobile and fixed stations 7 3W of Audio Output The maximum audio Output is as high as 3W permitting the Operation of your transceiver at Optimum sound level even in a noisy expressway 8 Busy Indicator Lamp The green lamp turns off and on in association with the squelch cir...

Page 5: ...delicate alignment for both the transmitter and receiver performs accurate adjustment of all the Channel fre quencies 9 Uncasing Possible with No Holp of Tools Uncasing is possible with the two screws in the rear removed by the fin gertip Operation This feature lends itself to the addition of the Channel and other purposes 10 Anodized Alminum Chassis Anodized alminum is used for both the case and ...

Page 6: ...sible damage caused in wrcng connec tion of the power supply 18 Ant Protector Antenna protector circuit Starts to work on when antenna becomes to open or Short circuit or degradation of SV R Transmitting LED goes to dark when there is no more RF output Ii r ic occasion try to find out abnormal point on the antenna circuit and reset radio to a normal condition of the transmission Accordingly the an...

Page 7: ... 2 DO NOT connect or disconnect the antenna or external Speaker when the power supply switch is in ON position 3 DO NOT push the microphone switch with the antenna left disconnected 4 BE SURE to replace the blown off fuse withe a new one rated at 3A 5 CHECK to see the polarity of the electrical system prior to the power supply connection C828M is designed for negative grounding the black lead shou...

Page 8: ...eater Indicator Lamp Mounting Metal Brackel Auxiliary Mounting Metal Brackel Volume Control Knob Power Switch Squelch Control Knob Channel Selector EXT OSC Switch Antenna Connector F T T Switch External Speaker Terminal Busy Indicator Lamp ...

Page 9: ...er be set upright for use in yachts commercial vehicleshetc After the instaliation position is determined install the transceiver according to the following procedures 1 Take out the furnished mounting metal bracket 17 and attach it to the body of the transceiver 2 Position the mounting bracket in predetermined instaliation place make a bore for the bracket with a 5 5 5mm drill and secure it with ...

Page 10: ... 2 using an empty Channel Turn the knob slowly in the clockwise direction until you come to a point where the noise suddenly goes off Set the SQL knob on this point and you will hear no noise but the incoming Signal alone through the Speaker In this case if the signal is unclear because of the squelch circuit being off and on due to the signal condition of your party s Station turn the SQL knob sl...

Page 11: ... switch set to REPEATER position A the second offset oscillator 21 4 MHz is operated and the transmit frequency is lowered to 600kHz below the re ceive frequency thus changeover to the repeater Channel can be accomplished by one finger action The frequency used for the first local oscillator for the repeater Channel is therefore referred to the receive frequency see Ordering the Crystal Oscillator...

Page 12: ...swing the pointer by 8 graduations is equivalent to 5fiY 14dB The indication of receive signal Output is set to about 8 graduations See Fig 7 1 for the relationship between the incom ing signal and the scale of the meter 14 0 1 10 2 4 6 8 Meter indicator Figure 7 1 8 Stand C828M is provided with the stand i9 for use as a fixed Station Insert the stand into the small bores on both sides of the case...

Page 13: ...xed resistor R301 as shown in Fig 9 1 below Alignment of mike sens R301 i Alignment of deviation R311 1 o Figure 9 1 10 Microphone Coiinector Microphone connection will be made as indicated in the Figure below Figure 10 1 No 1 Hot microphone terminal common with AT 2 No 2 Grounding terminal common with AT 1 No 3 Microphone push button terminal common with AT 3 No 4 Audio Output terminal common wit...

Page 14: ...y connections using this terminal Terminal No Connection AT 1 Grounding AT 2 External oscillator switching AT 3 N C AT 4 N C AT 5 First local oscillator input AT 6 FM detector Output AT 7 External oscillator VFO input AT 8 13 8V receiving time AT 9 13 8V power supply before power supply switch is turned on Fig 11 1 AT 13 ...

Page 15: ...crystal oscillat ing unit see Fig 12 1 below CRYSTAL LOCATION oo CKSE OCES CKSn CKEID OdOD CKmD CKHE ÜöSkD UDO QlilHD Figure 12 1 3 Frequency Adjustment The offset oscillator of C828M and the frequencies of the actually loaded Chan nels have been precisely adjusted However if additional Channels are installed be sure to perform necessary Channel frequency adjustments In case that a fre quency coun...

Page 16: ... transmit and receive frequencies Have him adjust his transmit and receive frequencies in the same manner 13 Accessory Parts The following accessory parts are availabi for C828M 1 Speaker box C205K 4 ohms 2 AC Power supply C12 120 5 13 8 V 3A 3 AC power supply C12 120 2 9 16 V 6 5A 4 VFO CVllO 14 Gonnection of Extemal Speaker If large sound volume is desired connect external Speaker to SPK termina...

Page 17: ...installa tion fer mobile Station use 3 Use the antenna of high Performance Coaxial Cable 1 Use the coaxial cable having a matched impedance of 50 ohms Do not use 3C 2V 5C 2V etc because they are rated at 75 ohms of impedance 2 The coaxial cable should be preferably as large as possible in size If the cable length is less than 5m use RG 58U 5D 2V etc If the cable length is longer than 5m use RG 8U ...

Page 18: ...s bailery distributer ignilion su iich ignition coil ignilion plug circuil breaker A C E Anti noise capacilor for automobile B O Anii noise resislor for automobile Figure 16 1 The noise prevention capacitors and resistors may be inserted in the placesshown as A B C D and E in Fig 16 1 above In some cars the noise can be preveted with such insertion at only one place In some other cars noise can be...

Page 19: ...ity 8 Bandwidth 9 Selectivity 10 Spurious Response 11 Allowable Maximum Frequency Deviation 12 Audio Output 144 MHz and FM amateur transceiver 12 Channels mO MaOMHz 145 0 147 0MHz and 146 0 148 0MHz 30X 60 C Dynamic type with memory switch with Neoprene coiled cord 13 8V DG 20 negative grounding In transmission 2 6A In reception Max Output 0 8A In standby 0 32A 37 transistors 20 diodes and 1 IC 84...

Page 20: ...ER AMP 22 _J DETECTORj gn NOISE 1 AMP D C AMP f NOISE NOISE AMP AMP AF AMP D C AMP S W POWER AMP BUSY IND POWER AMP S P Hd r0 ISTLOCAL OSC IST 2ND aRD OFFSET DOUB r DOUB DOUB i 1 MIX EXTOSC IND EXT OSC V4 METER DETECT EXT OSC R P T IND AF AMP MOD OFFSET OSC MOD OFFSET OSC 21 4 I MHz OFFSET OSC OFFSET sw AMP AMP PRE DRIVER 19 ...

Page 21: ...YSW MAIN OSC b oOq R sUblil f l XlS gSTTTT 0255 IJtOFFSET OSC 2SC535 R26S 3 6 22 OMHi 0253 EXT OSC SW 2SA7330 EXT NC OSC INPUT W 0254 EXT OSC SW aS2 220K DIM 2SCI2I3 0256 2SCI2I3 IflOFF SEX 0113 2nd OFF SETOSC 2SC535B ZWMHz WHZj r Tn Q30I SPLATTER RLTCR Rsoa R30J roio 2SC945 cire 51 OfFSETMiX_I_ 3SK40 J005 MIO JACK W P IF TZ K kO N H lOu 6 BK 6eK 6 eK n äß R302S i ilOOTej QII7 3fdCFF SET 2SCS33 C2...

Page 22: ... o CO 0316 eUSYLAMPORIVER SO AMP 0311 SO SWITCH 2SC8298 C364 01 r CURRENT ANT PROTECTOR L40I J002 ANTJ X J40IO 0303 PRE DRIVE 0304 DRIVE 0115 TXAMPI S12SCS35B II STX AMP rrte LTKivb ukivc C32220P es 2SC74I _ P 3o 2SC730 pIfSBT A roin H r J ftT r _r J ca3 mn 0305 FINAL 2N60e2 LSIS LJI L3Z0 4581 851 013 20 ...

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