Kenwood TS-780 Instruction Manual

Also see for TS-780: Service manual Instruction manual Instruction manual

Contents

With the RIT switch ON, the RIT knob allows the Operatorto vary the receive frequency by about f 1.5 kHz withoutaffecting the transmit frequency. The Center Position “0”is RIT-OFF.26 RIT Control 3 6 M . S SwitchThis switch selects and scans the frequency stored in thememory channel. Scan is released by the HOLD switch orby setting the transceiver in transmit mode.2 7 IF SHIFT KnobBy using this control, the IF crystal filter Center frequencycan be shifted + 1 kHz, allowing adjustment of tone quali-ty, or eliminating interference from adjacent frequencies.For normal Operation, this control should be set to theCenter “ 0 ” Position (detent).28 SQUELCH ControlT u r n i n g t h i s c o n t r o l c l o c k w i s e during F M m o d e w i l lactivate the squelch circuit.2 9 S C A N - WThis switch is used to select the scan width (0.5, 1, 3, 5and 10 MHz).30 AF GAIN ControlThis control adjusts the gain of the receiver audio amplifier.Clockwise rotation will increase the output level31 RF GAIN ControlFor adjusting the RF amplifier gain of the receiver. The gainis minimum at the extreme counterclockwise Position. Nor-mally, this control is set in its extreme clockwise Position.3 2 F . S T E P SwitchBy using this switch, the VFO frequency is varied at a slowor fast Speed as shown below. The operating conditionscan be checked on the F. STEP indicator.F . S T E PO F F O NSSB.CW,FM 20 Hz 200 HzFM - CH 12.5 kHz 5 kHz 133 RIT SwitchThis push switch turns the RIT (Receiver Increment Tuning)circuit ON and OFF. With the switch depressed, the circuitis activated and the RIT indicator is illuminated. The RIT cir-cuit is turned OFF when the switch is out.3 4 S C A N SwitchThis switch turns ON and OFF the VFO scan circuit. TheVFO frequency is scanned at the Speed selected by theF. STEP switch. The switch is also used for re-scanning ofM. S (memory scan) or for scanning at busy stop.3 5 H O L DThis switch is used to stop scan Operation.3 7 B A N D SwitchFor selecting the band (144-145 MHz or 430-439 MHz)to be operated. By pressing the UP switch, the frequency isstepped up band by band. When the DOWN switch ispressed, the frequency is stepped down band by band. Ineither case, the band is switched in 1 MHz Steps.3 8 M ( M e m o r y ) SwitchThis switch is used to store the desired frequency in thememory channel.When the switch is depressed, an oscillation Sound ish e a r d , i n d i c a t i n g t h a t t h e f r e q u e n c y i s s t o r e d i n t h ememory channel.3 9 F . L O C K SwitchThis switch locks the operating frequency of VFO. With theswitch ON, the VFO frequency remains unchanged evenwhen the tuning knob, BAND switch or MIC UP/DOWNs w i t c h i s m a n i p u l a t e d . T h i s f e a t u r e i s u s e f u l w h e noperating the transceiver on the same frequency for manyhours, or when it is used for mobile Operation.The RIT switch can be used even in the ON Position of theF. LOCK switch. The F. LOCK indicator will light when theF. LOCK switch is ON.4 0 M . R ( M e m o r y Recalll SwitchMemory channel is called out when this switch is turnedON. For the channels in which frequencies are not stored,the corresponding channel numbers are indicated.3-2. REAR PANEL1 430 MHz ANT (antenna) Connector IN type)For connection of the 430 MHz band antenna.2 144 MHz ANT (antenna) Connector (M type)For connection of the 144 MHz band antenna.3 H e a t S i n kDissipates heat from the final Stage transistors and powersupply transistors.4 C W K E Y JackThis jack is used for operating the transceiver in CW mode.Connect a telegraph key using a 2P plug.5 SP (Extemal Speaker) JackConnect an external speaker of 4-8 ohms impedance usingthe supplied plug.7