Kenwood TS-520S Manuale utente

Kenwood TS-520S Hybrid Transceiver Tune-Up Cheat Sheet

For the Radio Amateur Amateur

Location Control Position

FRONT PANEL CONTROLS

REAR PANEL CONTROLS

BAND Switch

POWER Switch

H. SW Switch

Stand-b Switch

MODE Switch

VOX Switch

MIC Ctl.

CAR Ctl.

METER Switch

PLATE Ctl.

DRIVE Ctl.

FUNCTION Switch

RIT Switch

SG Switch

EXT VFO Connector

Desired band

REC (RECEIVE)

USB or LSB depending on band

MAN

FULLY Counter-clockwise

Centered

IP (plate current)

Middle of the range for band

Centered

VFO

OFF

UP (ON)

Jumper plug inserted (see

manual)

I. PRE-TUNE UP

1. Connect to 50 Ohm dumm load, or 50 Ohm antenna w/ SWR of less than 2:1.

2. Set controls to the Initial Switch Settings for Transmission (see above table)

3. Tune knob to desired operating frequenc .

II. PLATE IDLING CURRENT

1. Flip SEND and check that plate current is 60 ma (milli-amperes). If not, adjust via BIAS

controls on the side panel. Switch back to REC.

1. NOTE If it is wa more than 60 ma, DO NOT leave the SEND switch on. It will

shorten the life of the final tubes.

III. DRIVE TUNING

1. Shift METER to ALC and MODE to TUN. Flip to SEND and peak (maximum meter

deflection) the ALC with the DRIVE CONTROL. Flip back to REC.

1. NOTE If there is no ALC reading indicated, increase the CAR control until there is a

reading.

IV. PLATE TUNING (READ BEFORE DOING)

1. Shift METER to IP, leave MODE at TUN and flip SEND.

2. QUICKLY adjust the PLATE control to dip the plate current (a minimum meter reading).

Flip back to REC.

1. NOTE With the radio in the TUN mode, most of the screen voltage is reduced b as

much as 50% and the ke ing circuit is shorted.

V. PLATE AND LOAD TUNING ( CAUTION: REALLY READ BEFORE DOING)

1. Switch MODE to CW. Turn the METER to RF.

2. Flip the SEND switch and QUICKLY adjust the PLATE control and then the LOAD control

alternatel to peak (maximum meter defle tion) the power output.

3. If necessar , adjust RF VOLT control (side) to bring output to about 2/3 scale reading.

1. NOTE When in the CW position, there is nothing to screen the RF Voltage. Thus, don’t

leave SEND on for more than 10 SECONDS. An more and ou’ll shorten the life of

the tubes.

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