Kenwood TS-820 manual SSB O P E R a T I O N, C W O P E R a T I O N

PLATE A N D L O A D T U N I N G

CAUTION: When the MODE switch is in the CW positlon tile final tubes draw full plate current in transm#t. Final tube life is directly related to the length of tune-up periods. Do not transmit with the tubes out of resonance for more than 1 0 seconds at a tlme.

Turn the MODE switch to CW, turn the METER switch to RF. and set the stand~byswitch to the SEND position. Quickly adjust the PLATE control and then the LOAD control alter^ nately to peak (maximum meter deflection] the power out- put. If necessary, adjust the RF VOLTcontrol on the rear pa^ nel to bring the output reading to about a 2/3 scale reading.

NOTE 1 : The ALC meter is less deflected at the ON posi- tion of the SG switch or at the CW position of the MODE sw~tchthan at the OFF position or the TUN position of these switches. This indicates the normal state of RF NFB. The MIC knob and the CAR knob should be properly adjusted un- der normal transmit condftions.

NOTE 2: Transmission is not effected at the WWV or AUX positton of the BAND switch. If the transceiver is left in the transmit mode over a few minutes. the driver tube 12BY7A of the final stage may be damaged.

4 . 1 2 SSB O P E R A T I O N

Tune the TS-820 as described in Sections 4 1 to 4 . 1 1 Set the MODE switch to USE or LS8 and connect a microphone to the MIC connector.

NOTE lnternatlonal amateur practlce dictates uslng USB or LSB on the follow~ngbands

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21.0	MHz Band	USE
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28.0	MHz Band	USE

Key the transm~tterand speak into the microphone with the tone of vojce used in normal operation Adjust the MIC con- trol u n t ~voicel peaks are just within the top limit of the ALC range printed on the meter scale. The METER switch 1s in the ALC position If the transmitter section is driven beyond this range, the transm~ttedsignal will be distorted.

PTT OPERATION

By connecting the microphone equipped with PTT switch. the transceiver is readily used for PTT operation. For com- munication. depress PTT switch with STANDBY switch left in the REC position.

VOX OPERATION

Adlilsl tho transceiver as described in the previous para- graph. Flip the VOX switch onand close-talk into the micro- phone, increasing the VOX GAlN control until the VOX relay just operates. For VOX operation it is desirable to close-talk the microphone to prevent background noises from tripping the TS-820 mto transmission.

Check that the ALC reading for voice peaks is still within the ALC range on the meter, If necessary. adjust the MIC con- trol for a proper ALC reading.

I1 the VOX clicu~tis acttvated by speaker nolse. adjust the ANTI-VOX control Increase the control as necessary for proper VOX operatlon

Do not use more VOX GAlN or more ANTI VOX gain than necessary to control VOX operation. If the VOX circuit transfers between words, or holds too long. adjust the re- lease time constant by turning the DELAY control.

4 . 1 3 C W O P E R A T I O N

Tune and load the TS - 820 as described in Sections 4.1 through 4.1 1. Connect a key to the back panel CW KEY jack, set the MODE switch to CW. and set the stand-by switch to SEND for transmitting.

CW transmlsslons are automatically monitored through the speaker o f the transceiver The a u d ~ ogaln of the sldetone can be adjusted w ~ t hVR3 on the AF board

For semi-break-in operation. turn the VOX switch on. Hold the key down and increase the VOX GAlN control. until the VOX relay just operates. It is desired to change the release ttlne constant of the VOX circuit. adjust the DELAY control.

The plate current for CW operatlon should be about 200 ma Use the CAR control to adjust the carrler level for CW opcratlon At 2 0 0 ma of IP there may be no ALC read~ng

OPERATION W I T H O U T C W FILTER

Set the IF SHIFT knob to its center position and the RIT switch to the OFF position t o receive CW signal. Turn the maln tuning knob for about 8 0 0 Hz of beat signal and your tiansmlt frequency will be set to the transmit frequency of the opposite station (zeroing). During reception. the side tone monltor is activated by pressing down the key. In this case, listen to the side tone signal and the receive signal and adlust the maln tuning knob so that the cycle of the sound is increased. By so doing. the zeroing of frequencies can be achieved. After zeroing. set the RIT swltch to ON and turn the RIT knob for the pitch that suits your listening taste.