Kenwood TS-820 manual Transmitter Section, Symptoms

Page 41

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7.4TRANSMITTER SECTION

SYMPTOMS

RF m e ~ e rdeflects with no outpur In0 piale

current.]

ALC meter doer not deflect and there ir output.

The TS-820 will not ooerate on SSB,

There is output, but the RF meter shows no output.

RF meter deflects too far.

VOX trips with AF round from the speak.

er.

VOX circuit releaser between words or holds too long.

Excessive plate current.

Plate current is too high or too low for

on all bandr.

Broad DRIVE tuning on one or more bandr.

No drive or intermittent drive on one or more bandr.

Low drive and broad DRIVE tuning on all bandr.

CAUSE

1.NO high voltage (+800v) on the final tuber.

2.Bad final tuber.

3.SG rwirch is turned off .

1.Too little MIC gain.

1.Open microohone plug or bad micro. phone.

2. Too little microphone gain.

3 . Defective microphone am~lifieron the GENERATOR board.

1.RF VOLT control not adjusted cor- rectly.

1.RF VOLT control not adjusted cor- rectly.

1.VOX GAIN control i s closed.

2.VOX switch is OFF.

1.ANTI VOX control requires adjust- ment.

1.VOX time hold control requires adiurt- ment.

1.Detuned final recrion.

2.Low negative power supply voltage.

3 . Idling current requires adjustment.

1.Carrier requires adjustment.

requires alignment.

1 . PLL unic requires adjustment.

1.Bad driver tube.

1. Carriei requires balancing.

REMEDY

1.Cheek the HV power supply.

2.Replace the tuber.

3.Slide the switch up.

1.Increase the MIC GAIN control.

1.Check the microphone.

2.Increase the MIC GAIN conlrol.

3. Repair the circuit.

1.Adiurt control for 213 scale readong ar full output.

1.Adjust control for 213 scale reading at full output.

1.See Semion 4.12

2.Turn the switch on.

1.See Section 4.12.

1.See Section 4.12.

1.See Section 6.4

2.Check the power rupoly ourput.

3 . See Section 4.1 I

-

1. Adiurt CAR conrrol.

1. See Section 6.4.

1.See Section 6.4.

1.Replace the tube.

1.See Section 6.4

1

i

!

!

I Signal reports of dirtortian.

1 1.

Too

much microphone gain.

Plate current is too low.

1.

Bad

final rubes.

Tuning becomer very broad.

Idling current increaser.

Every rime either of the final tuber is replaced, the TS-820 requirer neutraltrb tion.

( 1. Reduce MIC control.

1.Replace the tuber.

1.See Section 6.4

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Contents Operating Manual Contents Mode WWVAudio Input Impedance Audio Output ImpedanceSection FeaturesPower Connections InstallationUnpacking Operation LocationKEY HeadphonesExternal Speaker a N D Rtty FS KAC Operation ANTSuitable PTT Microphone Front View Panel Operating Controls@ VFO Indicator @ Meter Switch@ Stand by Switch @ ATT Indicator@ N B Switch VOX SwitchC Switch C Connector@ Function Switch @ B a N D Switch@! H. S W Heater Switch @ Power SwitchRear Panel View Display Hold Switch@ Drive Knob @ Plate KnobRear PAN EL Controls @ Remote Connector External VFO Connector@ DC-DC Converter Connecting Hole PIN FunctionOperating Instructions Preliminary ProcedureReceiver T U N I N G Reading the Operating FrequencyRF G a l N Calibrating T H E FrequenciesCalibrating the Fixed Channel a N D VFO Freciuencies Calibrating the T S 8 2 0 W I T H VFO-8209NOISE Blanker If ShiftAGC a U T O M a T I C Gain Control 1 Transmitter T U N I N GUP on ALCFront Panel Controls 3 C W O P E R a T I O N 2 SSB O P E R a T I O N5 Fixed Frequency Operation 4 Operation W l T H a Linear AmplifierMobile Operation 6 Internal Cross Channel Operation9 Rtty Operation Function TransmitSstv Slow Scan TV Operation USE of Monitor SwitchOperation with a Phone Patch Novice OperationTS-820 Block Diagram General Block D I a G R a MTransmitter Section Receiver SectionBoard a N D Unit Coil Pack Board PLL Unit Counter Assy Unit Display Unit Display Unit OptionAF AVR Board I N a L Stage Power Amplifier General Information Maintenance and AlignmentInstalling the D C D C Converter IDS AccessoriesI b l Transverter TV-5021 Remote Connections Extension Feet Fixed Channel Crystal InstallationAdjustment of Receiver Section Adjustment of T R a N S M I T if Coil if a N D RF Units Adjustment of Transmitter SectionCarrier Balance Adjustment if UNIT1 Neutralizing the Final StageGeneral Information TrolibleshootingTransmitter a N D Receiver Circuits Receiver SectionTransmitter Section SymptomsFAN TOP & Bottom View of the TS-820Page IO--KENWOOD Corporation

TS-820 specifications

The Kenwood TS-820 is a high-performance amateur radio transceiver known for its exceptional features and technologies that cater to both novice and experienced operators. This rig, part of Kenwood's renowned TS series, has become a popular choice for those seeking reliability and versatility in their communication equipment.

One of the defining characteristics of the TS-820 is its dual-conversion superheterodyne receiver architecture. This design minimizes interference and provides improved performance across various amateur radio bands. With coverage from 160 meters to 10 meters, the TS-820 is capable of operating on all major HF amateur bands, making it an excellent choice for diverse communication purposes.

In terms of power, the TS-820 delivers a solid output of 100 watts, ensuring that operators can make their presence known across the airwaves. The rig features a built-in automatic antenna tuner, which simplifies the setup process by matching the transmitter to various antenna types. This feature not only enhances signal clarity but also maximizes the station's efficiency.

Another standout feature of the TS-820 is its extensive digital signal processing (DSP) capabilities. The advanced filtering options help to eliminate noise and interference, allowing users to hear weaker signals more clearly and effectively. The IF filter selections can be adjusted to optimize reception under varying conditions, showcasing the rig's adaptability.

The user interface of the TS-820 is designed for both ease of use and functionality. The large, backlit display provides critical information at a glance, while the rotary controls offer tactile feedback, allowing operators to make precise adjustments quickly. Additionally, the rig supports various modes of operation, including SSB, CW, and RTTY, accommodating a wide range of communication preferences.

Built with durability in mind, the TS-820 utilizes high-quality components and construction techniques that ensure long-term reliability. Its rugged design can withstand the rigors of everyday use, making it a trustworthy companion for any amateur radio enthusiast.

In summary, the Kenwood TS-820 is a versatile and reliable amateur radio transceiver that stands out due to its superior performance, advanced technologies, and user-friendly features. With its robust design and comprehensive capabilities, the TS-820 continues to earn its place as a respected choice among ham radio operators around the world. Whether engaged in casual conversation or competitive contesting, enthusiasts can rely on the TS-820 for a satisfying and immersive amateur radio experience.
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