Icom IC-751 [6/37] 1 unpacking

Содержание

• Ic 75h 1
• Ic 75h 2
• General 4
• Receiver 4
• Section 1 specifications 4
• Transmitter 4
• All band all mode all solid state 5
• Dual vfo 5
• General coverage receiver capability 5
• Memories 5
• Other features 5
• Outstanding receiver performance 5
• Section 2 features 5
• Transmitter 5
• 1 unpacking 6
• 2 recommendations for 6
• 3 power supply 6
• Be sure to read the following instructions carefully before operation 6
• Installation 6
• Section 3 installation 6
• 10 headphones 7
• 4 antenna 7
• 5 ground 7
• 6 microphone 7
• 8 cw key 7
• 8 rtty 7
• 9 external speaker 7
• 1 front panel 8
• 11 cooling fan 8
• By the monitor curcuit the fan will operate during both 8
• Cause of the overheating before starting to transmit again 8
• Cooling but with 200 watts input the final stage produces 8
• If the temperature rises to a danger limit 90 c the fan 8
• Mit modes 8
• Of the final stage the fan operates as follows 8
• Overheating i e antenna mismatch etc and correct the 8
• Perature monitoring circuit which monitors the temperature 8
• Plug inserted completely only the headphone works 8
• Power is reduced to 50 watts investigate the cause of 8
• Prolonged transmissions the fan is connected to a tem 8
• Quite a bit of heat and its temperature may rise during 8
• Section 4 operating controls 8
• The fan does not operate both in the receive and thans 8
• The headphone will lose the sound on one side with the 8
• The rear of the pa unit is designed to provide for adequate 8
• Transmit and receive to provide additional cooling 8
• Using a tape recorder connected to the headphone jack 8
• When the temperature rises to a point 50 c detected 8
• Will run much more rapidly at this time the output 8
• With a stereo headphone set inserted this way however 8
• 2 top cover 13
• 3 rear panel connections 13
• And attenuator are removed from the circuit and incoming 13
• Anti vox circuit with this control along with the vox 13
• Anti vox control 13
• Attenuation 13
• Calibrates the marker frequency with a standard frequency 13
• Controls the audio level of the monitoring ssb or cw side 13
• For normal operation leave this switch in the off 13
• Gain control so that the vox circuit only operates by the 13
• In vox operation the vox circuit may be operated by 13
• Marker calibrator 13
• Marker switch 13
• Monitor level control 13
• Operator s voice not by sound from the speaker 13
• Position 13
• Preamp att attenuator switch 13
• Put in the rf circuit and provides higher sensitivity 13
• Quency is available on every 10khz 13
• Signals will be fed to the receiver directly 13
• Sound from the speaker causing a switch to transmit this 13
• Such as the wwv 13
• Switches rf preamplifier and attenuator in the rf circuit 13
• The attenuator into the circuit this gives about 20db 13
• The switch in the pre position and the preamplifier is 13
• This removes the preamplifier from the circuit and inserts 13
• Tone when the monitor switch on the front panel is 13
• Trouble can be prevented by adjusting the input level of the 13
• Turned on adjust the control for comfortable monitoring 13
• Turns the marker circuit on or off the marker fre 13
• Very strong signal set this switch in the att position 13
• When nearby signals interfere with reception or receiving a 13
• When the switch is in the off position both preamplifier 13
• When using a small antenna or receiving a weak signal set 13
• 1 how to tune 15
• Section 5 operating instructions 15
• N n n 1 19
• 2 memory channel operation 20
• 3 tuning by up down buttons on 22
• The microphone 22
• 4 scanning operation 23
• 5 ssb operation 24
• 6 cw operation 26
• 7 rtty operation 27
• 8 am operation 28
• 9 fm operation 28
• 10 general coverage receiver 29
• 11 other operations 29
• 1 installation of optional filter 31
• Section 6 option installation 31
• 2 built in power supply unit 32
• Ic ps35 32
• Ic ом 37

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SECTION 3 INSTALLATION BE SURE TO READ THE FOLLOWING INSTRUCTIONS CAREFULLY BEFORE OPERATION like to use your car battery or any other DC power supply be sure that its output voltage is 12 15 Voltsand the current capacity is at least 20 Amps The maximum power con sumption of the set during transmission runs from 16 20 Amps so keep that in mind if the unit is installed in your automobile and turn it on after you have started the engine Attention should also be paid to the condition of the bat tery and electrical system 3 1 UNPACKING Carefully remove your transceiver from the packing carton and examine it for signs of shipping damage Should any be apparent notify the delivering carrier or dealer im mediately stating the full extent of the damage It is recommended you keep the shipping cartons In the event storage moving or reshipment becomes necessary they will be handy Accessory cables plugs etc are packed with the transceiver Make sure you have not overlooked The connection of the DC power cord supplied with the IC 751 is done in the following way First make sure that the power switch of the unit is in the OFF position and the T R switch is in the receive position Connect the cord to the DC power supply with the RED lead to the positive terminal and the BLACK lead to the negative terminal Reverse connection will cause the protection circuit to operate and blow the fuse Connect the DC plug to the socket on the rear panel of the IC 751 Refer to the drawing below anything 1 DC Power Cord 1 2 Pin Plugs 2 3 External Speaker Plug 1 4 Spare Fuses 20 Amp 2 5 Spare Fuses 3 Amp 2 6 Key Plug 1 3 2 RECOMMENDATIONS FOR INSTALLATION 1 Avoid placing the IC 751 in direct sunlight high tem perature dusty or humid places 2 The temperature of the set will usually become relatively warm during transmission Any equipment should be at least 1 inch 3cm away from the unit so as to provide good ventilation Be sure that nothing is on and just behind the rear PA heatsink to ensure good ventilation Also avoid places near outlets of heaters air conditioners etc 3 Place the unit so that the controls and switches can easily be handled and the frequency indication and meter can easily be read 4 For mobile installation an optional mounting bracket is available Select the best location that can stand the weight of the unit and that does not interfere with your driving in any way 5 Use the Ground Lug 3 3 POWER SUPPLY For AC operation use the special power supply IC PS15 or optional built in power supply IC PS35 If you would 3